1
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Eeckhoudt J, Alonso M, Geerlings P, De Proft F. Bond Lengths and Dipole Moments of Diatomic Molecules under Isotropic Pressure with the XP-PCM and GOSTSHYP Models. J Chem Theory Comput 2024; 20:7430-7442. [PMID: 39189061 DOI: 10.1021/acs.jctc.4c00665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/28/2024]
Abstract
While high-pressure chemistry has a well-established history, methods to simulate pressure at the single-molecule level have been somewhat lacking. The current work aims at comparing two static models (XP-PCM and GOSTSHYP) to apply isotropic pressure to single molecules, focusing on the equilibrium bond length and electric dipole moment of diatomic molecules. Numerical challenges arising in the potential energy surface using the XP-PCM method were examined, and a pragmatic approach was followed to mitigate these. The definition of the cavity was scrutinized, and two approaches to retrieve the isotropic character that could potentially be lost when using the standard methodology were suggested. Subsequently, equilibrium bond lengths under pressure were evaluated, showing reasonable agreement between GOSTSHYP and XP-PCM, but some discrepancies persist. A Taylor series analysis introduced elsewhere was then applied to rationalize the observed trends in terms of the bond surface. Finally, the dipole moment was shown to be highly sensitive to the cavity definition, and qualitative agreement necessitates the use of our adapted procedure.
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Affiliation(s)
- Jochen Eeckhoudt
- Research Group of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Mercedes Alonso
- Research Group of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Paul Geerlings
- Research Group of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Frank De Proft
- Research Group of General Chemistry (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
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2
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Jiang Y, Xiong H, Ying T, Tian G, Chen X, Wei F. Ultrasmall single-layered NbSe 2 nanotubes flattened within a chemical-driven self-pressurized carbon nanotube. Nat Commun 2024; 15:475. [PMID: 38212605 PMCID: PMC10784551 DOI: 10.1038/s41467-023-44677-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Accepted: 12/20/2023] [Indexed: 01/13/2024] Open
Abstract
Pressure can alter interatomic distances and its electrostatic interactions, exerting a profound modifying effect on electron orbitals and bonding patterns. Conventional pressure engineering relies on compressions from external sources, which raises significant challenge in precisely applying pressure on individual molecules and also consume substantial mechanical energy. Here we report ultrasmall single-layered NbSe2 flat tubes (< 2.31 nm) created by self-pressurization during the deselenization of NbSe3 within carbon nanotubes (CNTs). As the internal force (4-17 GPa) is three orders of magnitude larger than the shear strength between CNTs, the flat tube is locked to prevent slippage. Electrical transport measurements indicate that the large pressure within CNTs induces enhanced intermolecular electron correlations. The strictly one-dimensional NbSe2 flat tubes harboring the Luttinger liquid (LL) state, showing a higher tunneling exponent [Formula: see text] than pure CNTs ([Formula: see text]). This work suggests a novel chemical approach to self-pressurization for generating new material configurations and modulating electron interactions.
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Affiliation(s)
- Yaxin Jiang
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Hao Xiong
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Tianping Ying
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China
| | - Guo Tian
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China
| | - Xiao Chen
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China.
- Ordos Laboratory, 017000, Ordos, Inner Mongolia, China.
| | - Fei Wei
- Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, 100084, Beijing, China.
- Ordos Laboratory, 017000, Ordos, Inner Mongolia, China.
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3
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de With G. Melting Is Well-Known, but Is It Also Well-Understood? Chem Rev 2023; 123:13713-13795. [PMID: 37963286 PMCID: PMC10722469 DOI: 10.1021/acs.chemrev.3c00489] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 11/16/2023]
Abstract
Contrary to continuous phase transitions, where renormalization group theory provides a general framework, for discontinuous phase transitions such a framework seems to be absent. Although the thermodynamics of the latter type of transitions is well-known and requires input from two phases, for melting a variety of one-phase theories and models based on solids has been proposed, as a generally accepted theory for liquids is (yet) missing. Each theory or model deals with a specific mechanism using typically one of the various defects (vacancies, interstitials, dislocations, interstitialcies) present in solids. Furthermore, recognizing that surfaces are often present, one distinguishes between mechanical or bulk melting and thermodynamic or surface-mediated melting. After providing the necessary preliminaries, we discuss both types of melting in relation to the various defects. Thereafter we deal with the effect of pressure on the melting process, followed by a discussion along the line of type of materials. Subsequently, some other aspects and approaches are dealt with. An attempt to put melting in perspective concludes this review.
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Affiliation(s)
- Gijsbertus de With
- Laboratory of Physical Chemistry, Eindhoven University of Technology, Het Kranenveld 14, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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4
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Beck N, Gomez Martinez D, Albrecht-Schönzart TE. Pressure-Induced Coordination Number Transition in Lanthanide Mellitate Coordination Polymers: Structure and Spectroscopy. Inorg Chem 2023; 62:15375-15381. [PMID: 37700461 DOI: 10.1021/acs.inorgchem.3c00933] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
High external pressure is found to induce a non-coordinated water molecule to bond to cerium in a previously studied mellitate coordination polymer, as determined by high-pressure single-crystal X-ray diffraction, resulting in a coordination number transition at 3.85 GPa from 9 to 9.5 where half the cerium ions are 10-coordinate. Also, bond length changes due to increased pressure are experimentally measured, whereas the cerium-carboxylate bond lengths overall change by -0.004(9) Å/GPa, the cerium-water bonds by -0.016(3) Å/GPa, and cerium-oxygen bonds overall by -0.010(6) Å/GPa, which corresponds well with theoretical bond length decreases determined for similar compounds. The high-pressure absorbance spectra of the analogous neodymium mellitate are examined and compared with the structural changes observed.
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Affiliation(s)
- Nicholas Beck
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Daniela Gomez Martinez
- Department of Chemistry and Biochemistry, Florida State University, Tallahassee, Florida 32306, United States
| | - Thomas E Albrecht-Schönzart
- Department of Chemistry and Nuclear Science and Engineering Center, Colorado School of Mines, Golden, Colorado 80401, United States
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5
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Tu H, Pan L, Qi H, Zhang S, Li F, Sun C, Wang X, Cui T. Ultrafast dynamics under high-pressure. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2023; 35:253002. [PMID: 36898154 DOI: 10.1088/1361-648x/acc376] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 03/10/2023] [Indexed: 06/18/2023]
Abstract
High-pressure is a mechanical method to regulate the structure and internal interaction of materials. Therefore, observation of properties' change can be realized in a relatively pure environment. Furthermore, high-pressure affects the delocalization of wavefunction among materials' atoms and thus their dynamics process. Dynamics results are essential data for understanding the physical and chemical characteristics, which is valuable for materials application and development. Ultrafast spectroscopy is a powerful tool to investigate dynamics process and becoming a necessary characterization method for materials investigation. The combination of high-pressure with ultrafast spectroscopy in the nanocosecond∼femtosecond scale enables us to investigate the influence of the enhanced interaction between particles on the physical and chemical properties of materials, such as energy transfer, charge transfer, Auger recombination, etc. Base on this point of view, this review summarizes recent progress in the ultrafast dynamics under high-pressure for various materials, in which new phenomena and new mechanisms are observed. In this review, we describe in detail the principles ofin situhigh pressure ultrafast dynamics probing technology and its field of application. On this basis, the progress of the study of dynamic processes under high-pressure in different material systems is summarized. An outlook onin situhigh-pressure ultrafast dynamics research is also provided.
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Affiliation(s)
- Hongyu Tu
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Lingyun Pan
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Hongjian Qi
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Shuhao Zhang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Fangfei Li
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Chenglin Sun
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Xin Wang
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Tian Cui
- School of Physical Science and Technology, Ningbo University, Ningbo 315211, People's Republic of China
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6
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Eeckhoudt J, Bettens T, Geerlings P, Cammi R, Chen B, Alonso M, De Proft F. Conceptual density functional theory under pressure: Part I. XP-PCM method applied to atoms. Chem Sci 2022; 13:9329-9350. [PMID: 36093025 PMCID: PMC9384819 DOI: 10.1039/d2sc00641c] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 07/14/2022] [Indexed: 11/21/2022] Open
Abstract
High pressure chemistry offers the chemical community a range of possibilities to control chemical reactivity, develop new materials and fine-tune chemical properties. Despite the large changes that extreme pressure brings to the table, the field has mainly been restricted to the effects of volume changes and thermodynamics with less attention devoted to electronic effects at the molecular scale. This paper combines the conceptual DFT framework for analyzing chemical reactivity with the XP-PCM method for simulating pressures in the GPa range. Starting from the new derivatives of the energy with respect to external pressure, an electronic atomic volume and an atomic compressibility are found, comparable to their enthalpy analogues, respectively. The corresponding radii correlate well with major known sets of this quantity. The ionization potential and electron affinity are both found to decrease with pressure using two different methods. For the electronegativity and chemical hardness, a decreasing and increasing trend is obtained, respectively, and an electronic volume-based argument is proposed to rationalize the observed periodic trends. The cube of the softness is found to correlate well with the polarizability, both decreasing under pressure, while the interpretation of the electrophilicity becomes ambiguous at extreme pressures. Regarding the electron density, the radial distribution function shows a clear concentration of the electron density towards the inner region of the atom and periodic trends can be found in the density using the Carbó quantum similarity index and the Kullback-Leibler information deficiency. Overall, the extension of the CDFT framework with pressure yields clear periodic patterns.
