1
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Santiago JL, Rivas E, Sanchez B, Buccolieri R, Vivanco MG, Martilli A, Martín F. Impact of single and combined local air pollution mitigation measures in an urban environment. Sci Total Environ 2024; 924:171441. [PMID: 38447731 DOI: 10.1016/j.scitotenv.2024.171441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 02/22/2024] [Accepted: 03/01/2024] [Indexed: 03/08/2024]
Abstract
Urban air pollution is one of the most important environmental problems for human health and several strategies have been developed for its mitigation. The objective of this study is to assess the impact of single and combined mitigation measures on concentrations of air pollutants emitted by traffic at pedestrian level in the same urban environment. The effectiveness of different scenarios of green infrastructure (GI), the implementation of photocatalytic materials and traffic low emission zones (LEZ) are investigated, as well as several combinations of LEZ and GI. A wide set of scenarios is simulated through Computational Fluid Dynamics (CFD) modelling for two different wind directions (perpendicular (0°) and 45° wind directions). Wind flow for the BASE scenario without any measure implemented was previously evaluated using wind-tunnel measurements. Air pollutant concentrations for this scenario are compared with the results obtained from the different mitigation scenarios. Reduction of traffic emissions through LEZ is found to be the most effective single measure to improve local air quality. However, GI enhances the effects of LEZ, which makes the combination of LEZ + GI a very effective measure. The effectiveness of this combination depends on the GI layout, the intensity of emission reduction in the LEZ and the traffic diversion in streets surrounding the LEZ. These findings, in line with previous literature, suggest that the implementation of GI may increase air pollutant concentrations at pedestrian level for some cases. However, this study highlights that this negative effect on air quality can turn into positive when used in combination with reductions of local traffic emissions.
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Affiliation(s)
- J L Santiago
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain.
| | - E Rivas
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain; Vicerrectorado de Investigación, Innovación y Doctorado, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - B Sanchez
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
| | - R Buccolieri
- Department of Environmental and Biological Sciences and technologies, Laboratory of Micrometeorology, University of Salento, S.P. 6 Lecce-Monteroni, 73100 Lecce, Italy; Institute of Atmospheric Sciences and Climate (ISAC), National Research Council (CNR), S.P. Lecce-Monteroni km 1,2, 73100 Lecce, Italy
| | - M G Vivanco
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
| | - A Martilli
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
| | - F Martín
- Atmospheric Modelling Unit, Environmental Department, CIEMAT, Av. Complutense 40, 28040 Madrid, Spain
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2
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Martín F, Janssen S, Rodrigues V, Sousa J, Santiago JL, Rivas E, Stocker J, Jackson R, Russo F, Villani MG, Tinarelli G, Barbero D, José RS, Pérez-Camanyo JL, Santos GS, Bartzis J, Sakellaris I, Horváth Z, Környei L, Liszkai B, Kovács Á, Jurado X, Reiminger N, Thunis P, Cuvelier C. Using dispersion models at microscale to assess long-term air pollution in urban hot spots: A FAIRMODE joint intercomparison exercise for a case study in Antwerp. Sci Total Environ 2024; 925:171761. [PMID: 38494008 DOI: 10.1016/j.scitotenv.2024.171761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 03/08/2024] [Accepted: 03/14/2024] [Indexed: 03/19/2024]
Abstract
In the framework of the Forum for Air Quality Modelling in Europe (FAIRMODE), a modelling intercomparison exercise for computing NO2 long-term average concentrations in urban districts with a very high spatial resolution was carried out. This exercise was undertaken for a district of Antwerp (Belgium). Air quality data includes data recorded in air quality monitoring stations and 73 passive samplers deployed during one-month period in 2016. The modelling domain was 800 × 800 m2. Nine modelling teams participated in this exercise providing results from fifteen different modelling applications based on different kinds of model approaches (CFD - Computational Fluid Dynamics-, Lagrangian, Gaussian, and Artificial Intelligence). Some approaches consisted of models running the complete one-month period on an hourly basis, but most others used a scenario approach, which relies on simulations of scenarios representative of wind conditions combined with post-processing to retrieve a one-month average of NO2 concentrations. The objective of this study is to evaluate what type of modelling system is better suited to get a good estimate of long-term averages in complex urban districts. This is very important for air quality assessment under the European ambient air quality directives. The time evolution of NO2 hourly concentrations during a day of relative high pollution was rather well estimated by all models. Relative to high resolution spatial distribution of one-month NO2 averaged concentrations, Gaussian models were not able to give detailed information, unless they include building data and street-canyon parameterizations. The models that account for complex urban geometries (i.e. CFD, Lagrangian, and AI models) appear to provide better estimates of the spatial distribution of one-month NO2 averages concentrations in the urban canopy. Approaches based on steady CFD-RANS (Reynolds Averaged Navier Stokes) model simulations of meteorological scenarios seem to provide good results with similar quality to those obtained with an unsteady one-month period CFD-RANS simulations.
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Affiliation(s)
- F Martín
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain.
| | - S Janssen
- VITO NV, Flemish Institute for Research and Technology, Boeretang 200, 2400 Mol, Belgium
| | - V Rodrigues
- CESAM & Department of Environment and Planning, University of Aveiro, 3810-193 Aveiro, Portugal
| | - J Sousa
- VITO NV, Flemish Institute for Research and Technology, Boeretang 200, 2400 Mol, Belgium
| | - J L Santiago
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain
| | - E Rivas
- CIEMAT, Research Center for Energy, Environment and Technology, Avenida Complutense 40, 28040 Madrid, Spain
| | - J Stocker
- Cambridge Environmental Research Consultants (CERC), UK
| | - R Jackson
- Cambridge Environmental Research Consultants (CERC), UK
| | - F Russo
- ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, 40129 Bologna, Italy
| | - M G Villani
- ENEA, Italian National Agency for New Technologies, Energy and Sustainable Economic Development, 40129 Bologna, Italy
| | - G Tinarelli
- ARIANET S.r.l., via Crespi 57, 20159 Milano, Italy
| | - D Barbero
- ARIANET S.r.l., via Crespi 57, 20159 Milano, Italy
| | - R San José
- Computer Science School, Technical University of Madrid (UPM), Campus de Montegancedo, s/n, 28660 Madrid, Spain
| | - J L Pérez-Camanyo
- Computer Science School, Technical University of Madrid (UPM), Campus de Montegancedo, s/n, 28660 Madrid, Spain
| | - G Sousa Santos
- NILU - The Climate and Environmental Research Institute, Norway
| | - J Bartzis
- University of Western Macedonia (UOWM), Dept. of Mechanical Engineering, Sialvera & Bakola Str., 50132 Kozani, Greece
| | - I Sakellaris
- University of Western Macedonia (UOWM), Dept. of Mechanical Engineering, Sialvera & Bakola Str., 50132 Kozani, Greece
| | - Z Horváth
- SZE, Széchenyi István University, Győr, Hungary
| | - L Környei
- SZE, Széchenyi István University, Győr, Hungary
| | - B Liszkai
- SZE, Széchenyi István University, Győr, Hungary
| | - Á Kovács
- SZE, Széchenyi István University, Győr, Hungary
| | | | - N Reiminger
- AIR&D, Strasbourg, France; ICUBE Laboratory, UMR 7357, CNRS/University of Strasbourg, F-67000 Strasbourg, France
| | - P Thunis
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - C Cuvelier
- European Commission, Joint Research Centre (JRC), Ispra, Italy
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3
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Kuraoka T, Goto S, Kanno M, Díaz-Tendero S, Reino-González J, Trinter F, Pier A, Sommerlad L, Melzer N, McGinnis OD, Kruse J, Wenzel T, Jahnke T, Xue H, Kishimoto N, Yoshikawa K, Tamura Y, Ota F, Hatada K, Ueda K, Martín F. Tracing Photoinduced Hydrogen Migration in Alcohol Dications from Time-Resolved Molecular-Frame Photoelectron Angular Distributions. J Phys Chem A 2024; 128:1241-1249. [PMID: 38324399 PMCID: PMC10895665 DOI: 10.1021/acs.jpca.3c07640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 02/09/2024]
Abstract
The recent implementation of attosecond and few-femtosecond X-ray pump/X-ray probe schemes in large-scale free-electron laser facilities has opened the way to visualize fast nuclear dynamics in molecules with unprecedented temporal and spatial resolution. Here, we present the results of theoretical calculations showing how polarization-averaged molecular-frame photoelectron angular distributions (PA-MFPADs) can be used to visualize the dynamics of hydrogen migration in methanol, ethanol, propanol, and isopropyl alcohol dications generated by X-ray irradiation of the corresponding neutral species. We show that changes in the PA-MFPADs with the pump-probe delay as a result of intramolecular photoelectron diffraction carry information on the dynamics of hydrogen migration in real space. Although visualization of this dynamics is more straightforward in the smaller systems, methanol and ethanol, one can still recognize the signature of that motion in propanol and isopropyl alcohol and assign a tentative path to it. A possible pathway for a corresponding experiment requires an angularly resolved detection of photoelectrons in coincidence with molecular fragment ions used to define a molecular frame of reference. Such studies have become, in principle, possible since the first XFELs with sufficiently high repetition rates have emerged. To further support our findings, we provide experimental evidence of H migration in ethanol-OD from ion-ion coincidence measurements performed with synchrotron radiation.
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Affiliation(s)
- T. Kuraoka
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - S. Goto
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - M. Kanno
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - S. Díaz-Tendero
- Departamento
de Química, Universidad Autónoma
de Madrid, Madrid 28049, Spain
- Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, Madrid 28049, Spain
- Institute
for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - J. Reino-González
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain
| | - F. Trinter
- Molecular
Physics, Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, Berlin 14195, Germany
| | - A. Pier
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - L. Sommerlad
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - N. Melzer
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - O. D. McGinnis
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - J. Kruse
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - T. Wenzel
- Institut
für Kernphysik, Goethe-Universität
Frankfurt, Max-von-Laue-Straβe 1, Frankfurt am
Main 60438, Germany
| | - T. Jahnke
- Max-Planck-Institut
für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
- European
XFEL, Holzkoppel
4, Schenefeld 22869, Germany
| | - H. Xue
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - N. Kishimoto
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - K. Yoshikawa
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - Y. Tamura
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - F. Ota
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - K. Hatada
- Department
of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan
| | - K. Ueda
- Department
of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
| | - F. Martín
- Departamento
de Química, Universidad Autónoma
de Madrid, Madrid 28049, Spain
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain
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4
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Ayani CG, Pisarra M, Ibarburu IM, Garnica M, Miranda R, Calleja F, Martín F, Vázquez de Parga AL. Probing the Phase Transition to a Coherent 2D Kondo Lattice. Small 2024; 20:e2303275. [PMID: 37875781 DOI: 10.1002/smll.202303275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 09/28/2023] [Indexed: 10/26/2023]
Abstract
Kondo lattices are systems with unusual electronic properties that stem from strong electron correlation, typically studied in intermetallic 3D compounds containing lanthanides or actinides. Lowering the dimensionality of the system enhances the role of electron correlations providing a new tuning knob for the search of novel properties in strongly correlated quantum matter. The realization of a 2D Kondo lattice by stacking a single-layer Mott insulator on a metallic surface is reported. The temperature of the system is steadily lowered and by using high-resolution scanning tunneling spectroscopy, the phase transition leading to the Kondo lattice is followed. Above 27 K the interaction between the Mott insulator and the metal is negligible and both keep their original electronic properties intact. Below 27 K the Kondo screening of the localized electrons in the Mott insulator begins and below 11 K the formation of a coherent quantum electronic state extended to the entire sample, i.e., the Kondo lattice, takes place. By means of density functional theory, the electronic properties of the system and its evolution with temperature are explained. The findings contribute to the exploration of unconventional states in 2D correlated materials.
