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Bergmeister S, Kollotzek S, Calvo F, Gruber E, Zappa F, Scheier P, Echt O. Adsorption of Helium and Hydrogen on Triphenylene and 1,3,5-Triphenylbenzene. Molecules 2022; 27:molecules27154937. [PMID: 35956887 PMCID: PMC9370105 DOI: 10.3390/molecules27154937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 07/29/2022] [Accepted: 08/01/2022] [Indexed: 11/16/2022] Open
Abstract
The adsorption of helium or hydrogen on cationic triphenylene (TPL, C18H12), a planar polycyclic aromatic hydrocarbon (PAH) molecule, and of helium on cationic 1,3,5-triphenylbenzene (TPB, C24H18), a propeller-shaped PAH, is studied by a combination of high-resolution mass spectrometry and classical and quantum computational methods. Mass spectra indicate that HenTPL+ complexes are particularly stable if n = 2 or 6, in good agreement with the quantum calculations that show that for these sizes, the helium atoms are strongly localized on either side of the central carbon ring for n = 2 and on either side of the three outer rings for n = 6. Theory suggests that He14TPL+ is also particularly stable, with the helium atoms strongly localized on either side of the central and outer rings plus the vacancies between the outer rings. For HenTPB+, the mass spectra hint at enhanced stability for n = 2, 4 and, possibly, 11. Here, the agreement with theory is less satisfactory, probably because TPB+ is a highly fluxional molecule. In the global energy minimum, the phenyl groups are rotated in the same direction, but when the zero-point harmonic correction is included, a structure with one phenyl group being rotated opposite to the other two becomes lower in energy. The energy barrier between the two isomers is very small, and TPB+ could be in a mixture of symmetric and antisymmetric states, or possibly even vibrationally delocalized.
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Affiliation(s)
- Stefan Bergmeister
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, A-6020 Innsbruck, Austria; (S.B.); (S.K.); (E.G.); (F.Z.); (P.S.)
| | - Siegfried Kollotzek
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, A-6020 Innsbruck, Austria; (S.B.); (S.K.); (E.G.); (F.Z.); (P.S.)
| | - Florent Calvo
- Laboratoire Interdisciplinaire de Physique, CNRS, Université Grenoble Alpes, F-38000 Grenoble, France
- Correspondence: (F.C.); (O.E.)
| | - Elisabeth Gruber
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, A-6020 Innsbruck, Austria; (S.B.); (S.K.); (E.G.); (F.Z.); (P.S.)
| | - Fabio Zappa
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, A-6020 Innsbruck, Austria; (S.B.); (S.K.); (E.G.); (F.Z.); (P.S.)
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, A-6020 Innsbruck, Austria; (S.B.); (S.K.); (E.G.); (F.Z.); (P.S.)
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, A-6020 Innsbruck, Austria; (S.B.); (S.K.); (E.G.); (F.Z.); (P.S.)
- Department of Physics, University of New Hampshire, Durham, NH 03824, USA
- Correspondence: (F.C.); (O.E.)
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2
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Schiller A, Meyer M, Martini P, Zappa F, Krasnokutski SA, Calvo F, Scheier P. Adsorption of Helium on Small Cationic PAHs: Influence of Hydrocarbon Structure on the Microsolvation Pattern. J Phys Chem A 2021; 125:7813-7824. [PMID: 34436885 PMCID: PMC8450901 DOI: 10.1021/acs.jpca.1c05150] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 08/11/2021] [Indexed: 11/29/2022]
Abstract
The adsorption of up to ∼100 helium atoms on cations of the planar polycyclic aromatic hydrocarbons (PAHs) anthracene, phenanthrene, fluoranthene, and pyrene was studied by combining helium nanodroplet mass spectrometry with classical and quantum computational methods. Recorded time-of-flight mass spectra reveal a unique set of structural features in the ion abundance as a function of the number of attached helium atoms for each of the investigated PAHs. Path-integral molecular dynamics simulations were used with a polarizable potential to determine the underlying adsorption patterns of helium around the studied PAH cations and in good general agreement with the experimental data. The calculated structures of the helium-PAH complexes indicate that the arrangement of adsorbed helium atoms is highly sensitive toward the structure of the solvated PAH cation. Closures of the first solvation shell around the studied PAH cations are suggested to lie between 29 and 37 adsorbed helium atoms depending on the specific PAH cation. Helium atoms are found to preferentially adsorb on these PAHs following the 3 × 3 commensurate pattern common for graphitic surfaces, in contrast to larger carbonaceous molecules like corannulene, coronene, and fullerenes that exhibit a 1 × 1 commensurate phase.
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Affiliation(s)
- Arne Schiller
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Miriam Meyer
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Paul Martini
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Fabio Zappa
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Serge A. Krasnokutski
- Laboratory
Astrophysics Group of the MPI for Astronomy at the University of Jena, Helmholtzweg 3, D-07743 Jena, Germany
| | - Florent Calvo
- CNRS,
LiPhy, Univ. Grenoble Alpes, F-38000 Grenoble, France
| | - Paul Scheier
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
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3
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Ramirez-de-Arellano JM, Canales M, Magaña LF. Carbon Nanostructures Doped with Transition Metals for Pollutant Gas Adsorption Systems. Molecules 2021; 26:5346. [PMID: 34500783 PMCID: PMC8434604 DOI: 10.3390/molecules26175346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 08/28/2021] [Accepted: 08/31/2021] [Indexed: 12/15/2022] Open
Abstract
The adsorption of molecules usually increases capacity and/or strength with the doping of surfaces with transition metals; furthermore, carbon nanostructures, i.e., graphene, carbon nanotubes, fullerenes, graphdiyne, etc., have a large specific area for gas adsorption. This review focuses on the reports (experimental or theoretical) of systems using these structures decorated with transition metals for mainly pollutant molecules' adsorption. Furthermore, we aim to present the expanding application of nanomaterials on environmental problems, mainly over the last 10 years. We found a wide range of pollutant molecules investigated for adsorption in carbon nanostructures, including greenhouse gases, anticancer drugs, and chemical warfare agents, among many more.