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Affiliation(s)
- J Eeckhoudt
- General Chemistry Department (ALGC), Vrije Universiteit Brussel (VUB) Brussels Belgium
| | - T Bettens
- General Chemistry Department (ALGC), Vrije Universiteit Brussel (VUB) Brussels Belgium
| | - P Geerlings
- General Chemistry Department (ALGC), Vrije Universiteit Brussel (VUB) Brussels Belgium
| | - R Cammi
- Department of Chemical Science, Life Science and Environmental Sustainability, University of Parma Parma Italy
| | - B Chen
- Donostia International Physics Center Donostia-San Sebastian Spain
- IKERBASQUE, Basque Foundation for Science Plaza Euskadi 5 48009 Bilbao Spain
| | - M Alonso
- General Chemistry Department (ALGC), Vrije Universiteit Brussel (VUB) Brussels Belgium
| | - F De Proft
- General Chemistry Department (ALGC), Vrije Universiteit Brussel (VUB) Brussels Belgium
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7
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Lu W, Liu S, Liu G, Hao K, Zhou M, Gao P, Wang H, Lv J, Gou H, Yang G, Wang Y, Ma Y. Disproportionation of SO_{2} at High Pressure and Temperature. PHYSICAL REVIEW LETTERS 2022; 128:106001. [PMID: 35333084 DOI: 10.1103/physrevlett.128.106001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 12/26/2021] [Accepted: 02/18/2022] [Indexed: 06/14/2023]
Abstract
Materials once suffered at high-pressure and high-temperature (HPHT) conditions often exhibit exotic phenomena that defy conventional wisdom. The behaviors of sulfur dioxide (SO_{2}), one of the archetypal simple molecules, at HPHT conditions have attracted a great deal of attention due to its relevance to the S cycle between deep Earth and the atmosphere. Here we report the discovery of an unexpected disproportionation of SO_{2} via bond breaking into elemental S and sulfur trioxide (SO_{3}) at HPHT conditions through a jointly experimental and theoretical study. Measured x-ray diffraction and Raman spectroscopy data allow us to solve unambiguously the crystal structure (space group R3[over ¯]c) of the resultant SO_{3} phase that shows an extended framework structure formed by vertex-sharing octahedra SO_{6}. Our findings lead to a significant extension of the phase diagram of SO_{2} and suggest that SO_{2}, despite its abundance in Earth's atmosphere and ubiquity in other giant planets, is not a stable compound at HPHT conditions relevant to planetary interiors, providing important implications for elucidating the S chemistry in deep Earth and other giant planets.
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Affiliation(s)
- Wencheng Lu
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Siyu Liu
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Guangtao Liu
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Kun Hao
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Mi Zhou
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Pengyue Gao
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Hongbo Wang
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Jian Lv
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Huiyang Gou
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China
| | - Guochun Yang
- State Key Laboratory of Metastable Materials Science and Technology and Key Laboratory for Microstructural Material Physics of Hebei Province, School of Science, Yanshan University, Qinhuangdao 066004, China
| | - Yanchao Wang
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
| | - Yanming Ma
- State Key Laboratory of Superhard Materials and International Center of Computational Method & Software, College of Physics, Jilin University, Changchun 130012, China
- International Center of Future Science, Jilin University, Changchun 130012, China
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8
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Wu J, González-Cataldo F, Soubiran F, Militzer B. The phase diagrams of beryllium and magnesium oxide at megabar pressures. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2022; 34:144003. [PMID: 35026747 DOI: 10.1088/1361-648x/ac4b2a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
We performab initiosimulations of beryllium (Be) and magnesium oxide (MgO) at megabar pressures and compare their structural and thermodynamic properties. We make a detailed comparison of our two recently derived phase diagrams of Be (Wuet al2021Phys. Rev.B104014103) and MgO (Soubiran and Militzer 2020Phys. Rev. Lett.125175701) using the thermodynamic integration technique, as they exhibit striking similarities regarding their shape. We explore whether the Lindemann criterion can explain the melting temperatures of these materials through the calculation of the Debye temperature at high pressure. From our free energy calculations, we find that the melting line of both materials is well represented by the Simon-Glazel fitTm(P) =T0(1 +P/a)1/c, whereT0= 1564 K,a= 15.8037 GPa andc= 2.4154 for Be, whileT0= 3010 K,a= 10.5797 GPa andc= 2.8683 for the MgO in the B1. For the B2 phase, we use the valuesa= 26.1163 GPa andc= 2.2426. Both materials exhibit negative Clapeyron slopes on the boundaries between the two solid phases that are strongly affected by anharmonic effects, which also influence the location of the solid-solid-liquid triple point. We find that the quasi-harmonic approximation underestimates the stability range of the low-pressure phases, namely hcp for Be and B1 for MgO. We also compute the phonon dispersion relations at low and high pressure for each of the phases of these materials, and also explore how the phonon density of states is modified by temperature. Finally, we derive secondary shock Hugoniot curves in addition to the principal Hugoniot curve for both materials, and study their offsets in pressure between solid and liquid branches.
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Affiliation(s)
- Jizhou Wu
- Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United States of America
| | - Felipe González-Cataldo
- Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United States of America
| | | | - Burkhard Militzer
- Department of Earth and Planetary Science, University of California, Berkeley, CA 94720, United States of America
- Department of Astronomy, University of California, Berkeley, CA 94720, United States of America
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9
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Laniel D, Fedotenko T, Winkler B, Aslandukova A, Aslandukov A, Aprilis G, Chariton S, Milman V, Prakapenka V, Dubrovinsky L, Dubrovinskaia N. A reentrant phase transition and a novel polymorph revealed in high-pressure investigations of CF4 up to 46.5 GPa. J Chem Phys 2022; 156:044503. [DOI: 10.1063/5.0079402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Dominique Laniel
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
| | - Timofey Fedotenko
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
| | - Bjoern Winkler
- Institut für Geowissenschaften, Abteilung Kristallographie, Johann Wolfgang Goethe-Universität Frankfurt, Altenhöferallee 1, D-60438 Frankfurt am Main, Germany
| | - Alena Aslandukova
- Bayerisches Geoinstitut, University of Bayreuth, 95440 Bayreuth, Germany
| | - Andrey Aslandukov
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
| | - Georgios Aprilis
- The European Synchrotron Radiation Facility, 38043 Grenoble Cedex 9, France
| | - Stella Chariton
- Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, USA
| | - Victor Milman
- Dassault Systèmes BIOVIA, CB4 0WN Cambridge, United Kingdom
| | - Vitali Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, USA
| | - Leonid Dubrovinsky
- Bayerisches Geoinstitut, University of Bayreuth, 95440 Bayreuth, Germany
| | - Natalia Dubrovinskaia
- Material Physics and Technology at Extreme Conditions, Laboratory of Crystallography, University of Bayreuth, 95440 Bayreuth, Germany
- Department of Physics, Chemistry and Biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
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10
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Chmiel K, Knapik-Kowalczuk J, Kamińska E, Tajber L, Paluch M. High-Pressure Dielectric Studies-a Way to Experimentally Determine the Solubility of a Drug in the Polymer Matrix at Low Temperatures. Mol Pharm 2021; 18:3050-3062. [PMID: 34250800 PMCID: PMC8397395 DOI: 10.1021/acs.molpharmaceut.1c00264] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
In this work, we
employed broad-band dielectric spectroscopy to
determine the solubility limits of nimesulide in the Kollidon VA64
matrix at ambient and elevated pressure conditions. Our studies confirmed
that the solubility of the drug in the polymer matrix decreases with
increasing pressure, and molecular dynamics controls the process of
recrystallization of the excess of amorphous nimesulide from the supersaturated
drug–polymer solution. More precisely, recrystallization initiated
at a certain structural relaxation time of the sample stops when a
molecular mobility different from the initial one is reached, regardless
of the temperature and pressure conditions. Finally, based on the
presented results, one can conclude that by transposing vertically
the results obtained at elevated pressures, one can obtain the solubility
limit values corresponding to low temperatures. This approach was
validated by the comparison of the experimentally determined points
with the theoretically obtained values based on the Flory–Huggins
theory.