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Affiliation(s)
- Cosme G Ayani
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, Madrid, 28049, Spain
| | - Michele Pisarra
- Dipartimento di Física, Università della Calabria, Via P. Bucci, Cubo 30C and INFN, Sezione LNF, Gruppo collegato di Cosenza, Cubo 31C, Rende (CS), 87036, Italy
| | - Iván M Ibarburu
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Manuela Garnica
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, Madrid, 28049, Spain
| | - Rodolfo Miranda
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, Madrid, 28049, Spain
- IFIMAC, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Fabián Calleja
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, Madrid, 28049, Spain
| | - Fernando Martín
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, Madrid, 28049, Spain
- Dep. Química Módulo 13, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
| | - Amadeo L Vázquez de Parga
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- IMDEA Nanociencia, Calle Faraday 9, Cantoblanco, Madrid, 28049, Spain
- IFIMAC, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
- Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Cantoblanco, Madrid, 28049, Spain
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5
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Pranjal P, González-Vázquez J, Bello RY, Martín F. Resonant Photoionization of CO 2 up to the Fourth Ionization Threshold. J Phys Chem A 2024; 128:182-190. [PMID: 38118433 PMCID: PMC10788902 DOI: 10.1021/acs.jpca.3c06947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/28/2023] [Accepted: 11/29/2023] [Indexed: 12/22/2023]
Abstract
We present a comprehensive theoretical study of valence-shell photoionization of the CO2 molecule by using the XCHEM methodology. This method makes use of a fully correlated molecular electronic continuum at a level comparable to that provided by state-of-the-art quantum chemistry packages in bound-state calculations. The calculated total and angularly resolved photoionization cross sections are presented and discussed, with particular emphasis on the series of autoionizing resonances that appear between the first and the fourth ionization thresholds. Ten series of Rydberg autoionizing states are identified, including some not previously reported in the literature, and their energy positions and widths are provided. This is relevant in the context of ongoing experimental and theoretical efforts aimed at observing in real-time (attosecond time scale) the autoionization dynamics in molecules.
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Affiliation(s)
- Prateek Pranjal
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia),
Cantoblanco, 28049 Madrid, Spain
| | - Jesús González-Vázquez
- Departamento
de Química, Módulo 13, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Roger Y. Bello
- Departamento
de Química Física Aplicada, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Martín
- Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia),
Cantoblanco, 28049 Madrid, Spain
- Departamento
de Química, Módulo 13, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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6
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Gong X, Plésiat É, Palacios A, Heck S, Martín F, Wörner HJ. Attosecond delays between dissociative and non-dissociative ionization of polyatomic molecules. Nat Commun 2023; 14:4402. [PMID: 37479730 PMCID: PMC10361961 DOI: 10.1038/s41467-023-40120-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Accepted: 07/12/2023] [Indexed: 07/23/2023] Open
Abstract
The interplay between electronic and nuclear motions in molecules is a central concept in molecular science. To what extent it influences attosecond photoionization delays is an important, still unresolved question. Here, we apply attosecond electron-ion coincidence spectroscopy and advanced calculations that include both electronic and nuclear motions to study the photoionization dynamics of CH4 and CD4 molecules. These molecules are known to feature some of the fastest nuclear dynamics following photoionization. Remarkably, we find no measurable delay between the photoionization of CH4 and CD4, neither experimentally nor theoretically. However, we measure and calculate delays of up to 20 as between the dissociative and non-dissociative photoionization of the highest-occupied molecular orbitals of both molecules. Experiment and theory are in quantitative agreement. These results show that, in the absence of resonances, even the fastest nuclear motion does not substantially influence photoionization delays, but identify a previously unknown signature of nuclear motion in dissociative-ionization channels. These findings have important consequences for the design and interpretation of attosecond chronoscopy in molecules, clusters, and liquids.
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Affiliation(s)
- Xiaochun Gong
- Laboratorium für Physikalische Chemie, ETH Zürich, 8093, Zürich, Switzerland.
- State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, 200241, China.
| | - Étienne Plésiat
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Alicia Palacios
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Institute of Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Saijoscha Heck
- Laboratorium für Physikalische Chemie, ETH Zürich, 8093, Zürich, Switzerland
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nano), Cantoblanco, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
| | - Hans Jakob Wörner
- Laboratorium für Physikalische Chemie, ETH Zürich, 8093, Zürich, Switzerland.
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7
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Wang E, Kling NG, LaForge AC, Obaid R, Pathak S, Bhattacharyya S, Meister S, Trost F, Lindenblatt H, Schoch P, Kübel M, Pfeifer T, Rudenko A, Díaz-Tendero S, Martín F, Moshammer R, Rolles D, Berrah N. Ultrafast Roaming Mechanisms in Ethanol Probed by Intense Extreme Ultraviolet Free-Electron Laser Radiation: Electron Transfer versus Proton Transfer. J Phys Chem Lett 2023; 14:4372-4380. [PMID: 37140167 DOI: 10.1021/acs.jpclett.2c03764] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Ultrafast H2+ and H3+ formation from ethanol is studied using pump-probe spectroscopy with an extreme ultraviolet (XUV) free-electron laser. The first pulse creates a dication, triggering H2 roaming that leads to H2+ and H3+ formation, which is disruptively probed by a second pulse. At photon energies of 28 and 32 eV, the ratio of H2+ to H3+ increases with time delay, while it is flat at a photon energy of 70 eV. The delay-dependent effect is ascribed to a competition between electron and proton transfer. High-level quantum chemistry calculations show a flat potential energy surface for H2 formation, indicating that the intermediate state may have a long lifetime. The ab initio molecular dynamics simulation confirms that, in addition to the direct emission, a small portion of H2 undergoes a roaming mechanism that leads to two competing pathways: electron transfer from H2 to C2H4O2+ and proton transfer from C2H4O2+ to H2.
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Affiliation(s)
- Enliang Wang
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, United States
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China
| | - Nora G Kling
- Physics Department, University of Connecticut, Storrs, Connecticut 06269-3046, United States
| | - Aaron C LaForge
- Physics Department, University of Connecticut, Storrs, Connecticut 06269-3046, United States
| | - Razib Obaid
- Physics Department, University of Connecticut, Storrs, Connecticut 06269-3046, United States
| | - Shashank Pathak
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, United States
| | - Surjendu Bhattacharyya
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, United States
| | - Severin Meister
- Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Florian Trost
- Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Hannes Lindenblatt
- Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Patrizia Schoch
- Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Matthias Kübel
- Institute of Optics and Quantum Electronics, Friedrich Schiller University Jena, D-07743 Jena, Germany
- Helmholtz Institute Jena, Fröbelstieg 3, 07743 Jena, Germany
| | - Thomas Pfeifer
- Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Artem Rudenko
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, United States
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049 Madrid, Spain
| | - Robert Moshammer
- Max Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Daniel Rolles
- J. R. Macdonald Laboratory, Department of Physics, Kansas State University, Manhattan, Kansas 66506-2604, United States
| | - Nora Berrah
- Physics Department, University of Connecticut, Storrs, Connecticut 06269-3046, United States
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8
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Borràs VJ, González-Vázquez J, Argenti L, Martín F. Attosecond photoionization delays in the vicinity of molecular Feshbach resonances. Sci Adv 2023; 9:eade3855. [PMID: 37043566 PMCID: PMC10096576 DOI: 10.1126/sciadv.ade3855] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Accepted: 03/13/2023] [Indexed: 06/19/2023]
Abstract
Temporal delays extracted from photoionization phases are currently determined with attosecond resolution by using interferometric methods. Such methods require special care when photoionization occurs near Feshbach resonances due to the interference between direct ionization and autoionization. Although theory can accurately handle these interferences in atoms, in molecules, it has to face an additional, so far insurmountable problem: Autoionization is slow, and nuclei move substantially while it happens, i.e., electronic and nuclear motions are coupled. Here, we present a theoretical framework to account for this effect and apply it to evaluate time-resolved and vibrationally resolved photoelectron spectra and photoionization phases of N2 irradiated by a combination of an extreme ultraviolet (XUV) attosecond pulse train and an infrared pulse. We show that Feshbach resonances lead to unusual non-Franck-Condon vibrational progressions and to ionization phases that strongly vary with photoelectron energy irrespective of the vibrational state of the remaining molecular cation.
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Affiliation(s)
- Vicent J. Borràs
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Jesús González-Vázquez
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Luca Argenti
- Department of Physics and CREOL, University of Central Florida, Orlando, FL 32186, USA
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nano), Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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9
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Abstract
We have evaluated total and partial photoionization cross sections, β asymmetry parameters, and molecular frame photoelectron angular distributions (MFPADs) of the water molecule by using the XCHEM methodology. This method accounts for electron correlation in the electronic continuum, which is crucial to describe Feshbach resonances and their autoionization decay. We have identified a large number of Feshbach resonances, some of them previously unknown, in the region between 12.2 and 18.7 eV, for which we provide energy positions and widths. Many of these resonances lead to pronounced peaks in the photoionization spectra, some of them remarkably wide (up to 0.2 eV, for resonances converging to the third ionization threshold), which should be observable in high-energy resolution experiments. We show that, in the vicinity of these peaks, both asymmetry parameters and MFPADs vary very rapidly with photoelectron energy, which, as in atoms and simpler molecules, reflects the interference between direct ionization and autoionization, which is mostly driven by electron correlation.
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Affiliation(s)
- P Fernández-Milán
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - V J Borràs
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - J González-Vázquez
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - F Martín
- Departamento de Química, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
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10
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Amado CA, Martín-Audera P, Agüero J, Lavín BA, Guerra AR, Boucle D, Ferrer-Pargada D, Berja A, Martín F, Casanova C, García-Unzueta M. Circulating levels of mitochondrial oxidative stress-related peptides MOTS-c and Romo1 in stable COPD: A cross-sectional study. Front Med (Lausanne) 2023; 10:1100211. [PMID: 36844198 PMCID: PMC9944395 DOI: 10.3389/fmed.2023.1100211] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 01/23/2023] [Indexed: 02/10/2023] Open
Abstract
Background MOTS-c and Romo1 are mitochondrial peptides that are modulated by oxidative stress. No previous studies have explored circulating levels of MOTS-c in patients with chronic obstructive pulmonary disease (COPD). Methods We enrolled 142 patients with stable COPD and 47 smokers with normal lung function in an observational cross-sectional study. We assessed serum levels of both MOTS-c and Romo1 and associated these findings with clinical characteristics of COPD. Results Compared with smokers with normal lung function, patients with COPD had lower levels of MOTS-c (p = 0.02) and higher levels of Romo1 (p = 0.01). A multivariate logistic regression analysis revealed that above-median MOTS-c levels were positively associated with Romo1 levels (OR 1.075, 95% CI 1.005-1.150, p = 0.036), but no association was found with other COPD characteristics. Below-median levels of circulating MOTS-c were associated with oxygen desaturation (OR 3.25 95% CI 1.456-8.522, p = 0.005) and walking <350 meters (OR 3.246 95% CI 1.229-8.577, p = 0.018) in six-minute walk test. Above-median levels of Romo1 were positively associated with current smoking (OR 2.756, 95% CI 1.133-6.704, p = 0.025) and negatively associated with baseline oxygen saturation (OR 0.776 95% CI 0.641-0.939, p = 0.009). Conclusions Reduced levels of circulating MOTS-c and increased levels of Romo1 were detected in patients diagnosed with COPD. Low levels of MOTS-c were associated with oxygen desaturation and poorer exercise capacity using 6 min walk test. Romo1 was associated with current smoking and baseline oxygen saturation. Trial registration www.clinicaltrials.gov; No.: NCT04449419; URL: www.clinicaltrials.gov. Date of registration: June 26, 2020.
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Affiliation(s)
- Carlos A. Amado
- Department of Pulmonology, Hospital Universitario Marqués de Valdecilla, Santander, Spain,University of Cantabria, Santander, Spain,IDIVAL (Instituto de Investigación Biomédica de Cantabria), Santander, Spain,*Correspondence: Carlos A. Amado ✉
| | - Paula Martín-Audera
- Department of Clinical Biochemistry, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Juan Agüero
- Department of Pulmonology, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Bernardo A. Lavín
- Department of Clinical Biochemistry, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Armando R. Guerra
- Department of Clinical Biochemistry, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | | | - Diego Ferrer-Pargada
- Department of Pulmonology, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Ana Berja
- Department of Clinical Biochemistry, Hospital Universitario Marqués de Valdecilla, Santander, Spain
| | - Fernando Martín
- Unidad de Deshabituación Tabáquica (UDESTA), Servicio Cántabro de Salud, Santander, Spain
| | - Ciro Casanova
- Servicio de Neumología-Unidad de Investigación, Hospital Universitario La Candelaria, Universidad de La Laguna, San Cristóbal de La Laguna, Spain
| | - Mayte García-Unzueta
- University of Cantabria, Santander, Spain,Department of Clinical Biochemistry, Hospital Universitario Marqués de Valdecilla, Santander, Spain
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11
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Caruso T, De Luca O, Melfi N, Policicchio A, Pisarra M, Godbert N, Aiello I, Giorno E, Pacilè D, Moras P, Martín F, Rudolf P, Agostino RG, Papagno M. Nearly-freestanding supramolecular assembly with tunable structural properties. Sci Rep 2023; 13:2068. [PMID: 36740719 PMCID: PMC9899781 DOI: 10.1038/s41598-023-28865-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 01/25/2023] [Indexed: 02/07/2023] Open
Abstract
The synthesis and design of two-dimensional supramolecular assemblies with specific functionalities is one of the principal goals of the emerging field of molecule-based electronics, which is relevant for many technological applications. Although a large number of molecular assemblies have been already investigated, engineering uniform and highly ordered two-dimensional molecular assemblies is still a challenge. Here we report on a novel approach to prepare wide highly crystalline molecular assemblies with tunable structural properties. We make use of the high-reactivity of the carboxylic acid functional moiety and of the predictable structural features of non-polar alkane chains to synthesize 2D supramolecular assemblies of 4-(decyloxy)benzoic acid (4DBA;C[Formula: see text]H[Formula: see text]O[Formula: see text]) on a Au(111) surface. By means of scanning tunneling microscopy, density functional theory calculations and photoemission spectroscopy, we demonstrate that these molecules form a self-limited highly ordered and defect-free two-dimensional single-layer film of micrometer-size, which exhibits a nearly-freestanding character. We prove that by changing the length of the alkoxy chain it is possible to modify in a controlled way the molecular density of the "floating" overlayer without affecting the molecular assembly. This system is especially suitable for engineering molecular assemblies because it represents one of the few 2D molecular arrays with specific functionality where the structural properties can be tuned in a controlled way, while preserving the molecular pattern.