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Affiliation(s)
- J. M. Ramirez-de-Arellano
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Av. Eugenio Garza Sada 2501, Monterrey 64849, Mexico;
| | - M. Canales
- Universidad Autónoma Metropolitana Unidad Azcapotzalco, Av. San Pablo Xalpa No. 180, Colonia Reynosa Tamaulipas, Delegación Azcapotzalco, Ciudad de México 02200, Mexico;
| | - L. F. Magaña
- Instituto de Física, Universidad Nacional Autónoma de Mexico, Apartado Postal 20-364, Ciudad de México 01000, Mexico
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4
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Gnidovec A, Čopar S. Long-range order in quadrupolar systems on spherical surfaces. SOFT MATTER 2021; 17:4874-4883. [PMID: 33890591 DOI: 10.1039/d1sm00228g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The interplay between curvature, confinement and ordering on curved manifolds, with anisotropic interactions between building blocks, takes a central role in many fields of physics. In this paper, we investigate the effects of lattice symmetry and local positional order on orientational ordering in systems of long-range interacting point quadrupoles on a sphere in the zero temperature limit. Locally triangular spherical lattices show long-range ordered quadrupolar configurations only for specific symmetric lattices as strong geometric frustration prevents general global ordering. Conversely, the ground states on Caspar-Klug lattices are more diverse, with many different symmetries depending on the position of quadrupoles within the fundamental domain. We also show that by constraining the quadrupole tilts with respect to the surface normal, which models interactions with the substrate, and by considering general quadrupole tensors, we can manipulate the ground state configuration symmetry.
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Affiliation(s)
- AndraŽ Gnidovec
- University of Ljubljana, Faculty of Mathematics and Physics, SI-1000 Ljubljana, Slovenia.
| | - Simon Čopar
- University of Ljubljana, Faculty of Mathematics and Physics, SI-1000 Ljubljana, Slovenia.
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5
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Dubey KA, Jose J. Revival of resonance shape parameter in elastic scattering of H atom with charged fullerenes C60z+. Chem Phys 2020. [DOI: 10.1016/j.chemphys.2020.110982] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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González-Lezana T, Echt O, Gatchell M, Bartolomei M, Campos-Martínez J, Scheier P. Solvation of ions in helium. INT REV PHYS CHEM 2020. [DOI: 10.1080/0144235x.2020.1794585] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Tomás González-Lezana
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas IFF-CSIC, Madrid, Spain
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
- Department of Physics, University of New Hampshire, Durham, NH, USA
| | - Michael Gatchell
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
- Department of Physics, Stockholm University, Stockholm, Sweden
| | - Massimiliano Bartolomei
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas IFF-CSIC, Madrid, Spain
| | - José Campos-Martínez
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas IFF-CSIC, Madrid, Spain
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Innsbruck, Austria
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7
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The Acid-Base Through-the-Cage Interaction as an Example of an Inversion in a Cage Isomerism. Symmetry (Basel) 2020. [DOI: 10.3390/sym12081291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
We define a new inversion in a cage isomerism (ic): X@C⋯Y₪icY@C⋯X, (₪ is the isomerism relation) as an isomerism in the three-component system of molecules X, Y, and a cage C, in which one of the molecules is located inside and the other outside the cage. The ic isomerism is similar to the endo-exo one, which occurs only if either the interior or exterior of C is empty. By contrast, ic occurs only if neither the interior nor the exterior of C is empty. We also discuss the other closely related types of isomerisms are also discussed. Calculations of the XH⋯NH3@C60 and NH3⋯HX@C60ic isomers were performed at the ωB97XD/Def2TZVP level. The calculated energies demonstrated that the systems with the HX acid outside (X = F, Cl) and the NH3 base inside the cage, XH⋯NH3@C60, are more stable than their ic isomers, NH3⋯HX@C60, by about 4–8 kcal/mol. This is because NH3 is more stabilized inside the cage than HX (a matter of 6.5 kcal/mol). In the studied systems and subsystems, the HX molecules are Lewis acids and the NH3 molecule is always a Lewis base. The C60 molecule with HX inside or outside the cage is also an acid for the NH3 base positioned outside or inside the cage. On the other hand, the C60 cage is truly amphoteric because it is simultaneously an acid and a base.