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Affiliation(s)
- Krzysztof Chmiel
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Justyna Knapik-Kowalczuk
- Institute of Physics, Faculty of Science and Technology, University of Silesia, SMCEBI, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Ewa Kamińska
- Department of Pharmacognosy and Phytochemistry, Faculty of Pharmaceutical Sciences in Sosnowiec, Medical University of Silesia in Katowice, ul. Jagiellońska 4, 41-200 Sosnowiec, Poland
| | - Lidia Tajber
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, 2 Dublin, Ireland
| | - Marian Paluch
- Institute of Physics, Faculty of Science and Technology, University of Silesia, SMCEBI, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
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11
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Gale A, Hruska E, Liu F. Quantum chemistry for molecules at extreme pressure on graphical processing units: Implementation of extreme-pressure polarizable continuum model. J Chem Phys 2021; 154:244103. [PMID: 34241353 DOI: 10.1063/5.0056480] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Pressure plays essential roles in chemistry by altering structures and controlling chemical reactions. The extreme-pressure polarizable continuum model (XP-PCM) is an emerging method with an efficient quantum mechanical description of small- and medium-sized molecules at high pressure (on the order of GPa). However, its application to large molecular systems was previously hampered by a CPU computation bottleneck: the Pauli repulsion potential unique to XP-PCM requires the evaluation of a large number of electric field integrals, resulting in significant computational overhead compared to the gas-phase or standard-pressure polarizable continuum model calculations. Here, we exploit advances in graphical processing units (GPUs) to accelerate the XP-PCM-integral evaluations. This enables high-pressure quantum chemistry simulation of proteins that used to be computationally intractable. We benchmarked the performance using 18 small proteins in aqueous solutions. Using a single GPU, our method evaluates the XP-PCM free energy of a protein with over 500 atoms and 4000 basis functions within half an hour. The time taken by the XP-PCM-integral evaluation is typically 1% of the time taken for a gas-phase density functional theory (DFT) on the same system. The overall XP-PCM calculations require less computational effort than that for their gas-phase counterpart due to the improved convergence of self-consistent field iterations. Therefore, the description of the high-pressure effects with our GPU-accelerated XP-PCM is feasible for any molecule tractable for gas-phase DFT calculation. We have also validated the accuracy of our method on small molecules whose properties under high pressure are known from experiments or previous theoretical studies.
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Affiliation(s)
- Ariel Gale
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
| | - Eugen Hruska
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
| | - Fang Liu
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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12
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Lei J, Lim J, Kim M, Yoo CS. Crystal Structure of Symmetric Ice X in H 2O-H 2 and H 2O-He under Pressure. J Phys Chem Lett 2021; 12:4707-4712. [PMID: 33979522 DOI: 10.1021/acs.jpclett.1c00606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Ice VII and ice X are the two most dominant phases, stable over a large pressure range between 2 and 150 GPa and made of fundamentally different chemical bonding. Yet, the two ice phases share a similar bcc-based crystal structure and lattice constants, resulting in a challenge to discern the crystal structure of ice VII and ice X. Here, we present well-resolved X-ray diffraction data of H2O in quasi-hydrostatic H2 and He pressure media, clearly resolving the two ice phases to 130 GPa and the dissociative nature of ice VII to X transition occurring at 20-50 GPa in H2O-H2 and 60-70 GPa in H2O-He. The present diffraction data permits, for the first time, the accurate determination of the bulk moduli B0 of 225 (or 228) GPa for ice X and 6.2 (or 4.5) GPa for ice VII, in H2O-H2 (or H2O-He), which can provide new constraints for Giant planetary models.
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Affiliation(s)
- Jialin Lei
- Institute of Shock Physics and Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Jinhyuk Lim
- Institute of Shock Physics and Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Minseob Kim
- Institute of Shock Physics and Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Choong-Shik Yoo
- Institute of Shock Physics and Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
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13
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Affiliation(s)
- F. N. El-Gammal
- Mathematics Department, Faculty of Science, Menofia University, Shebin El-Kom, Egypt
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14
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Zhour K, Otero-Mato JM, Hassan FEH, Fahs H, Vaezzadeh M, López-Lago E, Gallego LJ, Varela LM. Tuning the hybrid borophene−/graphene-ionic liquid interface: Effect of metal cations on the electronic and photonic properties. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114759] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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15
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Lahiri D, Dwivedi A, Vasanthi R, Jha SN, Garg N. First high-pressure XAFS results at the bending-magnet-based energy-dispersive XAFS beamline BL-8 at the Indus-2 synchrotron facility. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:988-998. [PMID: 33566008 DOI: 10.1107/s1600577520006098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2020] [Accepted: 05/04/2020] [Indexed: 06/12/2023]
Abstract
The static focusing optics of the existing energy-dispersive XAFS beamline BL-8 have been advantageously exploited to initiate diamond anvil cell based high-pressure XANES experiments at the Indus-2 synchrotron facility, India. In the framework of the limited photon statistics with the 2.5 GeV bending-magnet source, limited focusing optics and 4 mm-thick diamond windows of the sample cell, a (non-trivial) beamline alignment method for maximizing photon statistics at the sample position has been designed. Key strategies include the selection of a high X-ray energy edge, the truncation of the smallest achievable focal spot size to target size with a slit and optimization of the horizontal slit position for transmission of the desired energy band. A motor-scanning program for precise sample centering has been developed. These details are presented with rationalization for every step. With these strategies, Nb K-edge XANES spectra for Nb2O5 under high pressure (0-16.9 GPa) have been generated, reproducing the reported spectra for Nb2O5 under ambient conditions and high pressure. These first HPXANES results are reported in this paper. The scope of extending good data quality to the EXAFS range in the future is addressed. This work should inspire and guide future high-pressure XAFS experiments with comparable infrastructure.
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Affiliation(s)
- Debdutta Lahiri
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ashutosh Dwivedi
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - R Vasanthi
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S N Jha
- Atomic and Molecular Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Nandini Garg
- High Pressure and Synchrotron Radiation Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India
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16
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Xu Y, Zhang W, Zhang T, Guo W, Lü Y. Amorphous polymerization of nitrogen in compressed cupric azide. J Comput Chem 2020; 41:1026-1033. [PMID: 31970817 DOI: 10.1002/jcc.26150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/03/2020] [Indexed: 01/07/2023]
Abstract
Metal azides have attracted increasing attention as precursors for synthesizing polymeric nitrogen. In this article, we report the amorphous polymerization of nitrogen by compressing cupric azide. The ab initio molecular dynamics simulations show that crystalline cupric azide transforms into a disordered network composed of singly bonded nitrogen at a hydrostatic pressure of 40 GPa and room temperature. The transformation manifests the formation of a π delocalization along the disordered Cu-N network, thus resulting in a semiconductor-metal transition. The estimated heat of formation of the amorphous polymeric nitrogen system is comparable to conventional high-energy-density materials. The amorphization provides an alternative route to the polymerization of nitrogen under moderate conditions.
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Affiliation(s)
- Yujia Xu
- School of Physics, Beijing Institute of Technology, Beijing, People's Republic of China
| | - Weijing Zhang
- State Key Laboratory of Explosion Science and Technology, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, People's Republic of China
| | - Tonglai Zhang
- State Key Laboratory of Explosion Science and Technology, School of Mechatronical Engineering, Beijing Institute of Technology, Beijing, People's Republic of China
| | - Wei Guo
- School of Physics, Beijing Institute of Technology, Beijing, People's Republic of China
| | - Yongjun Lü
- School of Physics, Beijing Institute of Technology, Beijing, People's Republic of China
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17
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18
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Lee MS, Kim Y. Mulberry Fruit Extract Ameliorates Adipogenesis via Increasing AMPK Activity and Downregulating MicroRNA-21/143 in 3T3-L1 Adipocytes. J Med Food 2020; 23:266-272. [PMID: 32191574 DOI: 10.1089/jmf.2019.4654] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Mulberry (Morus alba L.) fruits have long been used in traditional medicine and as edible berries in many countries. This study investigated the antiadipogenic effect of high hydrostatic pressure mulberry fruit extract (MFE) during 3T3-L1 adipocyte differentiation. MFE decreased lipid and triglyceride accumulation and glycerol-3-phosphate dehydrogenase activity. The mRNA expression levels of genes related to adipogenesis, such as the adipocyte protein 2, proliferator-activated receptor-γ, and CCAAT/enhancer binding protein-α, were suppressed by MFE. They also reduced microRNA (miR)-21 and miR-143 expression, which are involved in adipogenesis. In contrast, adenosine monophosphate-activated protein kinase (AMPK) activity was increased by MFE. These results suggested that MFE may suppress adipogenesis through modulating miR-21/143 expression and AMPK activity in 3T3-L1 adipocytes, which may be useful as antiobesity food agents.