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Affiliation(s)
- Tommaso Caruso
- grid.7778.f0000 0004 1937 0319Dipartimento di Fisica, Università della Calabria, 87036 Rende (Cs), Italy ,grid.7778.f0000 0004 1937 0319Laboratorio di Spettroscopia Avanzata dei Materiali, STAR IR, Via Tito Flavio, Università della Calabria, 87036 Rende (CS), Italy
| | - Oreste De Luca
- grid.7778.f0000 0004 1937 0319Laboratorio di Spettroscopia Avanzata dei Materiali, STAR IR, Via Tito Flavio, Università della Calabria, 87036 Rende (CS), Italy ,grid.4830.f0000 0004 0407 1981Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Nicola Melfi
- grid.7778.f0000 0004 1937 0319Dipartimento di Fisica, Università della Calabria, 87036 Rende (Cs), Italy
| | - Alfonso Policicchio
- grid.7778.f0000 0004 1937 0319Dipartimento di Fisica, Università della Calabria, 87036 Rende (Cs), Italy ,grid.7778.f0000 0004 1937 0319Laboratorio di Spettroscopia Avanzata dei Materiali, STAR IR, Via Tito Flavio, Università della Calabria, 87036 Rende (CS), Italy
| | - Michele Pisarra
- grid.6045.70000 0004 1757 5281INFN, Sezione LNF, Gruppo Collegato di Cosenza, Cubo 31C, 87036 Rende (CS), Italy ,grid.482876.70000 0004 1762 408XInstituto IMDEA Nanociencia, Calle Faraday 9, 28049 Madrid, Spain ,grid.5515.40000000119578126Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049, Madrid Spain
| | - Nicolas Godbert
- grid.7778.f0000 0004 1937 0319MAT_InLAB (Laboratorio di Materiali Molecolari Inorganici), Centro di Eccellenza CEMIF.CAL, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende (CS), Italy ,grid.7778.f0000 0004 1937 0319LPM-Laboratorio Preparazione Materiali, STAR-Lab, Università della Calabria, Via Tito Flavio, 28049 Rende (CS), Italy
| | - Iolinda Aiello
- grid.7778.f0000 0004 1937 0319MAT_InLAB (Laboratorio di Materiali Molecolari Inorganici), Centro di Eccellenza CEMIF.CAL, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende (CS), Italy ,grid.7778.f0000 0004 1937 0319LPM-Laboratorio Preparazione Materiali, STAR-Lab, Università della Calabria, Via Tito Flavio, 28049 Rende (CS), Italy ,grid.7778.f0000 0004 1937 0319CNR-Nanotec, UoS di Cosenza, Dipartimento di Fisica, Università della Calabria, 87036 Rende (CS), Italy
| | - Eugenia Giorno
- grid.7778.f0000 0004 1937 0319MAT_InLAB (Laboratorio di Materiali Molecolari Inorganici), Centro di Eccellenza CEMIF.CAL, LASCAMM CR-INSTM, Unità INSTM della Calabria, Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, 87036 Rende (CS), Italy ,grid.7778.f0000 0004 1937 0319LPM-Laboratorio Preparazione Materiali, STAR-Lab, Università della Calabria, Via Tito Flavio, 28049 Rende (CS), Italy
| | - Daniela Pacilè
- grid.7778.f0000 0004 1937 0319Dipartimento di Fisica, Università della Calabria, 87036 Rende (Cs), Italy
| | - Paolo Moras
- grid.472712.5Istituto di Struttura della Materia-CNR (ISM-CNR), 34149 Trieste, Italy
| | - Fernando Martín
- grid.482876.70000 0004 1762 408XInstituto IMDEA Nanociencia, Calle Faraday 9, 28049 Madrid, Spain ,grid.5515.40000000119578126Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049, Madrid Spain ,Condensed Matter Physics Center (IFIMAC), Cantoblanco, 28049 Madrid Spain
| | - Petra Rudolf
- grid.4830.f0000 0004 0407 1981Zernike Institute for Advanced Materials, University of Groningen, 9747 AG Groningen, The Netherlands
| | - Raffaele Giuseppe Agostino
- grid.7778.f0000 0004 1937 0319Dipartimento di Fisica, Università della Calabria, 87036 Rende (Cs), Italy ,grid.7778.f0000 0004 1937 0319Laboratorio di Spettroscopia Avanzata dei Materiali, STAR IR, Via Tito Flavio, Università della Calabria, 87036 Rende (CS), Italy
| | - Marco Papagno
- grid.7778.f0000 0004 1937 0319Dipartimento di Fisica, Università della Calabria, 87036 Rende (Cs), Italy ,grid.7778.f0000 0004 1937 0319Laboratorio di Spettroscopia Avanzata dei Materiali, STAR IR, Via Tito Flavio, Università della Calabria, 87036 Rende (CS), Italy
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12
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Varvarezos L, Delgado-Guerrero J, Di Fraia M, Kelly TJ, Palacios A, Callegari C, Cavalieri AL, Coffee R, Danailov M, Decleva P, Demidovich A, DiMauro L, Düsterer S, Giannessi L, Helml W, Ilchen M, Kienberger R, Mazza T, Meyer M, Moshammer R, Pedersini C, Plekan O, Prince KC, Simoncig A, Schletter A, Ueda K, Wurzer M, Zangrando M, Martín F, Costello JT. Controlling Fragmentation of the Acetylene Cation in the Vacuum Ultraviolet via Transient Molecular Alignment. J Phys Chem Lett 2023; 14:24-31. [PMID: 36562987 PMCID: PMC9841558 DOI: 10.1021/acs.jpclett.2c03354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
An open-loop control scheme of molecular fragmentation based on transient molecular alignment combined with single-photon ionization induced by a short-wavelength free electron laser (FEL) is demonstrated for the acetylene cation. Photoelectron spectra are recorded, complementing the ion yield measurements, to demonstrate that such control is the consequence of changes in the electronic response with molecular orientation relative to the ionizing field. We show that stable C2H2+ cations are mainly produced when the molecules are parallel or nearly parallel to the FEL polarization, while the hydrogen fragmentation channel (C2H2+ → C2H+ + H) predominates when the molecule is perpendicular to that direction, thus allowing one to distinguish between the two photochemical processes. The experimental findings are supported by state-of-the art theoretical calculations.
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Affiliation(s)
- L. Varvarezos
- School
of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9, Ireland
| | - J. Delgado-Guerrero
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Advanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
| | - M. Di Fraia
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - T. J. Kelly
- Department
of Computer Science and Applied Physics, Atlantic Technological University, T91 T8NW Galway, Ireland
| | - A. Palacios
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Institute
for Advanced Research in Chimical Sciences, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - C. Callegari
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - A. L. Cavalieri
- Institute
of Applied Physics, University of Bern, 3012 Bern, Switzerland
- Paul
Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - R. Coffee
- Linac
Coherent Light Source/SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - M. Danailov
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - P. Decleva
- Istituto
Officina dei Materiali IOM-CNR and Dipartimento di Scienze Chimiche
e Farmaceutiche, Università degli
Studi di Trieste, 34121 Trieste, Italy
| | - A. Demidovich
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - L. DiMauro
- Department
of Physics, The Ohio State University, Columbus, Ohio 43210, United States
| | - S. Düsterer
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
| | - L. Giannessi
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - W. Helml
- Fakultät
Physik, Technische Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, 44227 Dortmund, Germany
| | - M. Ilchen
- Institut
fur Physik und CINSaT, Universitat Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - R. Kienberger
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - T. Mazza
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - M. Meyer
- European XFEL, Holzkoppel
4, 22869 Schenefeld, Germany
| | - R. Moshammer
- Max-Planck Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - C. Pedersini
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - O. Plekan
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - K. C. Prince
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
- Department
of Chemistry and Biotechnology, Swinburne
University of Technology, Melbourne, Victoria 3122, Australia
| | - A. Simoncig
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
| | - A. Schletter
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - K. Ueda
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - M. Wurzer
- Physics
Department, Technische Universität
München, 85748 Garching, Germany
| | - M. Zangrando
- Elettra-Sincrotrone
Trieste S.C.p.A., Basovizza, 34149 Trieste, Italy
- Istituto
Officina dei Materiali, Consiglio Nazionale
delle Ricerche, 34149 Trieste, Italy
| | - F. Martín
- Departamento
de Química, Módulo 13, Universidad
Autónoma de Madrid, 28049 Madrid, Spain
- Instituto
Madrileño de Estudios Advanzados en Nanociencia, Cantoblanco, 28049 Madrid, Spain
- Condensed
Matter Physics Center, Universidad Autónoma
de Madrid, 28049 Madrid, Spain
| | - J. T. Costello
- School
of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, Dublin 9, Ireland
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13
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Cistaro G, Malakhov M, Esteve-Paredes JJ, Uría-Álvarez AJ, Silva REF, Martín F, Palacios JJ, Picón A. Theoretical Approach for Electron Dynamics and Ultrafast Spectroscopy (EDUS). J Chem Theory Comput 2022; 19:333-348. [PMID: 36480770 PMCID: PMC9835834 DOI: 10.1021/acs.jctc.2c00674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In this manuscript, we present a theoretical framework and its numerical implementation to simulate the out-of-equilibrium electron dynamics induced by the interaction of ultrashort laser pulses in condensed-matter systems. Our approach is based on evolving in real time the density matrix of the system in reciprocal space. It considers excitonic and nonperturbative light-matter interactions. We show some relevant examples that illustrate the efficiency and flexibility of the approach to describe realistic ultrafast spectroscopy experiments. Our approach is suitable for modeling the promising and emerging ultrafast studies at the attosecond time scale that aim at capturing the electron dynamics and the dynamical electron-electron correlations via X-ray absorption spectroscopy.
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Affiliation(s)
- Giovanni Cistaro
- Departamento
de Química, Universidad Autónoma
de Madrid, 28049Madrid, Spain
| | - Mikhail Malakhov
- Departamento
de Química, Universidad Autónoma
de Madrid, 28049Madrid, Spain
| | - Juan José Esteve-Paredes
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049Madrid, Spain
| | | | - Rui E. F. Silva
- Instituto
de Ciencia de Materiales de Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz
3, 28049Madrid, Spain
| | - Fernando Martín
- Departamento
de Química, Universidad Autónoma
de Madrid, 28049Madrid, Spain,Instituto
Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049Madrid, Spain,Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, 28049Madrid, Spain
| | - Juan José Palacios
- Departamento
de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049Madrid, Spain,Condensed
Matter Physics Center (IFIMAC), Universidad
Autónoma de Madrid, 28049Madrid, Spain,Instituto
Nicolás Cabrera, Universidad Autónoma
de Madrid, 28049Madrid, Spain
| | - Antonio Picón
- Departamento
de Química, Universidad Autónoma
de Madrid, 28049Madrid, Spain,
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14
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Manzano-Muñoz A, Yeste J, Ortega MA, Martín F, López A, Rosell J, Castro S, Serrano C, Samitier J, Ramón-Azcón J, Montero J. Microfluidic-based dynamic BH3 profiling predicts anticancer treatment efficacy. NPJ Precis Oncol 2022; 6:90. [PMID: 36456699 PMCID: PMC9715649 DOI: 10.1038/s41698-022-00333-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Accepted: 11/08/2022] [Indexed: 12/04/2022] Open
Abstract
Precision medicine is starting to incorporate functional assays to evaluate anticancer agents on patient-isolated tissues or cells to select for the most effective. Among these new technologies, dynamic BH3 profiling (DBP) has emerged and extensively been used to predict treatment efficacy in different types of cancer. DBP uses synthetic BH3 peptides to measure early apoptotic events ('priming') and anticipate therapy-induced cell death leading to tumor elimination. This predictive functional assay presents multiple advantages but a critical limitation: the cell number requirement, that limits drug screening on patient samples, especially in solid tumors. To solve this problem, we developed an innovative microfluidic-based DBP (µDBP) device that overcomes tissue limitations on primary samples. We used microfluidic chips to generate a gradient of BIM BH3 peptide, compared it with the standard flow cytometry based DBP, and tested different anticancer treatments. We first examined this new technology's predictive capacity using gastrointestinal stromal tumor (GIST) cell lines, by comparing imatinib sensitive and resistant cells, and we could detect differences in apoptotic priming and anticipate cytotoxicity. We then validated µDBP on a refractory GIST patient sample and identified that the combination of dactolisib and venetoclax increased apoptotic priming. In summary, this new technology could represent an important advance for precision medicine by providing a fast, easy-to-use and scalable microfluidic device to perform DBP in situ as a routine assay to identify the best treatment for cancer patients.