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8
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Dhahak A, Carre V, Aubriet F, Mauviel G, Burkle-Vitzthum V. Analysis of Products Obtained from Slow Pyrolysis of Poly(ethylene terephthalate) by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry Coupled to Electrospray Ionization (ESI) and Laser Desorption Ionization (LDI). Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b05879] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Asma Dhahak
- Laboratoire Réactions et Génie des Procédés (LRGP-CNRS UMR 7274), 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - Vincent Carre
- LCP-A2MC, FR 2843 Institut Jean Barriol de Chimie et Physique Moléculaires et Biomoléculaires, FR 3624 Réseau National de Spectrométrie de Masse FT-ICR à très haut champ, Université′ de Lorraine, ICPM, 1 Boulevard Arago, 57078 Metz Cedex 03, France
| | - Fréderic Aubriet
- LCP-A2MC, FR 2843 Institut Jean Barriol de Chimie et Physique Moléculaires et Biomoléculaires, FR 3624 Réseau National de Spectrométrie de Masse FT-ICR à très haut champ, Université′ de Lorraine, ICPM, 1 Boulevard Arago, 57078 Metz Cedex 03, France
| | - Guillain Mauviel
- Laboratoire Réactions et Génie des Procédés (LRGP-CNRS UMR 7274), 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
| | - Valérie Burkle-Vitzthum
- Laboratoire Réactions et Génie des Procédés (LRGP-CNRS UMR 7274), 1 rue Grandville, BP 20451, 54001 Nancy Cedex, France
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9
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Hernández-Rojas J, Calvo F. The Structure of Adamantane Clusters: Atomistic vs. Coarse-Grained Predictions From Global Optimization. Front Chem 2019; 7:573. [PMID: 31475136 PMCID: PMC6707085 DOI: 10.3389/fchem.2019.00573] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Accepted: 07/29/2019] [Indexed: 11/24/2022] Open
Abstract
Candidate structures for the global minima of adamantane clusters, (C10H16)N, are presented. Based on a rigid model for individual molecules with atom-atom pairwise interactions that include Lennard-Jones and Coulomb contributions, low-energy structures were obtained up to N = 42 using the basin-hopping method. The results indicate that adamantane clusters initially grow accordingly with an icosahedral packing scheme, followed above N = 14 by a structural transition toward face-centered cubic structures. The special stabilities obtained at N = 13, 19, and 38 are consistent with these two structural families, and agree with recent mass spectrometry measurements on cationic adamantane clusters. Coarse-graining the intermolecular potential by averaging over all possible orientations only partially confirm the all-atom results, the magic numbers at 13 and 38 being preserved. However, the details near the structural transition are not captured well, because despite their high symmetry the adamantane molecules are still rather anisotropic.
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Affiliation(s)
- Javier Hernández-Rojas
- Departamento de Física e IUdEA, Universidad de La Laguna, San Cristóbal de La Laguna, Spain
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10
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Martini P, Goulart M, Kranabetter L, Gitzl N, Rasul B, Scheier P, Echt O. Charged Clusters of C 60 and Au or Cu: Evidence for Stable Sizes and Specific Dissociation Channels. J Phys Chem A 2019; 123:4599-4608. [PMID: 31062979 PMCID: PMC6545602 DOI: 10.1021/acs.jpca.9b02768] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 04/29/2019] [Indexed: 12/02/2022]
Abstract
We have doped helium nanodroplets with C60 and either gold or copper. Positively or negatively charged (C60) mM n± ions (M = Au or Cu) containing up to ≈10 fullerenes and ≈20 metal atoms are formed by electron ionization. The abundance distributions extracted from high-resolution mass spectra reveal several local anomalies. The sizes of the four most stable (C60) mAu n± ions identified in previous calculations for small values of m and n ( m ≤ 2 and n ≤ 2, or m = 1 and n = 3) agree with local maxima in the abundance distributions. Our data suggest the existence of several other relatively stable ions including (C60)2Au3± and (C60)3Au4-. Another feature, namely the absence of bare (C60)2±, confirms the prediction that (C60)2M± dissociates by loss of C60± rather than loss of M. The experimental data also reveal the preference for loss of (charged or neutral) C60 over loss of a metal atom from some larger species such as (C60)3M3+. In contrast to these similarities between Au and Cu, the abundance distributions of (C60)3Au n- and (C60)3Cu n- are markedly different. In this discussion, we emphasize the similarities and differences between anions and cations, and between gold and copper. Also noteworthy is the observation of dianions (C60) mAu n2- for m = 2, 4, and 6.
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Affiliation(s)
- Paul Martini
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Marcelo Goulart
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Lorenz Kranabetter
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Norbert Gitzl
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Bilal Rasul
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
- Department
of Physics, University of Sargodha, 40100 Sargodha, Pakistan
| | - Paul Scheier
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Olof Echt
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
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11
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Bocquet FC, Giovanelli L, Ksari Y, Ovramenko T, Mayne AJ, Dujardin G, Spillebout F, Sonnet P, Bondino F, Magnano E, Themlin JM. Peculiar covalent bonding of C 60/6H-SiC(0 0 0 1)-(3 × 3) probed by photoelectron spectroscopy. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:505002. [PMID: 30468155 DOI: 10.1088/1361-648x/aaed1a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
High resolution photoemission with synchrotron radiation was used to study the interface formation of a thin layer of C60 on 6H-SiC(0 0 0 1)-(3 × 3), characterized by protruding Si-tetramers. The results show that C60 is chemisorbed by orbital hybridization between the highest-occupied molecular orbital (HOMO) and the p z orbital of Si adatom at the apex of the tetramers. The covalent nature of the bonding was inferred from core level as well as valence band spectra. The Si 2p spectra reveal that a large fraction (at least 45%) of the Si adatoms remain unbound despite the reactive character of the associated dangling bonds. This is consistent with a model in which each C60 is attached to the substrate through a single covalent C60-Si bond. A binding energy shift of the core levels associated with sub-surface Si or C atoms indicates a decrease of the SiC band bending caused by a charge transfer from the C60 molecules to the substrate via the formation of donor-like interface states.