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Affiliation(s)
- Mak-Soon Lee
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul, Korea
| | - Yangha Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul, Korea
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19
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Huang HT, Zhu L, Ward MD, Wang T, Chen B, Chaloux BL, Wang Q, Biswas A, Gray JL, Kuei B, Cody GD, Epshteyn A, Crespi VH, Badding JV, Strobel TA. Nanoarchitecture through Strained Molecules: Cubane-Derived Scaffolds and the Smallest Carbon Nanothreads. J Am Chem Soc 2020; 142:17944-17955. [PMID: 31961671 DOI: 10.1021/jacs.9b12352] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Relative to the rich library of small-molecule organics, few examples of ordered extended (i.e., nonmolecular) hydrocarbon networks are known. In particular, sp3 bonded, diamond-like materials represent appealing targets because of their desirable mechanical, thermal, and optical properties. While many covalent organic frameworks (COFs)-extended, covalently bonded, and porous structures-have been realized through molecular architecture with exceptional control, the design and synthesis of dense, covalent extended solids has been a longstanding challenge. Here we report the preparation of a sp3-bonded, low-dimensional hydrocarbon synthesized via high-pressure, solid-state diradical polymerization of cubane (C8H8), which is a saturated, but immensely strained, cage-like molecule. Experimental measurements show that the obtained product is crystalline with three-dimensional order that appears to largely preserve the basic structural topology of the cubane molecular precursor and exhibits high hardness (comparable to fused quartz) and thermal stability up to 300 °C. Among the plausible theoretical candidate structures, one-dimensional carbon scaffolds comprising six- and four-membered rings that pack within a pseudosquare lattice provide the best agreement with experimental data. These diamond-like molecular rods with extraordinarily small thickness are among the smallest members in the carbon nanothread family, and calculations indicate one of the stiffest one-dimensional systems known. These results present opportunities for the synthesis of purely sp3-bonded extended solids formed through the strain release of saturated molecules, as opposed to only unsaturated precursors.
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Affiliation(s)
| | - Li Zhu
- Geophysical Laboratory, Carnegie Institution for Science, 5251 Broad Branch Road Northwest, Washington, DC 20015, United States
| | - Matthew D Ward
- Geophysical Laboratory, Carnegie Institution for Science, 5251 Broad Branch Road Northwest, Washington, DC 20015, United States
| | | | | | - Brian L Chaloux
- Chemistry Division, U.S. Naval Research Laboratory, Washington, DC 20375, United States
| | - Qianqian Wang
- Geophysical Laboratory, Carnegie Institution for Science, 5251 Broad Branch Road Northwest, Washington, DC 20015, United States
| | | | | | | | - George D Cody
- Geophysical Laboratory, Carnegie Institution for Science, 5251 Broad Branch Road Northwest, Washington, DC 20015, United States
| | - Albert Epshteyn
- Chemistry Division, U.S. Naval Research Laboratory, Washington, DC 20375, United States
| | | | | | - Timothy A Strobel
- Geophysical Laboratory, Carnegie Institution for Science, 5251 Broad Branch Road Northwest, Washington, DC 20015, United States
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20
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Fu Z, Wang K, Zou B. Recent advances in organic pressure-responsive luminescent materials. CHINESE CHEM LETT 2019. [DOI: 10.1016/j.cclet.2019.08.041] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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21
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Aswathappa S, Dhas Sathiyadhas SJ, Settu B, Sathiyadhas Amalapushpam MBD. Effect of shock waves on structural and dielectric properties of ammonium dihydrogen phosphate crystal. Z KRIST-CRYST MATER 2019. [DOI: 10.1515/zkri-2018-2159] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this research article, the authors pay attention to investigate the effect of structural and dielectric properties of ammonium dihydrogen phosphate (ADP) crystal under pre and post shock loaded conditions. A shock wave of Mach number 1.9 was utilized for the present investigation which was generated by a table-top pressure driven shock tube. The crystalline nature and grain size variations were estimated by powder X-ray diffraction technique. The grain size of post shock wave loaded ADP crystal is found to be larger than that of the pre shock wave loaded ADP crystal. The dielectric properties of the pre and post shock loaded crystals were analyzed by impedance analyzer as a function of frequency (1 kHz–1 MHz) at ambient temperature. The dielectric constant is observed to be varying from 346 to 362 at the frequency of 400 kHz for pre and post shock wave loaded ADP crystals, respectively. The obtained results suggest that shock waves can be an alternate tool to tailor the physical properties of materials without creating any change in the original crystal system and surface morphology.
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Affiliation(s)
- Sivakumar Aswathappa
- Department of Physics, Abraham Panampara Research Center , Sacred Heart College (Autonomous) , Tirupattur , Vellore, Tamilnadu 635601 , India
| | | | - Balachandar Settu
- Department of Research and Development , AKSH Optifiber Private Limited , Bhiwadi, Rajasthan 301019 , India
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22
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Chmiel K, Knapik-Kowalczuk J, Paluch M. How does the high pressure affects the solubility of the drug within the polymer matrix in solid dispersion systems. Eur J Pharm Biopharm 2019; 143:8-17. [PMID: 31398439 DOI: 10.1016/j.ejpb.2019.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Revised: 07/18/2019] [Accepted: 08/05/2019] [Indexed: 12/13/2022]
Abstract
In this paper, we employed Broadband Dielectric Spectroscopy (BDS) in order to determine the effect of the high pressure on the solubility limits of the amorphous flutamide within Kollidon VA64 matrix. In order to achieve this goal, drug-polymer systems have been examined: (i) at ambient pressure and both isothermal and nonisothermal conditions by means of BDS as well as Differential Scanning Calorimetry (DSC), to validate proposed method; (ii) at high pressure conditions (20 and 50 MPa) and elevated temperatures (343 K, 353 K and 363 K) by means of dielectric spectroscopy. Our studies revealed that regardless of applied pressure the solubility of the flutamide within the co-polymer matrix increases with increasing temperature at isobar conditions. Moreover, our results clearly indicate that with increasing pressure the solubility of the drug within the polymer matrix is decreasing at isothermal conditions. Therefore, during the solubility limit studies one should consider the situation in which by increasing the pressure (at constant temperature) would achieve an effect similar to the lowering of the temperature (at constant pressure).
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Affiliation(s)
- K Chmiel
- Institute of Physics, University of Silesia, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland; Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland.
| | - J Knapik-Kowalczuk
- Institute of Physics, University of Silesia, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland; Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - M Paluch
- Institute of Physics, University of Silesia, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland; Silesian Center for Education and Interdisciplinary Research, ul. 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
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23
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Be̅rziņš K, Fraser-Miller SJ, Rades T, Gordon KC. Low-Frequency Raman Spectroscopic Study on Compression-Induced Destabilization in Melt-Quenched Amorphous Celecoxib. Mol Pharm 2019; 16:3678-3686. [DOI: 10.1021/acs.molpharmaceut.9b00557] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ka̅rlis Be̅rziņš
- The Dodd-Walls Centre for Photonic and Quantum Technologies, Department of Chemistry, University of Otago, Dunedin 9016, New Zealand
| | - Sara J. Fraser-Miller
- The Dodd-Walls Centre for Photonic and Quantum Technologies, Department of Chemistry, University of Otago, Dunedin 9016, New Zealand
| | - Thomas Rades
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen 1165, Denmark
- Faculty of Science and Engineering, Åbo Akademi University, Turku 20500, Finland
| | - Keith C. Gordon
- The Dodd-Walls Centre for Photonic and Quantum Technologies, Department of Chemistry, University of Otago, Dunedin 9016, New Zealand
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24
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Meyer B, Barthel S, Mace A, Vannay L, Guillot B, Smit B, Corminboeuf C. DORI Reveals the Influence of Noncovalent Interactions on Covalent Bonding Patterns in Molecular Crystals Under Pressure. J Phys Chem Lett 2019; 10:1482-1488. [PMID: 30865472 PMCID: PMC6452419 DOI: 10.1021/acs.jpclett.9b00220] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The study of organic molecular crystals under high pressure provides fundamental insight into crystal packing distortions and reveals mechanisms of phase transitions and the crystallization of polymorphs. These solid-state transformations can be monitored directly by analyzing electron charge densities that are experimentally obtained at high pressure. However, restricting the analysis to the featureless electron density does not reveal the chemical bonding nature and the existence of intermolecular interactions. This shortcoming can be resolved by the use of the DORI (density overlap region indicator) descriptor, which is capable of simultaneously detecting both covalent patterns and noncovalent interactions from electron density and its derivatives. Using the biscarbonyl[14]annulene crystal under pressure as an example, we demonstrate how DORI can be exploited on experimental electron densities to reveal and monitor changes in electronic structure patterns resulting from molecular compression. A novel approach based on a flood-fill-type algorithm is proposed for analyzing the topology of the DORI isosurface. This approach avoids the arbitrary selection of DORI isovalues and provides an intuitive way to assess how compression packing affects covalent bonding in organic solids.