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Affiliation(s)
- Albert Manzano-Muñoz
- grid.473715.30000 0004 6475 7299Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - José Yeste
- grid.424736.00000 0004 0536 2369Biosensors for Bioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - María A. Ortega
- grid.424736.00000 0004 0536 2369Biosensors for Bioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain ,Present Address: Vitala Technologies, Barcelona, Spain
| | - Fernando Martín
- grid.473715.30000 0004 6475 7299Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain ,Networking Biomedical Research Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain
| | - Anna López
- grid.424736.00000 0004 0536 2369Biosensors for Bioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Jordi Rosell
- grid.411083.f0000 0001 0675 8654Sarcoma Translational Research Program, Vall d’Hebron Institute of Oncology (VHIO), Hospital Universitario Vall d’Hebron, Vall d’Hebron Barcelona Hospital Campus, Barcelona, Spain
| | - Sandra Castro
- grid.411083.f0000 0001 0675 8654Surgical Oncology Division, Vall d’Hebron University Hospital, Barcelona, Spain
| | - César Serrano
- grid.411083.f0000 0001 0675 8654Sarcoma Translational Research Program, Vall d’Hebron Institute of Oncology (VHIO), Hospital Universitario Vall d’Hebron, Vall d’Hebron Barcelona Hospital Campus, Barcelona, Spain ,grid.411083.f0000 0001 0675 8654Department of Medical Oncology, Vall d’Hebron University Hospital, Barcelona, Spain
| | - Josep Samitier
- grid.473715.30000 0004 6475 7299Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain ,Networking Biomedical Research Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain ,grid.5841.80000 0004 1937 0247Department of Electronics and Biomedical Engineering, Faculty of Physics, University of Barcelona, Barcelona, Spain
| | - Javier Ramón-Azcón
- grid.424736.00000 0004 0536 2369Biosensors for Bioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain ,grid.425902.80000 0000 9601 989XInstitució Catalana de Reserca i Estudis Avançats (ICREA), Passeig de Lluís Companys, 23, E08010 Barcelona, Spain
| | - Joan Montero
- grid.473715.30000 0004 6475 7299Nanobioengineering Group, Institute for Bioengineering of Catalonia (IBEC), Barcelona Institute of Science and Technology (BIST), Barcelona, Spain ,Networking Biomedical Research Center in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, Spain ,grid.5841.80000 0004 1937 0247Present Address: Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Universitat de Barcelona, Casanova 143, Barcelona, 08036 Spain
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15
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Fallaque JG, Rodríguez-González S, Martín F, Díaz C. Self-energy corrected DFT-NEGF for conductance in molecular junctions: an accurate and efficient implementation for TRANSIESTA package applied to Au electrodes. J Phys Condens Matter 2022; 34:435901. [PMID: 35970178 DOI: 10.1088/1361-648x/ac89c4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
In view of the development and the importance that the studies of conductance through molecular junctions is acquiring, robust, reliable and easy-to-use theoretical tools are the most required. Here, we present an efficient implementation of the self-energy correction to density functional theory non-equilibrium Green functions method for TRANSIESTA package. We have assessed the validity of our implementation using as benchmark systems a family of acene complexes with increasing number of aromatic rings and several anchoring groups. Our theoretical results show an excellent agreement with experimentally available measurements assuring the robustness and accuracy of our implementation.
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Affiliation(s)
- Joel G Fallaque
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Sandra Rodríguez-González
- Departamento de Química Física Aplicada, Módulo 14, Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - Fernando Martín
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Cristina Díaz
- Departamento de Química Física, Facultad de CC Químicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
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16
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Del Cueto M, Muzas AS, Martín F, Díaz C. Stereodynamics effects in grazing-incidence fast-molecule diffraction. Phys Chem Chem Phys 2022; 24:19541-19551. [PMID: 35938887 DOI: 10.1039/d2cp02109a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Grazing-incidence fast-projectile diffraction has been proposed both as a complement and an alternative to thermal-energy projectile scattering, which explains the interest that this technique has received in recent years, especially in the case of atomic projectiles. On the other hand, despite the richer physics involved, molecular projectiles have received much less attention. In this work, we present a theoretical study of grazing-incidence fast-molecule diffraction of H2 from KCl(001) using a six-dimensional density functional theory based potential energy surface and a time-dependent wavepacket propagation method. The analysis of the computed diffraction patterns as a function of the molecular alignment, and their comparison with the available experimental data, where the initial distribution of rotational states in the molecule is not known, reveals a puzzling stereodynamics effect of the diffracted projectiles: diffracted molecules aligned perpendicular, or quasi perpendicular, to the surface reproduce rather well the experimental diffraction pattern, whereas those molecules aligned parallel to or tilted with respect to the surface do not behave as in the experiments. These results call for more detailed investigations of the molecular beam generation process.
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Affiliation(s)
- M Del Cueto
- Department of Chemistry, University of Liverpool, Liverpool, L69 3BK, UK
| | - A S Muzas
- Centro de Física de Materiales CFM/MPC (CSIC-UPV/EHU), 20018 Donotia-San Sebastián, Spain
| | - F Martín
- Departamento de Química Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzado en Nanociencia (IMDEA-Nanociencia), Cantoblanco 28049, Madrid, Spain
| | - C Díaz
- Departamento de Química Física, Facultad de CC. Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain.
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17
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Chavez H, Albornoz MB, Martín F. ‘Big data’ Research: A Bibliometric Analysis of the Scopus Database, 2009–2019. JSCIRES 2022. [DOI: 10.5530/jscires.11.1.7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Santiago JL, Rivas E, Gamarra AR, Vivanco MG, Buccolieri R, Martilli A, Lechón Y, Martín F. Estimates of population exposure to atmospheric pollution and health-related externalities in a real city: The impact of spatial resolution on the accuracy of results. Sci Total Environ 2022; 819:152062. [PMID: 34856257 DOI: 10.1016/j.scitotenv.2021.152062] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/25/2021] [Accepted: 11/25/2021] [Indexed: 06/13/2023]
Abstract
Health impacts of atmospheric pollution is an important issue in urban environments. Its magnitude depends on population exposure which have been frequently estimated by considering different approaches relating pollutant concentration and population exposed to it. However, the uncertainties due to the spatial resolution of the model used to estimate the pollutant concentration or due to the lack of representativeness of urban air quality monitoring station (AQMS) have not been evaluated in detail. In this context, NO2 annual average concentration at pedestrian level in the whole city of Pamplona (Spain) modelled at high spatial resolution (~1 m) by Computational Fluid Dynamic (CFD) simulations is used to estimate the total population exposure and health-related externalities by using different approaches. Air pollutant concentration and population are aggregated at different spatial resolutions ranging from a horizontal grid cell size of 100 m × 100 m to a coarser resolution where the whole city is covered by only one cell (6 km × 5 km). In addition, concentrations at AQMS locations are also extracted to assess the representativeness of those AQMS. The case with a spatial resolution of 100 m × 100 m for both pollutant-concentration distribution and population data is used as a reference (Base case) and compared with those obtained with the other approaches. This study indicates that the spatial resolution of concentration and population distribution in the city should be 1 km × 1 km or finer to obtain appropriate estimates of total population exposure (underestimations <13%) and health-related externalities (underestimations <37%). For the cases with coarser resolutions, a strong underestimation of total population exposure (>31%) and health-related externalities (>76%) was found. On the other hand, the use of AQMS concentrations can induce important errors due to the limited spatial representativeness, in particular in terms of population exposure.
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Affiliation(s)
- J L Santiago
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain.
| | - E Rivas
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
| | | | - M G Vivanco
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
| | - R Buccolieri
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, University of Salento, Lecce, Italy
| | - A Martilli
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
| | - Y Lechón
- Department of Energy, CIEMAT, Madrid, Spain
| | - F Martín
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Madrid, Spain
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19
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González-Collado CM, Plésiat E, Decleva P, Palacios A, Martín F. Vibrationally resolved photoelectron angular distributions of ammonia. Phys Chem Chem Phys 2022; 24:7700-7712. [PMID: 35293411 DOI: 10.1039/d2cp00627h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present a theoretical study of vibrationally resolved photoelectron angular distributions for ammonia in both laboratory and molecular frames, in the photon energy range up to 70 eV, where only valence and inner-valence ionization is possible. We focus on the band resulting from ionization of the 3a1 HOMO orbital leading to NH3+ in the electronic ground state, , for which the dominant vibrational progression corresponds to the activation of the umbrella inversion mode. We show that, at room temperature, the photoelectron angular distributions for randomly oriented molecules or molecules whose principal C3 symmetry axis is aligned along the light polarization direction are perfectly symmetric with respect to the plane that contains the intermediate D3h conformation connecting the pyramidal structures associated with the double-well potential of the umbrella inversion mode. These distributions exhibit symmetric, nearly perfect two-lobe shapes in the whole range of investigated photon energies. In contrast, for molecules where the initial vibrational state is localized in one of the two wells, a situation that can experimentally be achieved by introducing an external electric field, the molecular-frame photoelectron angular distributions (MFPADs) are in general asymmetric, but the degree of asymmetry of the two lobes dramatically changes and oscillates with photoelectron energy. We also show that, at ultracold temperatures, where all aligned molecules initially lie in the delocalized ground vibrational state, the photoelectron angular distributions are perfectly symmetric, but the two-lobe shape is only observed when the final vibrational state of the resulting NH3+ cation has even parity. When the latter vibrational state has odd parity, the angular distributions are much more involved and, at photoelectron energies of ∼10 eV, they directly reflect the bi-pyramidal geometry of the molecule in its ground vibrational state. These results suggest that, in order to obtain structural information from MFPADs in ammonia and likely in other molecules containing a similar double-well potential, one could preferably work at ultracold temperatures, which is not the case for most molecules.
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Affiliation(s)
| | - Etienne Plésiat
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
| | - Piero Decleva
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste and CNR-IOM, 34127 Trieste, Italy
| | - Alicia Palacios
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain. .,Institute of Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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20
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Martín F, Carreño A, Mendoza R, Caruana P, Rodríguez F, Bravo M, Benito A, Ferrer-Miralles N, Céspedes MV, Corchero JL. All-in-one biofabrication and loading of recombinant vaults in human cells. Biofabrication 2022; 14. [PMID: 35203066 DOI: 10.1088/1758-5090/ac584d] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 02/24/2022] [Indexed: 11/12/2022]
Abstract
One of the most promising approaches in the drug delivery field is the use of naturally occurring self-assembling protein nanoparticles, such as virus-like particles, bacterial microcompartments or vault ribonucleoprotein particles as drug delivery systems (DDS). Among them, eukaryotic vaults show a promising future due to their structural features, in vitro stability and non-immunogenicity. Recombinant vaults are routinely produced in insect cells and purified through several ultracentrifugations, both tedious and time-consuming processes. As an alternative, this work proposes a new approach and protocols for the production of recombinant vaults in human cells by transient gene expression of a His-tagged version of the Major Vault Protein (MVP-H6), the development of new affinity-based purification processes for such recombinant vaults, and the all-in-one biofabrication and encapsulation of a cargo recombinant protein within such vaults by their co-expression in human cells. Protocols proposed here allow the easy and straightforward biofabrication and purification of engineered vaults loaded with virtually any INT-tagged cargo protein, in very short times, paving the way to faster and easier engineering and production of better and more efficient DDS.