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Affiliation(s)
- F C Bocquet
- Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany. Jülich-Aachen Research Alliance (JARA)-Fundamentals of Future Information Technology, 52425 Jülich, Germany
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12
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Calvo F, Yurtsever E, Tekin A. Physisorption of H 2 on Fullerenes and the Solvation of C 60 by Hydrogen Clusters at Finite Temperature: A Theoretical Assessment. J Phys Chem A 2018; 122:2792-2800. [PMID: 29451795 DOI: 10.1021/acs.jpca.8b00163] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The interaction between hydrogen and carbonaceous nanostructures is of fundamental interest in various areas of physical chemistry. In this contribution we have revisited the physisorption of hydrogen molecules and H2 clusters on fullerenes, following a first-principles approach in which the interaction is quantitatively evaluated for the C20 system using high-level electronic structure methods. Relative to coupled cluster data at the level of single, double, and perturbative triple excitations taken as a benchmark, the results for rotationally averaged physisorbed H2 show a good performance of MP2 variants and symmetry-adapted perturbation theory, but significant deviations and basis set convergence issues are found for dispersion-corrected density functional theory. These electronic structure data are fitted to produce effective coarse-grained potentials for use in larger systems such as C60-H2. Using path-integral molecular dynamics, the potentials are also applied to parahydrogen clusters solvated around fullerenes, across the regime where the first solvation shell becomes complete and as a function of increasing temperature. For C60 our findings indicate a sensible dependence of the critical solvation size on the underlying potential. As the temperature is increased, a competition is found between the surface and radial expansions of the solvation shell, with one molecule popping away at intermediate temperatures but getting reinserted at even higher temperatures.
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Affiliation(s)
- F Calvo
- LiPhy , Université Grenoble Alpes and CNRS UMR 5588 , 140 Avenue de la Physique , 38402 St Martin d'Hères , France
| | - E Yurtsever
- Koç University , Chemistry Department , Rumeli Feneri Yolu , 34450 Sariyer, Istanbul , Turkey
| | - A Tekin
- Informatics Institute , Istanbul Technical University , 34469 Maslak, Istanbul , Turkey
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13
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Wilson J, Faginas-Lago N, Vekeman J, Cuesta IG, Sánchez-Marín J, Sánchez de Merás A. Modeling the Interaction of Carbon Monoxide with Flexible Graphene: From Coupled Cluster Calculations to Molecular-Dynamics Simulations. Chemphyschem 2018; 19:774-783. [DOI: 10.1002/cphc.201701387] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Jake Wilson
- Instituto de Ciencia Molecular; Universitat de València; Catedràtic José Beltrán 2 46980 Paterna Spain
| | - Noelia Faginas-Lago
- Dipartimento di Chimica, Biologia e Biotecnologie; Università di Perugia, Consortium for Computational Molecular and Materials Sciences (CMS); Via Elce di Sotto 8 06123 Perugia Italy
| | - Jelle Vekeman
- Instituto de Ciencia Molecular; Universitat de València; Catedràtic José Beltrán 2 46980 Paterna Spain
| | - Inmaculada G. Cuesta
- Instituto de Ciencia Molecular; Universitat de València; Catedràtic José Beltrán 2 46980 Paterna Spain
- Departamento de Química Física; Universitat de València; Dr. Moliner 50 46100 Burjassot Spain
| | - José Sánchez-Marín
- Instituto de Ciencia Molecular; Universitat de València; Catedràtic José Beltrán 2 46980 Paterna Spain
| | - Alfredo Sánchez de Merás
- Instituto de Ciencia Molecular; Universitat de València; Catedràtic José Beltrán 2 46980 Paterna Spain
- Departamento de Química Física; Universitat de València; Dr. Moliner 50 46100 Burjassot Spain
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14
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Esrafili MD, Mohammadirad N. A first-principles study on the adsorption behaviour of methanol and ethanol over C59B heterofullerene. Mol Phys 2017. [DOI: 10.1080/00268976.2017.1311423] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Mehdi D. Esrafili
- Department of Chemistry, Laboratory of Theoretical Chemistry, University of Maragheh, Maragheh, Iran
| | - Nafiseh Mohammadirad
- Department of Chemistry, Laboratory of Theoretical Chemistry, University of Maragheh, Maragheh, Iran
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15
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Bartolomei M, Pérez de Tudela R, Arteaga K, González-Lezana T, Hernández MI, Campos-Martínez J, Villarreal P, Hernández-Rojas J, Bretón J, Pirani F. Adsorption of molecular hydrogen on coronene with a new potential energy surface. Phys Chem Chem Phys 2017; 19:26358-26368. [DOI: 10.1039/c7cp03819d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Adsorption of molecular hydrogen on coronene studied with a new potential energy surface. Path integral Monte Carlo and basin-hopping calculations have been performed to investigate energies and structures of the corresponding (H2)N-coronene clusters.
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Affiliation(s)
| | | | - Kilian Arteaga
- Instituto de Física Fundamental
- IFF-CSIC
- 28006 Madrid
- Spain
| | | | | | | | | | | | - José Bretón
- Departamento de Física and IUdEA
- Universidad de La Laguna
- 38205 Tenerife
- Spain
| | - Fernando Pirani
- Dipartimento di Chimica
- Biologia e Biotecnologie
- Universitá di Perugia
- Perugia
- Italy
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16
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Calvo F, Yurtsever E. Solvation of carbonaceous molecules by para-H2 and ortho-D2 clusters. II. Fullerenes. J Chem Phys 2016; 145:084304. [PMID: 27586919 DOI: 10.1063/1.4961159] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The coating of various fullerenes by para-hydrogen and ortho-deuterium molecules has been computationally studied as a function of the solvent amount. Rotationally averaged interaction potentials for structureless hydrogen molecules are employed to model their interaction with neutral or charged carbonaceous dopants containing between 20 and 240 atoms, occasionally comparing different fullerenes having the same size but different shapes. The solvation energy and the size of the first solvation shell obtained from path-integral molecular dynamics simulations at 2 K show only minor influence on the dopant charge and on the possible deuteration of the solvent, although the shell size is largest for ortho-D2 coating cationic fullerenes. Nontrivial finite size effects have been found with the shell size varying non-monotonically close to its completion limit. For fullerenes embedded in large hydrogen clusters, the shell size and solvation energy both follow linear scaling with the fullerene size. The shell sizes obtained for C60 (+) and C70 (+) are close to 49 and 51, respectively, and agree with mass spectrometry experiments.