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Affiliation(s)
- Benjamin Meyer
- Laboratory
for Computational Molecular Design (LCMD), Institute of Chemical Sciences
and Engineering (ISIC), École Polytechnique
Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- National
Center for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale
de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Senja Barthel
- National
Center for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale
de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Laboratory
of Molecular Simulation (LSMO), Institute of Chemical Sciences and
Engineering (ISIC), École Polytechnique
Fédérale de Lausanne (EPFL Valais), CH-1951 Sion, Switzerland
| | - Amber Mace
- National
Center for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale
de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Laboratory
of Molecular Simulation (LSMO), Institute of Chemical Sciences and
Engineering (ISIC), École Polytechnique
Fédérale de Lausanne (EPFL Valais), CH-1951 Sion, Switzerland
- Department
of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - Laurent Vannay
- Laboratory
for Computational Molecular Design (LCMD), Institute of Chemical Sciences
and Engineering (ISIC), École Polytechnique
Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Benoit Guillot
- Laboratoire
CRM2, UMR 7036, Université de Lorraine, F-54506 Vandoeuvre-lès-Nancy, France
| | - Berend Smit
- National
Center for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale
de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- Laboratory
of Molecular Simulation (LSMO), Institute of Chemical Sciences and
Engineering (ISIC), École Polytechnique
Fédérale de Lausanne (EPFL Valais), CH-1951 Sion, Switzerland
| | - Clémence Corminboeuf
- Laboratory
for Computational Molecular Design (LCMD), Institute of Chemical Sciences
and Engineering (ISIC), École Polytechnique
Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- National
Center for Computational Design and Discovery of Novel Materials (MARVEL), École Polytechnique Fédérale
de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- E-mail: . Tel: +41 (0)21 693 93 57. Fax: +41 (0)21 693
97 00
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25
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Konan KV, Le TC, Mateescu MA. Precompression of dry vegetal bioactive agents to optimize density and compactness: Case of Peschiera fuchsiaefolia powdered materials. POWDER TECHNOL 2019. [DOI: 10.1016/j.powtec.2019.02.038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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26
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Wang Y, Zhang X, Jiang S, Geballe ZM, Pakornchote T, Somayazulu M, Prakapenka VB, Greenberg E, Goncharov AF. Helium-hydrogen immiscibility at high pressures. J Chem Phys 2019; 150:114504. [DOI: 10.1063/1.5086270] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Affiliation(s)
- Yu Wang
- Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
- University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Xiao Zhang
- Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
- University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
| | - Shuqing Jiang
- Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Zachary M. Geballe
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, District of Columbia 20015, USA
| | - Teerachote Pakornchote
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, District of Columbia 20015, USA
- Department of Physics, Chulalongkorn University, Bangkok 10330, Thailand
| | - Maddury Somayazulu
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, District of Columbia 20015, USA
| | - Vitali B. Prakapenka
- Center for Advanced Radiations Sources, University of Chicago, Chicago, Illinois 60637, USA
| | - Eran Greenberg
- Center for Advanced Radiations Sources, University of Chicago, Chicago, Illinois 60637, USA
| | - Alexander F. Goncharov
- Key Laboratory of Materials Physics and Center for Energy Matter in Extreme Environments, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
- University of Science and Technology of China, Hefei, Anhui 230026, People’s Republic of China
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road, Washington, District of Columbia 20015, USA
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27
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Zhang J, Chen G, Dong J, Gong X. Effects of Electronic Delocalization and Hydrostatic Compression on Structure and Properties of Cage Compound 4‐Trinitroethyl‐2,6,8,10,12‐pentanitrohexaazaisowurtzitane. ChemistrySelect 2019. [DOI: 10.1002/slct.201801792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jian‐ying Zhang
- College of Material and Chemical EngineeringChuZhou University, ChuZhou 239000 Anhui China
| | - Gang‐ling Chen
- College of Material and Chemical EngineeringChuZhou University, ChuZhou 239000 Anhui China
| | - Jie Dong
- College of Material and Chemical EngineeringChuZhou University, ChuZhou 239000 Anhui China
| | - Xue‐dong Gong
- School of Chemical EngineeringNanjing University of Science & Technology 210094 Jiangsu China
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28
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Zurek E, Bi T. High-temperature superconductivity in alkaline and rare earth polyhydrides at high pressure: A theoretical perspective. J Chem Phys 2019; 150:050901. [DOI: 10.1063/1.5079225] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Affiliation(s)
- Eva Zurek
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
| | - Tiange Bi
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
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29
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Kumar P, Liu J, Motlag M, Tong L, Hu Y, Huang X, Bandopadhyay A, Pati SK, Ye L, Irudayaraj J, Cheng GJ. Laser Shock Tuning Dynamic Interlayer Coupling in Graphene-Boron Nitride Moiré Superlattices. NANO LETTERS 2019; 19:283-291. [PMID: 30525695 DOI: 10.1021/acs.nanolett.8b03895] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In the emergence of graphene and many two-dimensional (2D) materials, the most exciting applications come from stacking them into 3D devices, promising many excellent possibilities for neoteric electronics and optoelectronics. Layers of semiconductors, insulators, and conductors can be stacked to form van der Waals heterostructures, after the weak bonds formed between the layers. However, the interlayer coupling in these heterostructures is usually hard to modulate, resulting in difficulty to realize their emerging optical or electronic properties. Especially, the relationship between interlayer distance and interlayer coupling remains to be investigated, due to the lack of effective technology. In this work, we have used laser shocking to controllably tune the interlayer distance between graphene (Gr) and boron nitride (BN) in the Gr/BN/Gr heterostructures and the strains in the 2D heterolayers, providing a simple and effective way to modify their optic and electronic properties. After lase shocking, the reduction of interlayer distance is calculated by molecular dynamics (MD) simulation. Some atoms in Gr or BN are out-of-plane as well. In Raman measurements, the G peak in the heterostructure shows a red-shifted trend after laser shocking, indicating the strong phonon coupling in the interlayer. Moreover, the larger transparency after laser shocking also verifies the stronger photon coupling in the heterostructure. To investigate the effects of the interlayer coupling of heterostructure on its out-of-plane electronic behavior, we have investigated the electronic tunneling behavior. The heterostructure after laser shock reveals a lager tunneling current and lower tunneling threshold, proving an unexpected better electrical property. From DFT calculations, laser shocking can modulate the band gap structure of graphene in Gr/BN/Gr heterostructures; therefore, the heterostructures can be implemented as a unique photonic platform to modulate the emission characters of the anchored CdSe/ZnS core-shell quantum dots. Remarkably, the effective laser shocking method is also applicable to various otherwise noninteracting 2D materials, resulting in many new phenomena, which will lead science and technology to unexplored territories.
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Affiliation(s)
- Prashant Kumar
- Department of Physics , Indian Institute of Technology Patna , Bihta Campus, Bihta , Bihar 801106 , India
| | - Jing Liu
- Indiana University-Purdue University Indianapolis , Indianapolis , Indiana 46202 , United States
| | | | - Lei Tong
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Luoyu Road 1037 , Wuhan 430074 , China
| | - Yaowu Hu
- University at Buffalo-SUNY , 3435 Main Street , Buffalo , New York 14214 , United States
| | - Xinyu Huang
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Luoyu Road 1037 , Wuhan 430074 , China
| | - Arkamita Bandopadhyay
- Theoretical Sciences Unit , Jawaharlal Nehru Centre for Advanced Scientific Research , Bangalore 560064 , India
- University of Pennsylvania , Philadelphia , Pennsylvania 19104 , United States
| | - Swapan K Pati
- Theoretical Sciences Unit , Jawaharlal Nehru Centre for Advanced Scientific Research , Bangalore 560064 , India
| | - Lei Ye
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Luoyu Road 1037 , Wuhan 430074 , China
| | - Joseph Irudayaraj
- University of Illinois at Urbana-Champaign , 1304 West Springfield Ave, Urbana , Illinois 61801 , United States
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30
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Li A, Li P, Geng Y, Xu S, Zhang H, Cui H, Xu W. Investigation of supramolecular interaction in 4, 4'-bipyridine crystal by hydrostatic pressure spectroscopies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 202:70-75. [PMID: 29777937 DOI: 10.1016/j.saa.2018.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Revised: 04/05/2018] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
The luminescence and structural changes of 4, 4'-bipyridine in the crystal and powder forms under the effect of high pressure applied by a diamond anvil cell has been investigated through the fluorescence and Raman spectroscopies. In its single crystal structure, the 4, 4'-bipyridine molecules are paralleled arranged with the identifiable CH⋯N and π⋯π interactions among molecules. However, in the powder form, these intermolecular interactions nearly diminish. The 4, 4'-bipyridine crystal shows the obvious bathochromic-shifting of the emission band, which is different from the powder sample that displays a fixed luminescent band during compression. Additionally, the Raman bands of them both show shifts to higher wavenumbers as different degrees. The detailed peak assignments are performed based on the theoretical calculation through B3LYP method. Comparisons in spectral behaviors between the crystal and powder under compression show the crystal form exhibits a superior mechanochromic performance relative to the powder one, because the intermolecular interactions in the crystal form play dominating roles and they can be easily tuned along with pressure in such a highly ordered structure compared to the powder form. The relation investigation between property and supramolecular interactions not only makes deeper understanding in the mechanochromic mechanisms of 4, 4'-bipyridine, but also gives a helpful reference for the molecular designs of coordination polymers and co-crystals with 4, 4'-bipyridine involved.