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Affiliation(s)
- Fernando Martín
- Universitat Autonoma de Barcelona, Institut de Biotecnologia i de Biomedicina, Campus Universitari Bellaterra, Bellaterra, Bellaterra, Catalunya, 08193, SPAIN
| | - Aida Carreño
- Universitat Autonoma de Barcelona, Institut de Biotecnologia i de Biomedicina, Campus Universitari Bellaterra, Bellaterra, Bellaterra, Catalunya, 08193, SPAIN
| | - Rosa Mendoza
- CIBER-BBN, Institut de Biotecnologia i de Biomedicina, Campus Universitari Bellaterra, Bellaterra, Bellaterra, 08193, SPAIN
| | - Pablo Caruana
- Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau) Carrer Sant Quintí, 77-79, Barcelona, Catalunya, 08041, SPAIN
| | - Francisco Rodríguez
- Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau) Carrer Sant Quintí, 77-79 08041. Barcelona, Spain, Barcelona, Catalunya, 08041, SPAIN
| | - Marlon Bravo
- Universitat de Girona, Laboratori Enginyeria Proteines, Dept biologia, Universitat de Girona, Girona, Catalunya, 17003, SPAIN
| | - Antoni Benito
- Universitat de Girona, Facultat de Ciències, Universitat de Girona, Campus de Montilivi, Carrer Maria Aurèlia Capmany, 40,, Girona, Catalunya, 17003, SPAIN
| | - Neus Ferrer-Miralles
- Universitat Autonoma de Barcelona, Institut de Biotecnologia i de Biomedicina, Campus Universitari Bellaterra, Bellaterra, Bellaterra, Catalunya, 08193, SPAIN
| | - Mª Virtudes Céspedes
- Hospital de la Santa Creu i Sant Pau, Sant Pau Biomedical Research Institute (IIB Sant Pau) Carrer Sant Quintí, 77-79, Barcelona, Catalunya, 08041, SPAIN
| | - Jose Luis Corchero
- CIBER-BBN, Institut de Biotecnologia i de Biomedicina, Campus Universitari Bellaterra, Bellaterra, 08193, SPAIN
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21
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Cattaneo L, Pedrelli L, Bello RY, Palacios A, Keathley PD, Martín F, Keller U. Isolating Attosecond Electron Dynamics in Molecules where Nuclei Move Fast. Phys Rev Lett 2022; 128:063001. [PMID: 35213184 DOI: 10.1103/physrevlett.128.063001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 12/13/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
Capturing electronic dynamics in real time has been the ultimate goal of attosecond science since its beginning. While for atomic targets the existing measurement techniques have been thoroughly validated, in molecules there are open questions due to the inevitable copresence of moving nuclei, which are not always mere spectators of the phototriggered electron dynamics. Previous work has shown that not only can nuclear motion affect the way electrons move in a molecule, but it can also lead to contradictory interpretations depending on the chosen experimental approach. In this Letter we investigate how nuclear motion affects and eventually distorts the electronic dynamics measured by using two of the most popular attosecond techniques, reconstruction of attosecond beating by interference of two-photon transitions and attosecond streaking. Both methods are employed, in combination with ab initio theoretical calculations, to retrieve photoionization delays in the dissociative ionization of H_{2}, H_{2}→H^{+}+H+e^{-}, in the region of the Q_{1} series of autoionizing states, where nuclear motion plays a prominent role. We find that the experimental reconstruction of attosecond beating by interference of two-photon transitions results are very sensitive to bond softening around the Q_{1} threshold (27.8 eV), even at relatively low infrared (IR) intensity (I_{0}∼1.4×10^{11} W/cm^{2}), due to the long duration of the probe pulse that is inherent to this technique. Streaking, on the other hand, seems to be a better choice to isolate attosecond electron dynamics, since shorter pulses can be used, thus reducing the role of bond softening. This conclusion is supported by very good agreement between our streaking measurements and the results of accurate theoretical calculations. Additionally, the streaking technique offers the necessary energy resolution to accurately retrieve the fast-oscillating phase of the photoionization matrix elements, an essential requirement for extending this technique to even more complicated molecular targets.
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Affiliation(s)
- Laura Cattaneo
- Physics Department, Institute of Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
| | - Luca Pedrelli
- Physics Department, Institute of Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
| | - Roger Y Bello
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley California 94720, USA
| | - Alicia Palacios
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Phillip D Keathley
- Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Ursula Keller
- Physics Department, Institute of Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland
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22
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Ambrosio M, Plesiat E, Decleva P, Echenique P, Díez Muiño R, Martín F. Cluster approach to scattering in MoS2 photoemission. Chem Phys 2022. [DOI: 10.1016/j.chemphys.2022.111476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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23
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Vicente-Mampel J, Bautista IJ, Martín F, Maroto-Izquierdo S, Van Hooren B, Baraja-Vegas L. Effects of ankle position during the Nordic Hamstring exercise on range of motion, heel contact force and hamstring muscle activation. Sports Biomech 2022:1-13. [PMID: 35045792 DOI: 10.1080/14763141.2021.2025416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 12/30/2021] [Indexed: 10/19/2022]
Abstract
One of the main benefits of the Nordic Hamstring Exercise (NHE) is that it can be performed without the need of any extra material. However, numerous technical execution variables such as the ankle and pelvis position can influence the performance. The primary aims of this study were to investigate the effects of ankle position (i.e., plantar or dorsal flexion) on Nordic Hamstring Break Point (NHBP), repetition time and heel contact force. A secondary aim was to investigate differences in biceps femoris long head and semitendinosus muscle activation. Male professional field hockey players (n = 12) volunteered for the study. Paired t-tests were used to analyse the effect of ankle position on muscle NHBP, eccentric peak torque and repetition time. Ankle dorsal flexion resulted in a higher NHBP (p = 0.002, effect size [ES] = 1.48 [0.57 to 2.38]), repetition time (p = 0.004, ES = 0.98 [0.24 to 1.72]) and both absolute and relative heel contact force (p = 0.028, ES = 0.67 [0.01 to 1.34], p = 0.017, ES = 0.76 [0.07 to 1.44], respectively) compared to plantar flexion. Muscle activation was not significant different. This study showed a higher NHBP, absolute and relative heel contact force and repetition time with a dorsal flexed ankle vs. a plantar flexed ankle in the NHE, without changes in hamstrings muscle activation.
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Affiliation(s)
- Juan Vicente-Mampel
- Department of Physiotherapy, Catholic University of Valencia, Torrent, Spain
| | - Iker J Bautista
- Department of Physiotherapy, Catholic University of Valencia, Torrent, Spain
| | - Fernando Martín
- Research Group in Prevention and Health in Exercise and Sport, University of Valencia, Valencia, Spain
| | | | - Bas Van Hooren
- Department of Nutrition and Movement Sciences, Nutrim School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Luis Baraja-Vegas
- Department of Physiotherapy, Catholic University of Valencia, Torrent, Spain
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24
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Fallaque JG, Rodríguez-González S, Díaz C, Martín F. A simple model to engineer single-molecule conductance of acenes by chemical disubstitution. Nanoscale 2022; 14:464-472. [PMID: 34908088 DOI: 10.1039/d1nr06687k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Understanding and controlling electrical conductivity at the single-molecule level is of fundamental importance for the development of new molecular electronic devices. This ideally requires considering the many different options offered by the molecular structure, the nature of the electrodes, and all possible molecule-electrode anchoring configurations, which is experimentally tedious and theoretically very expensive. Here we present a systematic theoretical study of the conductance of di-amino, di-methylthio and di-(4-methylthio)phenyl acenes, from benzene to pentacene, and for all possible distributions of two identical linkers symmetrically placed on opposite sides of the same ring. We show that, for all investigated compounds, the relative variation of the conductance is well explained by the variations of the HOMO energies as predicted by a simple extended-Hückel approach, i.e., without the need for further input from more elaborate calculations. The model predicts quite nicely that diamino acenes are better conductors than their corresponding dimethylthio analogues, and both much better than the di-(4-methylthio)phenyl counterparts, irrespective of the linkers' relative positions. It also predicts, for a given pair of linkers, the variations in the conductance resulting from changing the acene size and/or the relative position of the linkers. These variations can be as large as an order of magnitude, and therefore can be used to engineer molecular conductance. Finally, we show that a similar approach should be useful to predict trends in the relative conductance of a large variety of disubstituted acene isomers, including various linkers.
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Affiliation(s)
- Joel G Fallaque
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049 Madrid, Spain.
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Sandra Rodríguez-González
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Departamento de Química Física, Universidad de Málaga, Campus de Teatinos, 29071 Málaga, Spain
| | - Cristina Díaz
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Departamento de Química Física, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, 28040 Madrid, Spain
| | - Fernando Martín
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049 Madrid, Spain.
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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25
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Barreiro-Lage D, Nicolafrancesco C, Kočišek J, Luna A, Kopyra J, Alcamí M, Huber BA, Martín F, Domaracka A, Rousseau P, Díaz-Tendero S. Controlling the diversity of ion-induced fragmentation pathways by N-methylation of amino acids. Phys Chem Chem Phys 2022; 24:941-954. [PMID: 34913940 DOI: 10.1039/d1cp04097a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We present a combined experimental and theoretical study of the fragmentation of singly and doubly N-methylated glycine (sarcosine and N,N-dimethyl glycine, respectively) induced by low-energy (keV) O6+ ions. Multicoincidence mass spectrometry techniques and quantum chemistry simulations (ab initio molecular dynamics and density functional theory) allow us to characterise different fragmentation pathways as well as the associated mechanisms. We focus on the fragmentation of doubly ionised species, for which coincidence measurements provide unambiguous information on the origin of the various charged fragments. We have found that single N-methylation leads to a larger variety of fragmentation channels than in no methylation of glycine, while double N-methylation effectively closes many of these fragmentation channels, including some of those appearing in pristine glycine. Importantly, the closure of fragmentation channels in the latter case does not imply a protective effect by the methyl group.
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Affiliation(s)
- Darío Barreiro-Lage
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain.
| | - Chiara Nicolafrancesco
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France. .,Synchrotron SOLEIL, LOrme des Merisiers, St Aubin, BP 48, Gif sur Yvette Cedex 91192, France
| | - Jaroslav Kočišek
- J. Heyrovsky Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejskova 3, Prague 18223, Czech Republic
| | - Alberto Luna
- Centro de Computación Científica, Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Janina Kopyra
- Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, Siedlce 08-110, Poland
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Bernd A Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, Caen 14000, France.
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, Madrid 28049, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, Madrid 28049, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid 28049, Spain
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Mishra D, Reino-González J, Obaid R, LaForge AC, Díaz-Tendero S, Martín F, Berrah N. Ultrafast molecular dynamics in ionized 1- and 2-propanol: from simple fragmentation to complex isomerization and roaming mechanisms. Phys Chem Chem Phys 2021; 24:433-443. [PMID: 34897321 DOI: 10.1039/d1cp04011a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Upon photoexcitation, molecules can undergo numerous complex processes, such as isomerization and roaming, leading to changes in the molecular and electronic structure. Here, we report on the time-resolved ultrafast nuclear dynamics, initiated by laser ionization, in the two structural isomers, 1- and 2-propanol, using a combination of pump-probe spectroscopy and coincident Coulomb explosion imaging. Our measurements, paired with quantum chemistry calculations, identify the mechanisms for the observed two- and three-body dissociation channels for both isomers. In particular, the fragmentation channel of 2-propanol associated with the loss of CH3 shows possible evidence of methyl roaming. Moreover, the electronic structure of this roaming methyl fragment could be responsible for the enhanced ionization also observed for this channel. Finally, comparison with similar studies done on ethanol and acetonitrile helps establish a correlation between the length of the alkyl chain and the likelihood of hydrogen migration.
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Affiliation(s)
- Debadarshini Mishra
- Department of Physics, University of Connecticut, Storrs, Connecticut, 06269, USA.
| | - Juan Reino-González
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, EU, Spain
| | - Razib Obaid
- Department of Physics, University of Connecticut, Storrs, Connecticut, 06269, USA.
| | - Aaron C LaForge
- Department of Physics, University of Connecticut, Storrs, Connecticut, 06269, USA.
| | - Sergio Díaz-Tendero
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, EU, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain.,Institute for Advanced Research in Chemical Sciences(IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain
| | - Fernando Martín
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, EU, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049 Madrid, EU, Spain.,Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, EU, Spain
| | - Nora Berrah
- Department of Physics, University of Connecticut, Storrs, Connecticut, 06269, USA.