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Affiliation(s)
- F Calvo
- Université Grenoble Alpes, LIPHY, F-38000 Grenoble, France and CNRS, LIPHy, F-38000 Grenoble, France
| | - E Yurtsever
- Koç University, Rumelifeneriyolu, Sariyer, Istanbul 34450, Turkey
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17
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Calvo F, Yurtsever E. Solvation of carbonaceous molecules by para-H2 and ortho-D2 clusters. I. Polycyclic aromatic hydrocarbons. J Chem Phys 2016; 144:224302. [DOI: 10.1063/1.4952957] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Affiliation(s)
- F. Calvo
- Univ. Grenoble Alpes, LIPHY, F-38000 Grenoble, France and CNRS, LIPHY, F-38000 Grenoble, France
| | - E. Yurtsever
- Koç University, Rumelifeneriyolu, Sariyer, Istanbul 34450, Turkey
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18
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Krasnokutski S, Kuhn M, Kaiser A, Mauracher A, Renzler M, Bohme DK, Scheier P. Building Carbon Bridges on and between Fullerenes in Helium Nanodroplets. J Phys Chem Lett 2016; 7:1440-1445. [PMID: 27043313 PMCID: PMC4845062 DOI: 10.1021/acs.jpclett.6b00462] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/04/2016] [Indexed: 05/29/2023]
Abstract
We report the observation of sequential encounters of fullerenes with C atoms in an extremely cold environment. Experiments were performed with helium droplets at 0.37 K doped with C60 molecules and C atoms derived from a novel, pure source of C atoms. Very high-resolution mass spectra revealed the formation of carbenes of the type C60(C:)n with n up to 6. Bridge-type bonding of the C adatoms to form the known dumbbell C60═C═C60 also was observed. Density functional theory calculations were performed that elucidated the carbene character of the C60(C:)n species and their structures. Mass spectra taken in the presence of water impurities and in separate experiments with added H2 also revealed the formation of the adducts C60C(n)(H2O)n and C60C(n)(H2)n probably by H-OH and H-H bond insertion, respectively, and nonreactivity for the dumbell. So C adatoms that form carbenes C60(C:)n can endow pristine C60 with a higher chemical reactivity.
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Affiliation(s)
- Serge
A. Krasnokutski
- Laboratory
Astrophysics Group of the Max Planck Institute
for Astronomy at the Friedrich Schiller University Jena, Helmholtzweg 3, D-07743 Jena, Germany
| | - Martin Kuhn
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Alexander Kaiser
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Andreas Mauracher
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Michael Renzler
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
| | - Diethard K. Bohme
- Department
of Chemistry, York University, 4700 Keele Street, Toronto M3J 1P3, Ontario, Canada
| | - Paul Scheier
- Institut
für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25, A-6020 Innsbruck, Austria
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19
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Bubenchikov MA, Bubenchikov AM, Usenko OV, Tsyrenova VB, Budaev SO. Ability of Fullerene to Accumulate Hydrogen. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201611001077] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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20
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Ralser S, Kaiser A, Probst M, Postler J, Renzler M, Bohme DK, Scheier P. Experimental evidence for the influence of charge on the adsorption capacity of carbon dioxide on charged fullerenes. Phys Chem Chem Phys 2016; 18:3048-55. [DOI: 10.1039/c5cp06587a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The adsorption of CO2 is sensitive to charge on a capturing model carbonaceous surface, such as C60 fullerenes.
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Affiliation(s)
- Stefan Ralser
- Institut für Ionenphysik und Angewandte Physik
- Leopold-Franzens-Universität Innsbruck
- 6020 Innsbruck
- Austria
| | - Alexander Kaiser
- Institut für Ionenphysik und Angewandte Physik
- Leopold-Franzens-Universität Innsbruck
- 6020 Innsbruck
- Austria
| | - Michael Probst
- Institut für Ionenphysik und Angewandte Physik
- Leopold-Franzens-Universität Innsbruck
- 6020 Innsbruck
- Austria
| | - Johannes Postler
- Institut für Ionenphysik und Angewandte Physik
- Leopold-Franzens-Universität Innsbruck
- 6020 Innsbruck
- Austria
| | - Michael Renzler
- Institut für Ionenphysik und Angewandte Physik
- Leopold-Franzens-Universität Innsbruck
- 6020 Innsbruck
- Austria
| | | | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik
- Leopold-Franzens-Universität Innsbruck
- 6020 Innsbruck
- Austria
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21
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Robledo M, Díaz-Tendero S, Martín F, Alcamí M. Theoretical study of the interaction between molecular hydrogen and [MC60]+ complexes. RSC Adv 2016. [DOI: 10.1039/c6ra00501b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
In this work we present a density functional theory study of the interaction between a positively charged exohedral metallofullerene and several hydrogen molecules.