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Affiliation(s)
- Aisen Li
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, PR China 130012; College of Physics, Jilin University, Changchun 130012, PR China
| | - Ping Li
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, PR China 130012
| | - Yijia Geng
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, PR China 130012
| | - Shuping Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, PR China 130012.
| | - Houyu Zhang
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, PR China 130012
| | - Haining Cui
- College of Physics, Jilin University, Changchun 130012, PR China
| | - Weiqing Xu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun, PR China 130012
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31
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Rams-Baron M, Pacułt J, Jędrzejowska A, Knapik-Kowalczuk J, Paluch M. Changes in Physical Stability of Supercooled Etoricoxib after Compression. Mol Pharm 2018; 15:3969-3978. [PMID: 30052449 DOI: 10.1021/acs.molpharmaceut.8b00428] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In the case of formulations with amorphous active pharmaceutical ingredients the risk of pressure-induced recrystallization should be carefully considered. We reported here that supercooled etoricoxib (ETB), which was found as a relatively stable system with low crystallization tendency at atmospheric pressure, crystallized quickly after compression. The observed strong pressure-dependence of the induction period suggests that during compression the first step of crystallization that is nucleation may be accelerated. To overcome the experimental challenge associated with studies at elevated temperatures and high pressures we applied broadband dielectric spectroscopy. Dielectric measurements gave us detailed insight into crystallization kinetics of ETB at varying ( T, p) conditions corresponding to the supercooled liquid state of a drug. We found that pressure-induced recrystallization of supercooled ETB, constituting a serious impediment from a technological point of view, can be efficiently inhibited when amorphous solid dispersion containing ETB and polymer polyvinylpyrrolidone PVP (10% w/w) was prepared. Besides, we performed the comprehensive analysis of molecular dynamics of both systems at elevated pressure to address some fundamental issues related to the pressure sensitivity of their supercooled dynamics.
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Affiliation(s)
- Marzena Rams-Baron
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Justyna Pacułt
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Agnieszka Jędrzejowska
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Justyna Knapik-Kowalczuk
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
| | - Marian Paluch
- Institute of Physics , University of Silesia , 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland.,Silesian Center for Education and Interdisciplinary Research, 75 Pulku Piechoty 1A , 41-500 Chorzow , Poland
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32
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Teixeira S, Leāo J, Gagnon C, McHugh M. High pressure cell for Bio-SANS studies under sub-zero temperatures or heat denaturing conditions. JOURNAL OF NEUTRON RESEARCH 2018. [DOI: 10.3233/jnr-180057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- S.C.M. Teixeira
- Dep. of Chemical and Biomolecular Engineering, University of Delaware, 150 Academy Street, Newark, DE 19716, USA
- NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA
| | - J.B. Leāo
- NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA
| | - C. Gagnon
- NIST Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA
- Dep. of Materials Science and Engineering, University of Maryland, College Park, MD 20742, USA
| | - M.A. McHugh
- Dep. of Chemical and Life Science Engineering, Virginia Commonwealth University, 601 West Main Street, Richmond, VA 23284, USA
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33
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Doma SB, El-Gammal FN, Amer AA. Ground-state calculations of confined hydrogen molecule H 2 using variational Monte Carlo method. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1459000] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Affiliation(s)
- S. B. Doma
- Mathematics Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - F. N. El-Gammal
- Mathematics Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
| | - A. A. Amer
- Mathematics Department, Faculty of Science, Menoufia University, Shebin El-Kom, Egypt
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34
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Fanetti S, Citroni M, Dziubek K, Nobrega MM, Bini R. The role of H-bond in the high-pressure chemistry of model molecules. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:094001. [PMID: 29345624 DOI: 10.1088/1361-648x/aaa8cf] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Pressure is an extraordinary tool to modify direction and strength of intermolecular interactions with important consequences on the chemical stability of molecular materials. The decrease of the distance among nearest neighbour molecules can give rise to reactive configurations reflecting the crystal arrangement and leading to association processes. In this context, the role of the H-bonds is very peculiar because their usual strengthening with rising pressure does not necessarily configure a decrease of the reaction activation energy but, on the contrary, can give rise to an anomalous stability of the system. In spite of this central role, the mechanisms by which a chemical reaction is favoured or prevented by H-bonding under high pressure conditions is a poorly explored field. Here we review a few studies where the chemical behaviour of simple molecular systems under static compression was related to the H-bonding evolution with pressure. These results are able to clarify a wealth of changes of the chemical and physical properties caused by the strengthening with pressure of the H-bonding network and provide additional tools to understand the mechanisms of high-pressure reactivity, a mandatory step to make these synthetic methods of potential interest for applicative purposes.
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Affiliation(s)
- Samuele Fanetti
- LENS, European Laboratory for Non-linear Spectroscopy, Via N. Carrara 1, I-50019 Sesto Fiorentino, Firenze, Italy. Dipartimento di Chimica 'Ugo Schiff' dell'Università degli Studi di Firenze, Via della Lastruccia 3, I-50019 Sesto Fiorentino, Firenze, Italy
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35
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Spooner J, Wiebe H, Louwerse M, Reader B, Weinberg N. Theoretical analysis of high-pressure effects on conformational equilibria. CAN J CHEM 2018. [DOI: 10.1139/cjc-2017-0411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Along with temperature, pressure is the most important physical parameter determining the thermodynamic properties and reactivity of chemical systems. In this work, we discuss the effects of high pressure on conformational properties of organic molecules and propose an approach toward calculation of conformational volume changes based on molecular dynamics simulations. The results agree well with the experimental data. Furthermore, we demonstrate that pressure can be used as an instrument for fine-tuning of molecular conformations and to propel a properly constructed molecular rotor possessing a suitable combination of energy and volume profiles.
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Affiliation(s)
- Jacob Spooner
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Heather Wiebe
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Miranda Louwerse
- Department of Chemistry, University of the Fraser Valley, Abbotsford, BC V2S 7M8, Canada
| | - Brandon Reader
- Department of Chemistry, University of the Fraser Valley, Abbotsford, BC V2S 7M8, Canada
| | - Noham Weinberg
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, University of the Fraser Valley, Abbotsford, BC V2S 7M8, Canada
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36
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Wang Y, Zhang H, Yang X, Jiang S, Goncharov AF. Kinetic boundaries and phase transformations of iceiat high pressure. J Chem Phys 2018; 148:044508. [DOI: 10.1063/1.5017507] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Yu Wang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, Anhui, People’s Republic of China
| | - Huichao Zhang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, Anhui, People’s Republic of China
| | - Xue Yang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
| | - Shuqing Jiang
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
| | - Alexander F. Goncharov
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, People’s Republic of China
- University of Science and Technology of China, Hefei 230026, Anhui, People’s Republic of China
- Geophysical Laboratory, Carnegie Institution of Washington, 5251 Broad Branch Road NW, Washington, DC 20015, USA
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37
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Guan J, Daljeet R, Song Y. Pressure-selected reactivity between 2-butyne and water induced by two-photon excitation. CAN J CHEM 2017. [DOI: 10.1139/cjc-2017-0155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
High-pressure photochemistry between 2-butyne (H3CC≡CCH3) and trace amount of H2O was investigated at room temperature using multiline UV radiation at λ ≈ 350 nm and monitored by FTIR spectroscopy. Instead of the expected polymerization of 2-butyne, the IR spectral analysis suggests the formation of cis- and trans-2-butene, as well as 2-butanone, as the primary products. The possible reaction mechanisms and production pathways of these products were examined, where the dissociation of water molecule as the other reactant is believed as the essential step of the photochemical reaction. We further found that initial loading pressure of the mixture can not only substantially influence the reaction kinetics, but also regulate the accessibilities to some reaction channels, which was evidenced by quantitative analysis of the characteristic IR bands of 2-butene and 2-butanone. The relative abundance of two products is found to be highly dependent on pressure and radiation time. This study provides attractive physical routes in the absence of solvents, catalysts, and radical initiators, to synthesis the relevant products with a great selectivity and feasibility.
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Affiliation(s)
- Jiwen Guan
- Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
| | - Roshan Daljeet
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
| | - Yang Song
- Department of Physics and Astronomy, University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Chemistry, University of Western Ontario, London, ON N6A 5B7, Canada
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38
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Ji C, Goncharov AF, Shukla V, Jena NK, Popov D, Li B, Wang J, Meng Y, Prakapenka VB, Smith JS, Ahuja R, Yang W, Mao HK. Stability of Ar(H 2) 2 to 358 GPa. Proc Natl Acad Sci U S A 2017; 114:3596-3600. [PMID: 28289218 PMCID: PMC5389335 DOI: 10.1073/pnas.1700049114] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
"Chemical precompression" through introducing impurity atoms into hydrogen has been proposed as a method to facilitate metallization of hydrogen under external pressure. Here we selected Ar(H2)2, a hydrogen-rich compound with molecular hydrogen, to explore the effect of "doping" on the intermolecular interaction of H2 molecules and metallization at ultrahigh pressure. Ar(H2)2 was studied experimentally by synchrotron X-ray diffraction to 265 GPa, by Raman and optical absorption spectroscopy to 358 GPa, and theoretically using the density-functional theory. Our measurements of the optical bandgap and the vibron frequency show that Ar(H2)2 retains 2-eV bandgap and H2 molecular units up to 358 GPa. This is attributed to reduced intermolecular interactions between H2 molecules in Ar(H2)2 compared with that in solid H2 A splitting of the molecular vibron mode above 216 GPa suggests an orientational ordering transition, which is not accompanied by a change in lattice symmetry. The experimental and theoretical equations of state of Ar(H2)2 provide direct insight into the structure and bonding of this hydrogen-rich system, suggesting a negative chemical pressure on H2 molecules brought about by doping of Ar.