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27
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Sopena A, Bachau H, Catoire F, Martín F, Palacios A. Selecting two-photon sequential ionization pathways in H 2 through harmonic filtering. Phys Chem Chem Phys 2021; 23:22395-22403. [PMID: 34610062 DOI: 10.1039/d1cp03449a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent experiments in gas-phase molecules have shown the versatility of using attosecond pulse trains combined with IR femtosecond pulses to track and control excitation and ionization yields on the attosecond timescale. The interplay between electron and nuclear motions drives the light-induced transitions favoring specific reaction paths, so that the time delay between the pulses can be used as the tracking parameter or as a control knob to manipulate the molecular dynamics. Here, we present ab initio simulations on the hydrogen molecule to demonstrate that by filtering the high harmonics in an attosecond pulse train one can quench or enhance specific quantum paths thus dictating the outcome of the reaction. It is then possible to discriminate the dominant sequential processes in two-photon ionization, as for example molecular excitation followed by ionization or the other way around. More interestingly, frequency filters can be employed to steer the one- and two-photon yields to favor electron emission in a specific direction.
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Affiliation(s)
- Arturo Sopena
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, Spain.,Centre des Lasers Intenses et Applications, Université de Bordeaux-CNRS-CEA, 33405 Talence Cedex, France
| | - Henri Bachau
- Centre des Lasers Intenses et Applications, Université de Bordeaux-CNRS-CEA, 33405 Talence Cedex, France
| | - Fabrice Catoire
- Centre des Lasers Intenses et Applications, Université de Bordeaux-CNRS-CEA, 33405 Talence Cedex, France
| | - Fernando Martín
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Alicia Palacios
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, Spain.,Institute of Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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28
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Borràs VJ, González-Vázquez J, Argenti L, Martín F. Molecular-Frame Photoelectron Angular Distributions of CO in the Vicinity of Feshbach Resonances: An XCHEM Approach. J Chem Theory Comput 2021; 17:6330-6339. [PMID: 34528784 DOI: 10.1021/acs.jctc.1c00480] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The advent of ultrashort XUV pulses is pushing for the development of accurate theoretical calculations to describe ionization of molecules in regions where electron correlation plays a significant role. Here, we present an extension of the XCHEM methodology to evaluate laboratory- and molecular-frame photoelectron angular distributions in the region where Feshbach resonances are expected to appear. The performance of the method is demonstrated in the CO molecule, for which information on Feshbach resonances is very scarce. We show that photoelectron angular distributions are dramatically affected by the presence of resonances, to the point that they can completely reverse the preferred electron emission direction observed in direct nonresonant photoionization. This is the consequence of significant changes in the electronic structure of the molecule when resonances decay, an effect that is mostly driven by electron correlation in the ionization continuum. The present methodology can thus be helpful for the interpretation of angularly resolved photoionization time delays in this and more complex molecules.
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Affiliation(s)
- Vicent J Borràs
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, Spain
| | | | - Luca Argenti
- Department of Physics and CREOL, University of Central Florida, Orlando, Florida 32186, United States
| | - Fernando Martín
- Departamento de Química, Universidad Autónoma de Madrid, Módulo 13, 28049 Madrid, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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29
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Costa-Roig A, Martín F, Diéguez I, Escrig R, Fonseca R, Barrios JE, Pérez-Tarazona S, López J, Ibáñez I, Gutiérrez C, Vila JJ. Management of congenital and acquired airway pathologies in newborns by a cross-disciplinary committee at a third level hospital. Cir Pediatr 2021; 34:180-185. [PMID: 34606697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
INTRODUCTION Neonatal airway examination through flexible/rigid bronchoscopy has proved to be useful in the presence of persistent stridor and extubation failure, as well as to assess complications following cardiac surgery. At our institution, these examinations are carried out by a pulmonologist, a neonatologist, an otorhinolaryngologist, and a pediatric surgeon from the pediatric airway committee, established in 2014. OBJECTIVE To analyze the airway examinations performed in neonates during their stay at the neonatology/neonatal intensive care unit since the airway committee was established. MATERIAL AND METHODS A retrospective study of the airway examinations conducted in neonates from 2015 to 2019 was carried out. Clinical and demographic data, number of examinations, indications, findings, and complications were collected. Results are presented as mean and standard deviation. Statistical significance was established at p < 0.05. RESULTS 92 airway examinations were analyzed in 51 patients (54.9% of whom were female). 51% of the patients were premature. Extubation failure and persistent respiratory symptoms following successful extubation were the most frequent indications for airway examination (35.3%). Stratification by gestational age or weight at birth was not associated with an increased risk of pathological findings at examination (p > 0.05). The most frequent finding was vocal cord paralysis (n = 14; 27.5%). In 10 patients (19.6%), no pathological findings were observed. CONCLUSION Airway examination is useful in patients with stridor to identify vocal cord paralysis following extubation failure. It also allows congenital airway pathologies to be diagnosed and treated. The number of examinations with no pathological findings was similar to that reported in international series.
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Affiliation(s)
- A Costa-Roig
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - F Martín
- Neonatology Department and Pediatric Neonatal Intensive Care Unit. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - I Diéguez
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - R Escrig
- Neonatology Department and Pediatric Neonatal Intensive Care Unit. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - R Fonseca
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - J E Barrios
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - S Pérez-Tarazona
- Pediatric Pulmonology Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - J López
- Pediatric Pulmonology Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - I Ibáñez
- Pediatric Otorhinolaryngology Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - C Gutiérrez
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
| | - J J Vila
- Pediatric Surgery Department. La Fe University and Polytechnic Hospital. Valencia (Spain)
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30
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Rousseau P, González-Vázquez J, Piekarski DG, Kopyra J, Domaracka A, Alcamí M, Adoui L, Huber BA, Díaz-Tendero S, Martín F. Timing of charge migration in betaine by impact of fast atomic ions. Sci Adv 2021; 7:eabg9080. [PMID: 34597129 PMCID: PMC10938492 DOI: 10.1126/sciadv.abg9080] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
The way molecules break after ion bombardment is intimately related to the early electron dynamics generated in the system, in particular, charge (or electron) migration. We exploit the natural positive-negative charge splitting in the zwitterionic molecule betaine to selectively induce double electron removal from its negatively charged side by impact of fast O6+ ions. The loss of two electrons in this localized region of the molecular skeleton triggers a competition between direct Coulomb explosion and charge migration that is examined to obtain temporal information from ion-ion coincident measurements and nonadiabatic molecular dynamics calculations. We find a charge migration time, from one end of the molecule to the other, of approximately 20 to 40 femtoseconds. This migration time is longer than that observed in molecules irradiated by ultrashort light pulses and is the consequence of charge migration being driven by adiabatic nuclear dynamics in the ground state of the molecular dication.
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Affiliation(s)
- Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Jesús González-Vázquez
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Dariusz G. Piekarski
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Janina Kopyra
- Faculty of Exact and Natural Sciences, Siedlce University of Natural Sciences and Humanities, 3 Maja 54, 08-110 Siedlce, Poland
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nano), Cantoblanco, 28049 Madrid, Spain
| | - Lamri Adoui
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Bernd A. Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000 Caen, France
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA Nano), Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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31
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Ota F, Abe S, Hatada K, Ueda K, Díaz-Tendero S, Martín F. Imaging intramolecular hydrogen migration with time- and momentum-resolved photoelectron diffraction. Phys Chem Chem Phys 2021; 23:20174-20182. [PMID: 34473148 DOI: 10.1039/d1cp02055b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imaging ultrafast hydrogen migration with few- or sub-femtosecond time resolution is a challenge for ultrafast spectroscopy due to the lightness and small scattering cross-section of the moving hydrogen atom. Here we propose time- and momentum-resolved photoelectron diffraction (TMR-PED) as a way to overcome limitations of existing methodologies and illustrate its performance in the ethanol molecule. By combining different theoretical methods, namely molecular dynamics and electron scattering methods, we show that TMR-PED, along with a judicious choice of the reference frame for multi-coincidence detection, allows for direct imaging of single and double hydrogen migration in doubly-charged ethanol with both few-fs and Å resolutions, all the way from its birth to the very end. It also provides hints of proton extraction following H2 roaming. The signature of hydrogen dynamics shows up in polarization-averaged molecular-frame photoelectron angular distributions (PA-MFPADs) as moving features that allow for a straightforward visualization in space.
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Affiliation(s)
- Fukiko Ota
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Shigeru Abe
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Keisuke Hatada
- Department of Physics, University of Toyama, Gofuku 3190, Toyama 930-8555, Japan.
| | - Kiyoshi Ueda
- Department of Chemistry, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan.
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain. .,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain.,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain. .,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, EU, Spain.,Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049 Madrid, EU, Spain
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32
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Ayani CG, Pisarra M, Urgel JI, Navarro JJ, Díaz C, Hayashi H, Yamada H, Calleja F, Miranda R, Fasel R, Martín F, Vázquez de Parga AL. Efficient photogeneration of nonacene on nanostructured graphene. Nanoscale Horiz 2021; 6:744-750. [PMID: 34165121 DOI: 10.1039/d1nh00184a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The on-surface photogeneration of nonacene from α-bisdiketone precursors deposited on nanostructured epitaxial graphene grown on Ru(0001) has been studied by means of low temperature scanning tunneling microscopy and spectroscopy. The presence of an unoccupied surface state, spatially localized in the regions where the precursors are adsorbed, and energetically accessible in the region of the electromagnetic spectrum where n-π* transitions take place, allows for a 100% conversion of the precursors into nonacenes. With the help of state-of-the-art theoretical calculations, we show that such a high yield is due to the effective population of the surface state by the incoming light and the ensuing electron transfer to the unoccupied states of the precursors through an inelastic scattering mechanism. Our findings are the experimental confirmation that surface states can play a prominent role in the surface photochemistry of complex molecular systems, in accordance with early theoretical predictions made on small molecules.
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Affiliation(s)
- Cosme G Ayani
- Dep Física de la Materia Condensada, Universidad Autónoma de Madrid, Cantoblanco 28049, Madrid, Spain.
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33
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Ashfold M, Chergui M, Fischer I, Ge L, Grell G, Ivanov M, Kirrander A, Kornilov O, Krishnan SR, Küpper J, Kuttner C, Makhija V, Martín F, Matsika S, Minns RS, Natan A, Neumark DM, Palacios A, Pratt S, Röder A, Rost JM, Ruberti M, Stolow A, Titov E, Young L. Time-resolved ultrafast spectroscopy: general discussion. Faraday Discuss 2021; 228:329-348. [PMID: 33982724 DOI: 10.1039/d1fd90024b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Delgado J, Lara-Astiaso M, González-Vázquez J, Decleva P, Palacios A, Martín F. Molecular fragmentation as a way to reveal early electron dynamics induced by attosecond pulses. Faraday Discuss 2021; 228:349-377. [PMID: 33571330 DOI: 10.1039/d0fd00121j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We present a theoretical study of the electron and nuclear dynamics that would arise in an attosecond two-color XUV-pump/XUV-probe experiment in glycine. In this scheme, the broadband pump pulse suddenly ionizes the molecule and creates an electronic wave packet that subsequently evolves under the influence of the nuclear motion until it is finally probed by the second XUV pulse. To describe the different steps of such an experiment, we have combined a multi-reference static-exchange scattering method with a trajectory surface hopping approach. We show that by changing the central frequency of the pump pulse, i.e., by engineering the initial electronic wave packet with the pump pulse, one can drive the cation dynamics into a specific fragmentation pathway. Reminiscence of this early electron dynamics can be observed in specific fragmentation channels (not all of them) as a function of the pump-probe delay and in time-resolved photoelectron spectra at specific photoelectron energies. The optimum conditions to visualize the initial electronic coherence in photoelectron and photo-ion spectra depend very much on the characteristics of the pump pulse as well as on the electronic structure of the molecule under study.