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Affiliation(s)
- Maitreyi Robledo
- Departamento de Química, Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
| | - Sergio Díaz-Tendero
- Departamento de Química, Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Condensed Matter Physics Center (IFIMAC)
| | - Fernando Martín
- Departamento de Química, Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA_Nanociencia)
| | - Manuel Alcamí
- Departamento de Química, Módulo 13
- Universidad Autónoma de Madrid
- 28049 Madrid
- Spain
- Instituto Madrileño de Estudios Avanzados en Nanociencias (IMDEA_Nanociencia)
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22
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Chehel Amirani M, Tang T. A QM:MM model for the interaction of DNA nucleotides with carbon nanotubes. Phys Chem Chem Phys 2015; 17:7564-75. [PMID: 25708519 DOI: 10.1039/c4cp05222f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Hybrid materials formed by DNA and carbon nanotubes (CNTs) have shown very interesting properties, but their simulation in solution using quantum mechanical approaches is still a challenge in the computational chemistry community. In this paper, we developed a QM:MM model to study the interactions between charged DNA nucleotides and carbon nanotubes in solution. All four types of DNA nucleotides were taken to interact with two CNTs of similar diameter but different chiralities: (4,4) and (7,0). The nucleotides and CNTs were treated at the QM level, while added water and neutralizing ions were modeled at the MM level. ONIOM simulations were performed at the (M06-2X/6-31G(d):Amber) level for the hybrids, as well as for individually solvated CNTs and nucleotides, which allowed us to evaluate the energy of binding. Our binding energy (BE) values range from 146.60 to 503.43 kJ mol(-1), indicating strong physisorption of nucleotides on CNTs. The relatively large BE, compared with past studies on nucleobase-CNT binding in a vacuum, could be due to the larger size of nucleotides compared with nucleobases, the charges on the nucleotides, and the inclusion of solution which causes the release of water molecules upon hybridization.
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23
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Harnisch M, Weinberger N, Denifl S, Scheier P, Echt O. Adsorption of helium on isolated C60and C70anions. Mol Phys 2015. [DOI: 10.1080/00268976.2015.1018357] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Ralser S, Postler J, Harnisch M, Ellis AM, Scheier P. Extracting cluster distributions from mass spectra: IsotopeFit. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 2015; 379:194-199. [PMID: 26109907 PMCID: PMC4461193 DOI: 10.1016/j.ijms.2015.01.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 01/16/2015] [Accepted: 01/19/2015] [Indexed: 05/16/2023]
Abstract
The availability of high resolution mass spectrometry in the study of atomic and molecular clusters opens up challenges for the interpretation of the data. In complex systems each resolved mass peak may contain contributions from multiple species because of the isotope structure of constituent elements and because a multitude of different types of clusters with different compositions are present. A computational procedure which can help to identify a specific cluster from this complex dataset and quantify its relative abundance would be extremely helpful to many who work in this field. Here some new software designed for this purpose, known as IsotopeFit, is described.
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Affiliation(s)
- Stefan Ralser
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25/3, A-6020 Innsbruck, Austria
| | - Johannes Postler
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25/3, A-6020 Innsbruck, Austria
| | - Martina Harnisch
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25/3, A-6020 Innsbruck, Austria
| | - Andrew M. Ellis
- Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, United Kingdom
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstr. 25/3, A-6020 Innsbruck, Austria
- Corresponding author. Tel.: +43 512 507 52660; fax: +43 512 507 2932.
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25
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Bartl P, Leidlmair C, Denifl S, Scheier P, Echt O. On the size and structure of helium snowballs formed around charged atoms and clusters of noble gases. J Phys Chem A 2014; 118:8050-9. [PMID: 24128371 PMCID: PMC4166691 DOI: 10.1021/jp406540p] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2013] [Revised: 09/04/2013] [Indexed: 11/30/2022]
Abstract
Helium nanodroplets doped with argon, krypton, or xenon are ionized by electrons and analyzed in a mass spectrometer. HenNgx(+) ions containing up to seven noble gas (Ng) atoms and dozens of helium atoms are identified; the high resolution of the mass spectrometer combined with advanced data analysis make it possible to unscramble contributions from isotopologues that have the same nominal mass but different numbers of helium or Ng atoms, such as the magic He20(84)Kr2(+) and the isobaric, nonmagic He41(84)Kr(+). Anomalies in these ion abundances reveal particularly stable ions; several intriguing patterns emerge. Perhaps most astounding are the results for HenAr(+), which show evidence for three distinct, solid-like solvation shells containing 12, 20, and 12 helium atoms. This observation runs counter to the common notion that only the first solvation shell is solid-like but agrees with calculations by Galli et al. for HenNa(+) [J. Phys. Chem. A 2011, 115, 7300] that reveal three shells of icosahedral symmetry. HenArx(+) (2 ≤ x ≤ 7) ions appear to be especially stable if they contain a total of n + x = 19 atoms. A sequence of anomalies in the abundance distribution of HenKrx(+) suggests that rings of six helium atoms are inserted into the solvation shell each time a krypton atom is added to the ionic core, from Kr(+) to Kr3(+). Previously reported strong anomalies at He12Kr2(+) and He12Kr3(+) [Kim , J. H.; et al. J. Chem. Phys. 2006, 124, 214301] are attributed to a contamination. Only minor local anomalies appear in the distributions of HenXex(+) (x ≤ 3). The distributions of HenKr(+) and HenXe(+) show strikingly similar, broad features that are absent from the distribution of HenAr(+); differences are tentatively ascribed to the very different fragmentation dynamics of these ions.