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Affiliation(s)
- Cheng Ji
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439
| | - Alexander F Goncharov
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Vivekanand Shukla
- Condensed Matter Theory, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, S-75120 Uppsala, Sweden
| | - Naresh K Jena
- Condensed Matter Theory, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, S-75120 Uppsala, Sweden
| | - Dmitry Popov
- High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439
| | - Bing Li
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Center for the Study of Matter at Extreme Conditions, Department of Mechanical and Materials Engineering, Florida International University, Miami, FL 33199
- High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439
| | - Junyue Wang
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015
| | - Yue Meng
- High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439
| | - Vitali B Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Argonne, IL 60439
| | - Jesse S Smith
- High Pressure Collaborative Access Team, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439
| | - Rajeev Ahuja
- Condensed Matter Theory, Materials Theory Division, Department of Physics and Astronomy, Uppsala University, S-75120 Uppsala, Sweden
| | - Wenge Yang
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China
- High Pressure Synergetic Consortium, Geophysical Laboratory, Carnegie Institution of Washington, Argonne, IL 60439
| | - Ho-Kwang Mao
- Center for High Pressure Science and Technology Advanced Research, Shanghai 201203, China;
- Geophysical Laboratory, Carnegie Institution of Washington, Washington, DC 20015
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39
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Li D, Zhang K, Song M, Zhai N, Sun C, Li H. High-pressure Raman study of Terephthalonitrile. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:376-382. [PMID: 27694011 DOI: 10.1016/j.saa.2016.09.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 09/24/2016] [Accepted: 09/25/2016] [Indexed: 06/06/2023]
Abstract
The in situ high-pressure Raman spectra of Terephthalonitrile (TPN) have been investigated from ambient to 12.6GPa at room temperature. All the fundamental vibrational modes of TPN at ambient were assigned based on the first-principle calculations. A detailed Raman spectroscopy analysis revealed that TPN underwent a phase transition at ~5.3GPa. The frequencies of the TPN Raman peaks increase with increasing the pressure which can be attributed to the reduction in the interatomic distances and the escalation of effective force constants. The intensity of the C-C-C ring-out-plane deformation mode increases gradually as the frequency remains almost constant during the compression which can be explained by the existence of π-π interactions in TPN molecules. Additionally, the pressure-induced structural changes of TPN on the Fermi resonance between the C≡N out-of-plane vibration mode and the C-CN out-of-plane vibration mode have been analyzed.
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Affiliation(s)
- DongFei Li
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, Jilin Province, PR China; State Key Laboratory of Superhard Materials, Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, Jilin Province, PR China
| | - KeWei Zhang
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, Jilin Province, PR China
| | - MingXing Song
- College of Information and Technology, Jilin Normal University, Siping 136000, Jilin Province, PR China
| | - NaiCui Zhai
- Institute of Translational Medicine, the First Hospital, Jilin University, Changchun 130061, Jilin Province, PR China
| | - ChengLin Sun
- State Key Laboratory of Superhard Materials, Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, Jilin Province, PR China.
| | - HaiBo Li
- Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130103, Jilin Province, PR China.
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40
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Spooner J, Weinberg N. A comparative analysis of empirical equations describing pressure dependence of equilibrium and reaction rate constants. CAN J CHEM 2017. [DOI: 10.1139/cjc-2016-0454] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
General properties of the empirical analytical functions used to describe the effect of pressure on rate and equilibrium constants in solution are reviewed, and the effects of experimental errors on the accuracy of activation and reaction volumes predicted by these equations are compared. When the error levels are low (1%–2%) and pressure ranges are small (0–1 kbar), all functions perform well, but when fitting data with high error or extending to higher pressures, special care must be taken to obtain reliable results. Analysis of the results from fitting the equations to simulated data, as well as experimental data for Diels–Alder, Menshutkin, and methanolysis reactions, allows us to propose a set of general recommendations when using these equations as a tool for obtaining accurate activation and reaction volumes.
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Affiliation(s)
- Jacob Spooner
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Noham Weinberg
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, University of the Fraser Valley, Abbotsford, BC V2S 7M8, Canada
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41
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Shen G, Mao HK. High-pressure studies with x-rays using diamond anvil cells. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2017; 80:016101. [PMID: 27873767 DOI: 10.1088/1361-6633/80/1/016101] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Pressure profoundly alters all states of matter. The symbiotic development of ultrahigh-pressure diamond anvil cells, to compress samples to sustainable multi-megabar pressures; and synchrotron x-ray techniques, to probe materials' properties in situ, has enabled the exploration of rich high-pressure (HP) science. In this article, we first introduce the essential concept of diamond anvil cell technology, together with recent developments and its integration with other extreme environments. We then provide an overview of the latest developments in HP synchrotron techniques, their applications, and current problems, followed by a discussion of HP scientific studies using x-rays in the key multidisciplinary fields. These HP studies include: HP x-ray emission spectroscopy, which provides information on the filled electronic states of HP samples; HP x-ray Raman spectroscopy, which probes the HP chemical bonding changes of light elements; HP electronic inelastic x-ray scattering spectroscopy, which accesses high energy electronic phenomena, including electronic band structure, Fermi surface, excitons, plasmons, and their dispersions; HP resonant inelastic x-ray scattering spectroscopy, which probes shallow core excitations, multiplet structures, and spin-resolved electronic structure; HP nuclear resonant x-ray spectroscopy, which provides phonon densities of state and time-resolved Mössbauer information; HP x-ray imaging, which provides information on hierarchical structures, dynamic processes, and internal strains; HP x-ray diffraction, which determines the fundamental structures and densities of single-crystal, polycrystalline, nanocrystalline, and non-crystalline materials; and HP radial x-ray diffraction, which yields deviatoric, elastic and rheological information. Integrating these tools with hydrostatic or uniaxial pressure media, laser and resistive heating, and cryogenic cooling, has enabled investigations of the structural, vibrational, electronic, and magnetic properties of materials over a wide range of pressure-temperature conditions.
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Affiliation(s)
- Guoyin Shen
- Geophysical Laboratory, Carnegie Institution of Washington, Washington DC, USA
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42
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Spooner J, Smith B, Weinberg N. Effect of high pressure on the topography of potential energy surfaces. CAN J CHEM 2016. [DOI: 10.1139/cjc-2016-0295] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Properties and reactivity of chemical compounds change dramatically at elevated pressures. Since kinetics and mechanisms of condensed-phase reactions are described in terms of their potential energy (PESs) or Gibbs energy (GESs) surfaces, chemical effects of high pressure can be assessed through analysis of pressure-induced deformations of GESs of solvated reaction systems. We discuss general trends expected for such changes and use quantum mechanical calculations to construct PESs of compressed species for hydrogen and methyl transfer reactions.
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Affiliation(s)
- Jacob Spooner
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - Brandon Smith
- Department of Chemistry, University College of the Fraser Valley, Abbotsford, BC V2S 7M8, Canada
| | - Noham Weinberg
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
- Department of Chemistry, University College of the Fraser Valley, Abbotsford, BC V2S 7M8, Canada
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43
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Zhang Y, Mosey NJ. High pressure chemistry of thioaldehydes: A first-principles molecular dynamics study. J Chem Phys 2016; 145:194506. [PMID: 27875893 DOI: 10.1063/1.4967519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
First-principles molecular dynamics simulations are used to investigate the chemical behavior of bulk thioacetaldehyde (MeC(H)S) in response to changes in pressure, P. The simulations show that these molecules oligomerize in response to applied P. Oligomerization is initiated through C-S bond formation, with constrained dynamics simulations showing that the barrier to this reaction step is lowered significantly by applied P. Subsequent reactions involving the formation of additional C-S bonds or radical processes that lead to S-S and C-C bonds lengthen the oligomers. Oligomerization is terminated through proton transfer or the formation of rings. The mechanistic details of all reactions are examined. The results indicate that the P-induced reactivity of the MeC(H)S-based system differs significantly from that of analogous MeC(H)O-based systems, which have been reported previously. Comparison with the MeC(H)O study shows that replacing oxygen with sulfur significantly lowers the P required to initiate oligomerization (from 26 GPa to 5 GPa), increases the types of reactions in which systems of this type can take part, and increases the variety of products formed through these reactions. These differences can be explained in terms of the electronic structures of these systems, which may be useful for certain high P applications.