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Affiliation(s)
- Jorge Delgado
- Instituto Madrileño de Estudios Avanzados en Nanociencia, 28049 Madrid, Spain
| | - Manuel Lara-Astiaso
- Departamento de Química, Modulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Jesús González-Vázquez
- Departamento de Química, Modulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Piero Decleva
- CNR IOM, Dipartimento di Scienze Chimiche e Farmaceutiche, Universitá di Trieste, 34127 Trieste, Italy
| | - Alicia Palacios
- Departamento de Química, Modulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain. and Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Martín
- Instituto Madrileño de Estudios Avanzados en Nanociencia, 28049 Madrid, Spain and Departamento de Química, Modulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain. and Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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35
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Acheson K, Allum F, Das R, Dixit G, Doan H, Fasshauer E, Ge L, Grell G, Ivanov M, Kornilov O, Küpper J, Kuttner C, Martín F, Maxwell A, Mayer N, Palacios A, Pratt S, Röder A, Rohringer N, Rouzée A, Suzuki T, Titov E, Tremblay JC, Yong H, Young L. Strong-field physics: general discussion. Faraday Discuss 2021; 228:470-487. [PMID: 34018525 DOI: 10.1039/d1fd90025k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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Pereyra CJ, Campo L, Navarrete-Astorga E, Cuevas A, Romero R, Ariosa D, Henríquez R, Muñoz E, Martín F, Ramos-Barrado JR, Dalchiele EA, Marotti RE. Scattering of light by ZnO nanorod arrays. Opt Lett 2021; 46:2360-2363. [PMID: 33988583 DOI: 10.1364/ol.422706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Accepted: 04/19/2021] [Indexed: 06/12/2023]
Abstract
The optical properties of ZnO nanorod (NR) arrays were investigated by optical total transmittance (TT) and diffuse reflectance (DR) spectroscopy in the visible region. The NRs were grown electrochemically in a three-electrode cell over a glass/fluorine-doped tin oxide (FTO) substrate. The mean length, radius, and density of NR samples were characterized by scanning electron microscopy. The results were correlated with the observed optical properties. Since light scattering for these NR arrays is highly dependent on their morphology, therefore, a model for light scattering based in the Mie theory for cylinders was implemented to understand the observed spectra. The mean scattering and extinction cross sections were calculated from the morphology of the samples. They were used to fit the DR spectra. From the fittings, the TT spectra of the samples could be calculated. A good agreement with the experimental results was obtained. This indicates that the implemented model represents well the observed scattering phenomena.
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37
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Bello RY, Martín F, Palacios A. Attosecond laser control of photoelectron angular distributions in XUV-induced ionization of H 2. Faraday Discuss 2021; 228:378-393. [PMID: 33566038 DOI: 10.1039/d0fd00114g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
We investigate how attosecond XUV pump/IR probe schemes can be used to exert control on the ionization dynamics of the hydrogen molecule. The aim is to play with all available experimental parameters in the problem, namely the XUV pump-IR probe delay, the energy and emission direction of the produced photo-ions, as well as combinations of them, to uncover control strategies that can lead to preferential electron ejection directions. We do so by accurately solving the time-dependent Schrödinger equation, with inclusion of both electronic and nuclear motions, as well as the coupling between them. We show that both the IR pulse and the nuclear motion can be used to break the molecular inversion symmetry, thus leading to asymmetric molecular-frame photoelectron angular distributions. The preferential electron emission direction can thus be tuned by varying the pump-probe delay, by choosing specific ranges of proton kinetic energies, or both. We expect that similar control strategies could be used in more complex molecules containing light nuclei.
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Affiliation(s)
- Roger Y Bello
- Lawrence Berkeley National Laboratory, Chemical Sciences, Berkeley, California 94720, USA
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38
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Fallaque JG, Ramos M, Busnengo HF, Martín F, Díaz C. Normal and off-normal incidence dissociative dynamics of O 2(v,J) on ultrathin Cu films grown on Ru(0001). Phys Chem Chem Phys 2021; 23:7768-7776. [PMID: 33000830 DOI: 10.1039/d0cp03979a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dissociative adsorption of molecular oxygen on metal surfaces has long been controversial, mostly due to the spin-triplet nature of its ground state, to possible non-adiabatic effects, such as an abrupt charge transfer from the metal to the molecule, or even to the role played by the surface electronic state. Here, we have studied the dissociative adsorption of O2 on CuML/Ru(0001) at normal and off-normal incidence, from thermal to super-thermal energies, using quasi-classical dynamics, in the framework of the generalized Langevin oscillator model, and density functional theory based on a multidimensional potential energy surface. Our simulations reveal a rather intriguing behavior of dissociative adsorption probabilities, which exhibit normal energy scaling at incidence energies below the reaction barriers and total energy scaling above, irrespective of the reaction channel, either direct dissociation, trapping dissociation, or molecular adsorption. We directly compare our results with existing scanning tunneling spectroscopy and microscopy measurements. From this comparison, we infer that the observed experimental behavior at thermal energies may be due to ligand and strain effects, as already found for super-thermal incidence energies.
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Affiliation(s)
- J G Fallaque
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
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39
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Bautista IJ, Vicente-Mampel J, Baraja-Vegas L, Segarra V, Martín F, Van Hooren B. The effects of the Nordic hamstring exercise on sprint performance and eccentric knee flexor strength: A systematic review and meta-analysis of intervention studies among team sport players. J Sci Med Sport 2021; 24:931-938. [PMID: 33893033 DOI: 10.1016/j.jsams.2021.03.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 02/23/2021] [Accepted: 03/09/2021] [Indexed: 11/19/2022]
Abstract
OBJECTIVES The primary aim of this study was to investigate the effects of the Nordic hamstring exercise (NHE) on sprint performance (i.e., 5, 10 and 20m) and explore associations between study characteristics and sprint outcomes in team sport players. Secondary aims were to (1) investigate the effects of the NHE on eccentric strength of the knee flexors (ESKF) with categorical subgroup analysis to determine differences between recreationally, well-trained individuals and young athletes, (2) determine the relation between ESKF and sprint performance in team sport players, and (3) explore the effect of study characteristics (i.e., weekly volume, time duration and body mass) on ESKF. METHODS Electronic databases were searched until the 20th of June 2020. 17 studies met the inclusion criteria. Random-effects meta-analyses were used to determine the mean difference (MD) or standardized change of mean difference (SCMD) between NHE and control group for sprint time and ESKF, respectively. RESULTS NHE interventions showed a positive effect on sprint performance (-0.04s [-0.08, -0.01]). Sub-group meta-analyses indicated no significant differences in 5 and 20m sprint performance (MDsprint(5m)=-0.02s [-0.10, 0.06]) and (MD sprint(20m)=-0.05s [-0.30, 0.19]), respectively. A significant difference was however found for 10m sprint performance (MDsprint(10m)=-0.06s [-0.10, -0.01]). Meta-analysis on the effects of the NHE on ESKF showed a significant benefit of 0.83 SCMD [0.55, 1.12] in favour of the intervention group. CONCLUSIONS Studies with some concerns or high risk of bias show that training programs involving the NHE can have small beneficial effects on sprint performance in team sport players. Studies with some concerns or high risk of bias showed moderate beneficial effects on ESKF among a sample of relatively untrained individuals. However, for well-trained team sport players, the improvements in ESKF were less consistent, suggesting a higher training intensity during the NHE may be required to induce adaptations.
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Affiliation(s)
- Iker J Bautista
- Department of Physiotherapy, Catholic University of Valencia, Spain.
| | | | | | - Víctor Segarra
- ProElite Performance, CESADE Physiotherapist Clinic, Spain
| | - Fernando Martín
- Department of Physical Education and Sports, University of Valencia, Spain
| | - Bas Van Hooren
- Department of Nutrition and Movement Sciences, UNTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, The Netherlands
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Palomino‐Ruiz L, Rodríguez‐González S, Fallaque JG, Márquez IR, Agraït N, Díaz C, Leary E, Cuerva JM, Campaña AG, Martín F, Millán A, González MT. Single‐Molecule Conductance of 1,4‐Azaborine Derivatives as Models of BN‐doped PAHs. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202014194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Lucía Palomino‐Ruiz
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ) Universidad de Granada 18071 Granada Spain
- Fundación IMDEA Nanociencia 28049 Madrid Spain
| | - Sandra Rodríguez‐González
- Departamento de Química, Módulo 13 Universidad Autónoma de Madrid 28049 Madrid Spain
- Present address: Departamento de Química Física Facultad de Ciencias Universidad de Málaga 29071 Málaga Spain
| | | | - Irene R. Márquez
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ) Universidad de Granada 18071 Granada Spain
- Centro de Instrumentación Científica Universidad de Granada 18071 Granada Spain
| | - Nicolás Agraït
- Fundación IMDEA Nanociencia 28049 Madrid Spain
- Departamento de Física de la Materia Condensada Universidad Autónoma de Madrid 28049 Madrid Spain
- Condensed Matter Physics Center (IFIMAC) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Cristina Díaz
- Departamento de Química, Módulo 13 Universidad Autónoma de Madrid 28049 Madrid Spain
- Present address: Departamento de Química Física Facultad de CC. Químicas Universidad Complutense de Madrid 28040 Madrid Spain
| | | | - Juan M. Cuerva
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ) Universidad de Granada 18071 Granada Spain
| | - Araceli G. Campaña
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ) Universidad de Granada 18071 Granada Spain
| | - Fernando Martín
- Fundación IMDEA Nanociencia 28049 Madrid Spain
- Departamento de Química, Módulo 13 Universidad Autónoma de Madrid 28049 Madrid Spain
- Condensed Matter Physics Center (IFIMAC) Universidad Autónoma de Madrid 28049 Madrid Spain
| | - Alba Millán
- Departamento de Química Orgánica Facultad de Ciencias Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ) Universidad de Granada 18071 Granada Spain
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41
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Aguirre NF, Díaz-Tendero S, Hervieux PA, Alcamí M, Chabot M, Béroff K, Martín F. Charge and energy sharing in the fragmentation of astrophysically relevant carbon clusters. Theor Chem Acc 2021. [DOI: 10.1007/s00214-020-02702-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Palomino-Ruiz L, Rodríguez-González S, Fallaque JG, Márquez IR, Agraït N, Díaz C, Leary E, Cuerva JM, Campaña AG, Martín F, Millán A, González MT. Single-Molecule Conductance of 1,4-Azaborine Derivatives as Models of BN-doped PAHs. Angew Chem Int Ed Engl 2021; 60:6609-6616. [PMID: 33348468 DOI: 10.1002/anie.202014194] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/02/2020] [Indexed: 01/06/2023]
Abstract
The single-molecule conductance of a series of BN-acene-like derivatives has been measured by using scanning tunneling break-junction techniques. A strategic design of the target molecules has allowed us to include azaborine units in positions that unambiguously ensure electron transport through both heteroatoms, which is relevant for the development of customized BN-doped nanographenes. We show that the conductance of the anthracene azaborine derivative is comparable to that of the pristine all-carbon anthracene compound. Notably, this heteroatom substitution has also allowed us to perform similar measurements on the corresponding pentacene-like compound, which is found to have a similar conductance, thus evidencing that B-N doping could also be used to stabilize and characterize larger acenes for molecular electronics applications. Our conclusions are supported by state-of-the-art transport calculations.
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Affiliation(s)
- Lucía Palomino-Ruiz
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, 18071, Granada, Spain.,Fundación IMDEA Nanociencia, 28049, Madrid, Spain
| | - Sandra Rodríguez-González
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Present address: Departamento de Química Física, Facultad de Ciencias, Universidad de Málaga, 29071, Málaga, Spain
| | | | - Irene R Márquez
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, 18071, Granada, Spain.,Centro de Instrumentación Científica, Universidad de Granada, 18071, Granada, Spain
| | - Nicolás Agraït
- Fundación IMDEA Nanociencia, 28049, Madrid, Spain.,Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Cristina Díaz
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Present address: Departamento de Química Física, Facultad de CC. Químicas, Universidad Complutense de Madrid, 28040, Madrid, Spain
| | - Edmund Leary
- Fundación IMDEA Nanociencia, 28049, Madrid, Spain
| | - Juan M Cuerva
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, 18071, Granada, Spain
| | - Araceli G Campaña
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, 18071, Granada, Spain
| | - Fernando Martín
- Fundación IMDEA Nanociencia, 28049, Madrid, Spain.,Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.,Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Alba Millán
- Departamento de Química Orgánica, Facultad de Ciencias, Unidad de Excelencia de Química Aplicada a Biomedicina y Medioambiente (UEQ), Universidad de Granada, 18071, Granada, Spain
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43
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Santiago JL, Borge R, Sanchez B, Quaassdorff C, de la Paz D, Martilli A, Rivas E, Martín F. Estimates of pedestrian exposure to atmospheric pollution using high-resolution modelling in a real traffic hot-spot. Sci Total Environ 2021; 755:142475. [PMID: 33039894 DOI: 10.1016/j.scitotenv.2020.142475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/19/2020] [Accepted: 09/16/2020] [Indexed: 06/11/2023]
Abstract
Atmospheric pollution is a very relevant risk for the human health, in particular in urban environments, where most people lives and high levels of pollution are found. Population exposure is traditionally estimated through concentration recorded at air quality monitoring stations (AQMS) or modelled at a spatial resolution of the order of 1 km2. However, these methodologies have limitations in urban areas where strong gradients of concentration, even in the same street, exist. In addition, the movements of pedestrians make difficult to compute reliable estimates of pollutant concentration to which people are exposed to. In this context, the main objective of this study is to estimate the exposure of pedestrians to ambient nitrogen oxides (NOx) concentrations with high spatial resolution in a real urban traffic hot-spot under different methodologies. To achieve this objective, a novel methodology which combines high-resolution NOx concentrations from computational fluid dynamic (CFD) simulations with the pedestrian flows obtained by pedestrian mobility microsimulations is applied to an urban area of Madrid, Spain. High-resolution maps show pedestrian exposure peaks, at bus stops and crosswalks, that cannot be captured by the simpler methods based on spatial average concentration (SAC) or concentration measured in an AQMS. Total daily exposure obtained is 1.19 · 109 person s μg m-3, while SAC and AQMS concentration methods yielded 9-23% and 30-40% lower values. In conclusion, the proposed methodology allows to determine the areas with higher exposure in order to design local strategies to reduce the impact on human health. In addition, from a more general point of view, the total exposure in the studied area is better estimated by using spatial average concentration than through concentration recorded by AQMS. The assessment of the spatial representative of AQMS becomes necessary to use AQMS concentration to evaluate air quality and population exposure of an urban area.