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Affiliation(s)
- Peter Bartl
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Christian Leidlmair
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
- Department of Physics, University of New Hampshire, Durham, New Hampshire 03824, United States
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26
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Das R, Chattaraj PK. Gas storage potential of ExBox4+and its Li-decorated derivative. Phys Chem Chem Phys 2014; 16:21964-79. [DOI: 10.1039/c4cp02199a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Sun G, Tangpanitanon J, Shen H, Wen B, Xue J, Wang E, Xu L. Physisorption of molecular hydrogen on carbon nanotube with vacant defects. J Chem Phys 2014; 140:204712. [DOI: 10.1063/1.4879656] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Daxner M, Denifl S, Scheier P, Echt O. Doubly charged CO 2 clusters formed by ionization of doped helium nanodroplets. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 2014; 365-366:200-205. [PMID: 25844051 PMCID: PMC4375666 DOI: 10.1016/j.ijms.2014.01.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 01/05/2014] [Accepted: 01/22/2014] [Indexed: 06/04/2023]
Abstract
Helium nanodroplets are doped with carbon dioxide and ionized by electrons. Doubly charged cluster ions are, for the first time, identified based on their characteristic patterns of isotopologues. Thanks to the high mass resolution, large dynamic range, and a novel method to eliminate contributions from singly charged ions from the mass spectra, we are able to observe doubly charged cluster ions that are smaller than the ones reported in the past. The likely mechanism by which doubly charged ions are formed in doped helium droplets is discussed.
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Affiliation(s)
- Matthias Daxner
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
- Department of Physics, University of New Hampshire, Durham, NH 03824, USA
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29
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Park S, Kwon Y. 4He adsorption on a H(2)-plated C20 molecular surface: the formation of helium buckyballs. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2014; 89:042118. [PMID: 24827204 DOI: 10.1103/physreve.89.042118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Indexed: 06/03/2023]
Abstract
We perform path-integral Monte Carlo calculations to study the adsorption of 4He atoms on a H2-plated C20 molecular surface. It is found that 32 H2 molecules form a complete solid layer on C20, where each H2 molecule is located either above one of the 12 pentagon centers or above one of the 20 carbon atoms. The angular density profiles of the first 4He layer on the (H2)32-C20 surface reveal different quantum states as the number of 4He atoms N varies. Especially, the helium layer exhibits an icosidodecahedron structure for N=30, where each 4He atom is located at one of the vertices of 20 corner-sharing triangles. While the 4He density peaks for N=60 constitute a truncated icosahedron with 12 pentagonal and 20 hexagonal faces, the additional atoms beyond N=60 are found to be placed at the hexagon centers of the truncated icosahedron to form a hexakis truncated icosahedron for N=80. The superfluid response of the 4He layer at a temperature of T=0.6 K is found to be completely quenched for N=30 and to be significantly suppressed for N=60 and 80, reflecting the formation of compact buckyball structures.
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Affiliation(s)
- Sungjin Park
- Division of Quantum Phases and Devices, School of Physics, Konkuk University, Seoul 143-701, Korea
| | - Yongkyung Kwon
- Division of Quantum Phases and Devices, School of Physics, Konkuk University, Seoul 143-701, Korea
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30
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Zöttl S, Kaiser A, Daxner M, Goulart M, Mauracher A, Probst M, Hagelberg F, Denifl S, Scheier P, Echt O. Ordered phases of ethylene adsorbed on charged fullerenes and their aggregates. CARBON 2014; 69:206-220. [PMID: 25843960 PMCID: PMC4375791 DOI: 10.1016/j.carbon.2013.12.017] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 12/03/2013] [Indexed: 06/03/2023]
Abstract
In spite of extensive investigations of ethylene adsorbed on graphite, bundles of nanotubes, and crystals of fullerenes, little is known about the existence of commensurate phases; they have escaped detection in almost all previous work. Here we present a combined experimental and theoretical study of ethylene adsorbed on free C60 and its aggregates. The ion yield of [Formula: see text] measured by mass spectrometry reveals a propensity to form a structurally ordered phase on monomers, dimers and trimers of C60 in which all sterically accessible hollow sites over carbon rings are occupied. Presumably the enhancement of the corrugation by the curvature of the fullerene surface favors this phase which is akin to a hypothetical 1 × 1 phase on graphite. Experimental data also reveal the number of molecules in groove sites of the C60 dimer through tetramer. The identity of the sites, adsorption energies and orientations of the adsorbed molecules are determined by molecular dynamics calculations based on quantum chemical potentials, as well as density functional theory. The decrease in orientational order with increasing temperature is also explored in the simulations whereas in the experiment it is impossible to vary the temperature.
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Affiliation(s)
- Samuel Zöttl
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Alexander Kaiser
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Matthias Daxner
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Marcelo Goulart
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Andreas Mauracher
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Michael Probst
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Frank Hagelberg
- Department of Physics and Astronomy, East Tennessee State University, Johnson City, TN 37614, USA
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, University of Innsbruck, Technikerstrasse 25, A-6020 Innsbruck, Austria
- Department of Physics, University of New Hampshire, Durham, NH 03824, USA
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31
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Tolbatov I, Bartl P, Yurkovich J, Scheier P, Chipman DM, Denifl S, Ptasinska S. Monocarbon cationic cluster yields from N2/CH4 mixtures embedded in He nanodroplets and their calculated binding energies. J Chem Phys 2014; 140:034316. [PMID: 25669388 DOI: 10.1063/1.4861663] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The formation of monocarbon cluster ions has been investigated by electron ionization mass spectrometry of cold helium nanodroplets doped with nitrogen/methane mixtures. Ion yields for two groups of clusters, CHmN2(+) or CHmN4(+), were determined for mixtures with different molecular ratios of CH4. The possible geometrical structures of these clusters were analyzed using electronic structure computations. Little correlation between the ion yields and the associated binding energies has been observed indicating that in most cases kinetic control is more important than thermodynamic control for forming the clusters.