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Affiliation(s)
- Yaoting Zhang
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
| | - Nicholas J Mosey
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, Ontario K7L 3N6, Canada
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44
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Skarmoutsos I, Mossa S, Samios J. Structure and dynamics of liquid CS 2: Going from ambient to elevated pressure conditions. J Chem Phys 2016; 145:154505. [PMID: 27782484 DOI: 10.1063/1.4964816] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Molecular dynamics simulation studies were performed to investigate the structural and dynamic properties of liquid carbon disulfide (CS2) from ambient to elevated pressure conditions. The results obtained have revealed structural changes at high pressures, which are related to the more dense packing of the molecules inside the first solvation shell. The calculated neutron and X-ray structure factors have been compared with available experimental diffraction data, also revealing the pressure effects on the short-range structure of the liquid. The pressure effects on the translational, reorientational, and residence dynamics are very strong, revealing a significant slowing down when going from ambient pressure to 1.2 GPa. The translational dynamics of the linear CS2 molecules have been found to be more anisotropic at elevated pressures, where cage effects and librational motions are reflected on the shape of the calculated time correlation functions and their corresponding spectral densities.
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Affiliation(s)
- Ioannis Skarmoutsos
- Department of Chemistry, Laboratory of Physical Chemistry, University of Athens, Panepistimiopolis, 157-71 Athens, Greece
| | - Stefano Mossa
- INAC-SYMMES, CEA-Grenoble, 17 Rue des Martyrs, 38054 Grenoble, France
| | - Jannis Samios
- Department of Chemistry, Laboratory of Physical Chemistry, University of Athens, Panepistimiopolis, 157-71 Athens, Greece
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45
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Maynard-Casely HE. ‘Peaks in space’ – crystallography in planetary science: past impacts and future opportunities. CRYSTALLOGR REV 2016. [DOI: 10.1080/0889311x.2016.1242127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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46
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Boutopoulos C, Dagallier A, Sansone M, Blanchard-Dionne AP, Lecavalier-Hurtubise É, Boulais É, Meunier M. Photon-induced generation and spatial control of extreme pressure at the nanoscale with a gold bowtie nano-antenna platform. NANOSCALE 2016; 8:17196-17203. [PMID: 27714040 DOI: 10.1039/c6nr03888c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Precise spatial and temporal control of pressure stimulation at the nanometer scale is essential for the fabrication and manipulation of nano-objects, and for exploring single-molecule behaviour of matter under extreme conditions. However, state-of-the-art nano-mechanical transducers require sophisticated driving hardware and are currently limited to moderate pressure regimes. Here we report a gold plasmonic bowtie (AuBT) nano-antennas array that can generate extreme pressure stimulus of ∼100 GPa in the ps (10-12 s) time scale with sub-wavelength resolution upon irradiation with ultra-short laser pulses. Our method leverages the non-linear interaction of photons with water molecules to excite a nano-plasma in the plasmon-enhanced near-field and induce extreme thermodynamic states. The proposed method utilizes laser pulses, which in contrast to micro- and nano-mechanical actuators offers simplicity and versatility. We present time-resolved shadowgraphic imaging, electron microscopy and simulation data that suggest that our platform can efficiently create cavitation nano-bubbles and generate intense pressure in specific patterns, which can be controlled by the selective excitation of plasmon modes of distinct polarizations. This novel platform should enable probing non-invasively the mechanical response of cells and single-molecules at time and pressure regimes that are currently difficult to reach with other methods.
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Affiliation(s)
- Christos Boutopoulos
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada. and SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, KY16 9SS, UK
| | - Adrien Dagallier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
| | - Maria Sansone
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada. and Dipartimento di Chimica "A.M. Tamburro", Università della Basilicata, Viadell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Andre-Pierre Blanchard-Dionne
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
| | - Évelyne Lecavalier-Hurtubise
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
| | - Étienne Boulais
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada. and Laboratory of Biosensors and Nanomachines, Department of Chemistry, Université de Montréal, Montréal, Québec H3T 1J4, Canada
| | - Michel Meunier
- Laser Processing and Plasmonics Laboratory, Department of Engineering Physics, Polytechnique Montréal, Montréal, Québec H3C 3A7, Canada.
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Yuan H, Gai B, Liu J, Guo J, Li H, Hu S, Deng L, Jin Y, Sang F. Phase-interfacial stimulated Raman scattering generated in strongly pumped water. OPTICS LETTERS 2016; 41:3335-3338. [PMID: 27420529 DOI: 10.1364/ol.41.003335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We have observed unusual blue-shifted radiations in water pumped by a strong 532-nm nanosecond laser. Properties including divergence, polarizations, and pulse shapes of the unusual radiations are measured and compared with those of the regular stimulated Raman scattering (SRS) in water. The unusual radiations are attributed to the parametric anti-Stokes SRS that occurs on the interface of water and ionization plasma (or gas) formed in the laser-induced breakdown of water.
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48
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Jung S, Lee MS, Shin Y, Kim CT, Kim IH, Kim Y. High Hydrostatic Pressure Extract of Red Ginseng Attenuates Inflammation in Rats with High-fat Diet Induced Obesity. Prev Nutr Food Sci 2015; 20:253-9. [PMID: 26770912 DOI: 10.3746/pnf.2015.20.4.253] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 09/25/2015] [Indexed: 01/30/2023] Open
Abstract
Chronic low-grade inflammation is associated with obesity. This study investigated effect of high hydrostatic pressure extract of red ginseng (HRG) on inflammation in rats with high-fat (HF) diet induced obesity. Male, Sprague-Dawley rats (80~110 g) were randomly divided into two groups, and fed a 45% HF diet (HF) and a 45% HF diet containing 1.5% HRG (HF+HRG) for 14 weeks. At the end of the experiment, the serum leptin level was reduced by the HRG supplementation. The mRNA expression of genes related to adipogenesis including peroxisome proliferator-activated receptor-gamma and adipocyte protein 2 was down-regulated in the white adipose tissue (WAT). The mRNA levels of major inflammatory cytokines such as tumor necrosis factor-α, monocyte chemoattractant protein 1, and interleukin-6 were remarkably down-regulated by the HRG in WAT. These results suggest that HRG might be beneficial in ameliorating the inflammation-associated health complications by suppressing adipogenic and pro-inflammatory gene expression.
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Affiliation(s)
- Sunyoon Jung
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Korea
| | - Mak-Soon Lee
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Korea
| | - Yoonjin Shin
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Korea
| | - Chong-Tai Kim
- Functional Materials Research Group, Korea Food Research Institute, Seongnam, Gyeonggi 13539, Korea
| | - In-Hwan Kim
- Department of Food and Nutrition, Korea University, Seoul 02841, Korea
| | - Yangha Kim
- Department of Nutritional Science and Food Management, Ewha Womans University, Seoul 03760, Korea
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49
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Xiao LP, Zhong GH, Zeng Z, Chen XJ. Theoretical study on structural and electronic properties of solid anthracene under high pressure by density functional theory. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1099753] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Ling-Ping Xiao
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, China
- University of Science and Technology of China, Hefei, China
| | - Guo-Hua Zhong
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zhi Zeng
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, China
- University of Science and Technology of China, Hefei, China
| | - Xiao-Jia Chen
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, China
- Center for High Pressure Science and Technology Advanced Research, Shanghai, China
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50
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Liu WL, Bassett WP, Christensen JM, Dlott DD. Emission Lifetimes of a Fluorescent Dye under Shock Compression. J Phys Chem A 2015; 119:10910-6. [PMID: 26469397 DOI: 10.1021/acs.jpca.5b09695] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The emission lifetimes of rhodamine 6G (R6G) were measured under shock compression to 9.1 GPa, with the dual intents of better understanding molecular photophysics in extreme environments and assessing the usefulness of fluorescence lifetime microscopy to measure spatially dependent pressure distributions in shocked microstructured media. R6G was studied as free dye dissolved in poly(methyl methacrylate) (PMMA), or dye encapsulated in silica microparticles suspended in PMMA. Thin layers of these materials in impedance-matched geometries were subjected to planar single-stage shocks created by laser-driven flyer plates. A synchronized femtosecond laser excited the dye at selected times relative to flyer plate arrival and the emission lifetimes were measured with a streak camera. Lifetimes decreased when shocks arrived. The lifetime decrease was attributed to a shock-induced enhancement of R6G nonradiative relaxation. At least part of the relaxation involved shock-enhanced intersystem crossing. For free dye in PMMA, the lifetime decrease during the shock was shown to be a linear function of shock pressure from 0 to 9 GPa, with a slope of -0.22 ns·GPa(-1). The linear relationship makes it simple to convert lifetimes into pressures. Lifetime measurements in shocked microenvironments may be better than emission intensity measurements, because lifetimes are sensitive to the surrounding environment, but insensitive to intensity variations associated with the motion and optical properties of a dynamically changing structure.
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Affiliation(s)
- Wei-long Liu
- School of Chemical Sciences and Fredrick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Will P Bassett
- School of Chemical Sciences and Fredrick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - James M Christensen
- School of Chemical Sciences and Fredrick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
| | - Dana D Dlott
- School of Chemical Sciences and Fredrick Seitz Materials Research Laboratory, University of Illinois at Urbana-Champaign , Urbana, Illinois 61801, United States
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