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Affiliation(s)
- J L Santiago
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain.
| | - R Borge
- Laboratory of Environmental Modelling, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - B Sanchez
- Department of Geography, National University of Singapore, Singapore; Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
| | - C Quaassdorff
- Laboratory of Environmental Modelling, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - D de la Paz
- Laboratory of Environmental Modelling, Universidad Politécnica de Madrid (UPM), Madrid, Spain
| | - A Martilli
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
| | - E Rivas
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
| | - F Martín
- Atmospheric Pollution Division, Environmental Department, CIEMAT, Spain
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44
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Nava-Castañeda Á, Kahuam-López N, De La Fuente Díez Y, Velásco Y Levy A, Sánchez-Bonilla FG, Martín F, Garnica-Hayashi L, Rodriguez-Reyes A. Primary adenoid cystic carcinoma arising from an ectopic lacrimal gland involving both nasal orbits: a rare clinical entity. Orbit 2020; 40:525-528. [PMID: 32912017 DOI: 10.1080/01676830.2020.1817948] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Adenoid cystic carcinoma (ACC) is a slow-growing, locally invasive tumor of epithelial origin. The common sites of origin are the minor and major salivary glands and also the lacrimal glands. ACC accounts for 4.8% of primary orbital neoplasms and commonly arises superolaterally from the main lacrimal gland. Primary ACC of the orbit from an extra lacrimal region is quite rare. We present a case of ACC that occurred in ectopic lacrimal gland tissue involving the medial region of both orbits. A 74-year-old woman was admitted with a 4-week history of progressive painful proptosis in her left eye. Examination revealed a medium-size bilateral nasal canthal mass. Computed tomography (CT) scan revealed a nasal mass in both orbits with bone erosion. The patient underwent bilateral anterior orbitotomy and incisional biopsy was performed. Histopathology exam revealed an ACC with perineural and bone invasion. She refused orbital exenteration and radiation therapy was initiated.
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Affiliation(s)
- Ángel Nava-Castañeda
- Oculoplastics Department, Insituto De Oftalmología Fundación Conde De Valenciana, Mexico City, Mexico
| | - Nicolás Kahuam-López
- Oculoplastics Department, Insituto De Oftalmología Fundación Conde De Valenciana, Mexico City, Mexico
| | - Yesica De La Fuente Díez
- Oculoplastics Department, Insituto De Oftalmología Fundación Conde De Valenciana, Mexico City, Mexico
| | - Adriana Velásco Y Levy
- Oculoplastics Department, Insituto De Oftalmología Fundación Conde De Valenciana, Mexico City, Mexico
| | | | - Fernando Martín
- Oculoplastics Department, Insituto De Oftalmología Fundación Conde De Valenciana, Mexico City, Mexico
| | - Lilia Garnica-Hayashi
- Oculoplastics Department, Insituto De Oftalmología Fundación Conde De Valenciana, Mexico City, Mexico
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45
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McDonnell M, LaForge AC, Reino-González J, Disla M, Kling NG, Mishra D, Obaid R, Sundberg M, Svoboda V, Díaz-Tendero S, Martín F, Berrah N. Ultrafast Laser-Induced Isomerization Dynamics in Acetonitrile. J Phys Chem Lett 2020; 11:6724-6729. [PMID: 32614185 DOI: 10.1021/acs.jpclett.0c01344] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Isomerization induced by laser ionization in acetonitrile (CH3CN) was investigated using pump-probe spectroscopy in combination with ion-ion coincident Coulomb explosion imaging. We deduced five primary channels indicating direct C-C breakup, single and double hydrogen migration, and H and H2 dissociation in the acetonitrile cation. Surprisingly, the hydrogen-migration channels dominate over direct fragmentation. This observation is supported by quantum chemistry calculations showing that isomerization through single and double hydrogen migration leads to very stable linear and ring isomers, with most of them more stable than the original linear structure following ionization of the parent molecule. This is unlike most molecules investigated previously using similar schemes. By varying the delay between the pump and probe pulses, we have also determined the time scales of the corresponding dynamical processes. Isomerization typically occurs in a few hundred femtoseconds, a time scale that is comparable to that found for H and H2 dissociation and direct molecular fragmentation.
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Affiliation(s)
- Matteo McDonnell
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Aaron C LaForge
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Juan Reino-González
- Departamento de Quı́mica, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Martin Disla
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Nora G Kling
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Debadarshini Mishra
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Razib Obaid
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Margaret Sundberg
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
| | - Vít Svoboda
- Laboratory of Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland
| | - Sergio Díaz-Tendero
- Departamento de Quı́mica, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute for Advanced Research in Chemical Sciences(IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Fernando Martín
- Departamento de Quı́mica, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nano), Campus de Cantoblanco, 28049 Madrid, Spain
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
| | - Nora Berrah
- Department of Physics, University of Connecticut, Storrs, Connecticut 06269, United States
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Rousseau P, Piekarski DG, Capron M, Domaracka A, Adoui L, Martín F, Alcamí M, Díaz-Tendero S, Huber BA. Polypeptide formation in clusters of β-alanine amino acids by single ion impact. Nat Commun 2020; 11:3818. [PMID: 32732937 PMCID: PMC7393107 DOI: 10.1038/s41467-020-17653-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Accepted: 07/01/2020] [Indexed: 11/17/2022] Open
Abstract
The formation of peptide bonds by energetic processing of amino acids is an important step towards the formation of biologically relevant molecules. As amino acids are present in space, scenarios have been developed to identify the roots of life on Earth, either by processes occurring in outer space or on Earth itself. We study the formation of peptide bonds in single collisions of low-energy He2+ ions (α-particles) with loosely bound clusters of β-alanine molecules at impact energies typical for solar wind. Experimental fragmentation mass spectra produced by collisions are compared with results of molecular dynamics simulations and an exhaustive exploration of potential energy surfaces. We show that peptide bonds are efficiently formed by water molecule emission, leading to the formation of up to tetrapeptide. The present results show that a plausible route to polypeptides formation in space is the collision of energetic ions with small clusters of amino acids.
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Affiliation(s)
- Patrick Rousseau
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France.
| | - Dariusz G Piekarski
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Michael Capron
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Alicja Domaracka
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Lamri Adoui
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
| | - Fernando Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049, Madrid, Spain
| | - Manuel Alcamí
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA-Nanociencia), Cantoblanco, 28049, Madrid, Spain
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049, Madrid, Spain.
| | - Bernd A Huber
- Normandie Univ, ENSICAEN, UNICAEN, CEA, CNRS, CIMAP, 14000, Caen, France
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Nandi S, Plésiat E, Zhong S, Palacios A, Busto D, Isinger M, Neoričić L, Arnold CL, Squibb RJ, Feifel R, Decleva P, L’Huillier A, Martín F, Gisselbrecht M. Attosecond timing of electron emission from a molecular shape resonance. Sci Adv 2020; 6:eaba7762. [PMID: 32789174 PMCID: PMC7399650 DOI: 10.1126/sciadv.aba7762] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 06/17/2020] [Indexed: 06/11/2023]
Abstract
Shape resonances in physics and chemistry arise from the spatial confinement of a particle by a potential barrier. In molecular photoionization, these barriers prevent the electron from escaping instantaneously, so that nuclei may move and modify the potential, thereby affecting the ionization process. By using an attosecond two-color interferometric approach in combination with high spectral resolution, we have captured the changes induced by the nuclear motion on the centrifugal barrier that sustains the well-known shape resonance in valence-ionized N2. We show that despite the nuclear motion altering the bond length by only 2%, which leads to tiny changes in the potential barrier, the corresponding change in the ionization time can be as large as 200 attoseconds. This result poses limits to the concept of instantaneous electronic transitions in molecules, which is at the basis of the Franck-Condon principle of molecular spectroscopy.
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Affiliation(s)
- S. Nandi
- Department of Physics, Lund University, 22100 Lund, Sweden
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière, F-69622 Villeurbanne, France
| | - E. Plésiat
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - S. Zhong
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - A. Palacios
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Institute of Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - D. Busto
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - M. Isinger
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - L. Neoričić
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - C. L. Arnold
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - R. J. Squibb
- Department of Physics, University of Gothenburg, 41296 Göteborg, Sweden
| | - R. Feifel
- Department of Physics, University of Gothenburg, 41296 Göteborg, Sweden
| | - P. Decleva
- Dipartimento di Scienze Chimiche e Farmaceutiche, Universitá di Trieste and IOM-CNR, 34127 Trieste, Italy
| | - A. L’Huillier
- Department of Physics, Lund University, 22100 Lund, Sweden
| | - F. Martín
- Departamento de Química, Módulo 13, Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Cantoblanco, 28049 Madrid, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, 28049 Madrid, Spain
- Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
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48
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Solís-Cortés D, Navarrete-Astorga E, Schrebler R, Peinado-Pérez JJ, Martín F, Ramos-Barrado JR, Dalchiele EA. A solid-state integrated photo-supercapacitor based on ZnO nanorod arrays decorated with Ag 2S quantum dots as the photoanode and a PEDOT charge storage counter-electrode. RSC Adv 2020; 10:5712-5721. [PMID: 35497434 PMCID: PMC9049565 DOI: 10.1039/c9ra10635a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 01/08/2020] [Indexed: 11/21/2022] Open
Abstract
A planar solid-state photocapacitor with two electrodes has been prepared for the first time using a passivated film of ZnS with Ag2S quantum dots deposited on ZnO nanorods, which were electrochemically grown on ZnO seed layers, as the photoanode. The supercapacitor part is composed of a electrodeposited poly(3,4-ethylene-dioxythiophene) PEDOT film as the counter-electrode and an ionic liquid-based electrolyte between them deposited by the dip coating method. The different nanostructures and electrodes were morphologically and structurally characterized, and the device was electrochemically characterized and could reach a potential of 0.33 V during photocharge and a storage efficiency of 6.83%.
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Affiliation(s)
- D Solís-Cortés
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - E Navarrete-Astorga
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - R Schrebler
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059 Valparaíso Chile
| | - J J Peinado-Pérez
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - F Martín
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - J R Ramos-Barrado
- Universidad de Málaga, Andalucía Tech, Departamentos de Física Aplicada & Ingeniería Química, Laboratorio de Materiales y Superficies (Unidad Asociada al CSIC) E29071 Málaga Spain +34 952131920
| | - E A Dalchiele
- Instituto de Física, Facultad de Ingeniería Herrera y Reissig 565, C.C. 30 11000 Montevideo Uruguay
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49
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Abstract
A simple model based on adjacency matrices is introduced to study the stability of hydrogenated polycyclic aromatic hydrocarbons. Aromaticity governs their relative stability having the most stable isomers the higher number of non-hydrogenated rings.
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Affiliation(s)
- Paula Pla
- Departamento de Química
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - Yang Wang
- School of Chemistry and Chemical Engineering
- Yangzhou University
- Yangzhou
- China
| | - Fernando Martín
- Departamento de Química
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia)
| | - Manuel Alcamí
- Departamento de Química
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia)
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50
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Chang BY, Shin S, González-Vázquez J, Martín F, Malinovsky VS, Sola IR. Control defeasance by anti-alignment in the excited state. Phys Chem Chem Phys 2019; 21:23620-23625. [PMID: 31624812 DOI: 10.1039/c9cp04427b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We predict anti-alignment dynamics in the excited state of H2+ or related homonuclear dimers in the presence of a strong field. This effect is a general indirect outcome of the strong transition dipole and large polarizabilities typically used to control or to induce alignment in the ground state. In the excited state, however, the polarizabilities have the opposite sign compared to those in the ground state, generating a torque that aligns the molecule perpendicular to the field, deeming any laser-control strategy impossible.
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Affiliation(s)
- Bo Y Chang
- School of Chemistry, Seoul National University, Seoul 08826, Republic of Korea
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