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Affiliation(s)
- Iogann Tolbatov
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Peter Bartl
- Institut für Ionenphysik und Angewandte Physik and Center of Molecular Biosciences Innsbruck, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - James Yurkovich
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik and Center of Molecular Biosciences Innsbruck, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - Daniel M Chipman
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik and Center of Molecular Biosciences Innsbruck, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria
| | - Sylwia Ptasinska
- Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, USA
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32
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Mauracher A, Kaiser A, Probst M, Zöttl S, Daxner M, Postler J, Goulart M, Zappa F, Bohme D, Scheier P. Decorating (C 60) n+, n = 1-3, with CO 2 at low temperatures: Sterically enhanced physisorption. INTERNATIONAL JOURNAL OF MASS SPECTROMETRY 2013; 354-355:271-274. [PMID: 25844047 PMCID: PMC4376293 DOI: 10.1016/j.ijms.2013.06.022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/21/2013] [Accepted: 06/25/2013] [Indexed: 06/04/2023]
Abstract
Multiple attachment of CO2 to the monomer, dimer and trimer cations of C60 has been observed in the mass spectra of He nanodroplets sequentially doped with C60 and CO2 and exposed to electron ionization at 50 eV. Remarkable anomalies were seen in the ion yield for CO2 coverage for (C60)2+(CO2)8 and (C60)3+(CO2)1,2. These provide insight into the influence of steric properties on the nature of physisorption. The enhanced stabilities of (C60)2+(CO2)8 and (C60)3+(CO2)1,2 are attributed to physisorption inside the "groove" of the dimer and the two "dimples" in the trimer cations of C60. Molecular dynamics simulations provide a qualitative assessment of the observed physisorption and a useful visualization of structural aspects.
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Affiliation(s)
- A. Mauracher
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | - A. Kaiser
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | - M. Probst
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | - S. Zöttl
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | - M. Daxner
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | - J. Postler
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
| | - M.M. Goulart
- Departamento de Física, ICE, Universidade Federal de Juiz de Fora, Campus Universitário, Juiz de Fora, MG 36036-330, Brazil
- CAPES Foundation, Ministry of Education of Brazil, Brasília, DF 70040-020, Brazil
| | - F. Zappa
- Departamento de Física, ICE, Universidade Federal de Juiz de Fora, Campus Universitário, Juiz de Fora, MG 36036-330, Brazil
| | - D.K. Bohme
- Department of Chemistry, York University, Toronto, Ontario M3 J 1P3, Canada
| | - P. Scheier
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens-Universität Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria
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Bartl P, Denifl S, Scheier P, Echt O. On the stability of cationic complexes of neon with helium--solving an experimental discrepancy. Phys Chem Chem Phys 2013; 15:16599-604. [PMID: 23958826 DOI: 10.1039/c3cp52550c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Helium nanodroplets are doped with neon and ionized by electrons. The size-dependence of the ion abundance of HenNex(+), identified in high-resolution mass spectra, is deduced for complexes containing up to seven neon atoms and dozens of helium atoms. Particularly stable ions are inferred from anomalies in the abundance distributions. Two pronounced anomalies at n = 11 and 13 in the HenNe(+) series confirm drift-tube data reported by Kojima et al. [T. M. Kojima et al., Z. Phys. D, 1992, 22, 645]. The discrepancy with previously published spectra of neon-doped helium droplets, which did not reveal any abundance anomalies [T. Ruchti et al., J. Chem. Phys., 1998, 109, 10679-10687; C. A. Brindle et al., J. Chem. Phys., 2005, 123, 064312], is most likely due to limited mass resolution, which precluded unambiguous analysis of contributions from different ions with identical nominal mass. However, calculated dissociation energies of HenNe(+) reported so far do not correlate with the present data, possibly because of challenges in correctly treating the linear, asymmetric [He-Ne-He](+) ionic core in HenNe(+). Anomalies identified in the distributions of HenNex(+) for x > 1, including prominent ones at He12Ne2(+) and He14Ne2(+), may help to better understand solvation of Ne(+) and Nex(+) in helium.
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Affiliation(s)
- Peter Bartl
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Technikerstraße 25, A-6020 Innsbruck, Austria.
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Echt O, Kaiser A, Zöttl S, Mauracher A, Denifl S, Scheier P. Adsorption of Polar and Nonpolar Molecules on Isolated Cationic C 60 , C 70 , and Their Aggregates. Chempluschem 2013; 78:910-920. [PMID: 31986748 DOI: 10.1002/cplu.201300198] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 06/26/2013] [Indexed: 11/10/2022]
Abstract
Physisorption on graphite, graphene, nanotubes, and other graphitic structures has been the subject of numerous studies, partly driven by interest in the nature of order in two-dimensional systems, their phase transitions, and the use of graphitic scaffolds for reversible storage of hydrogen at high volumetric density and low mass. In contrast, physisorption on individual fullerenes or small aggregates of fullerenes has remained largely unexplored, last but not least, because of technical challenges. A summary of recent progress in identifying specific adsorption sites on positively charged C60 , C70 , and their aggregates is given in this Minireview. Adsorption energies and storage capacities for helium, hydrogen, methane, oxygen, nitrogen, water, and ammonia are determined. Mass spectrometric data reveal the formation of a commensurate phase in which all hollow sites of C60 or C70 are occupied. This phase is identified for all nonpolar molecules, including oxygen, which does not form a commensurate phase on planar graphite. The polar molecules, on the other hand, do not wet fullerenes and they do not form this commensurate phase. A hierarchy of other distinct adsorption sites are identified for nonpolar molecules, namely, groove sites for fullerene dimers and beyond, and dimple sites for fullerene trimers and beyond. Furthermore, evidence is presented for the preferential adsorption of hydrogen and methane in registered sites on fullerene dimers. The interpretation of experimental data that merely count the number of preferred adsorption sites is aided by molecular dynamics simulations, which utilize interaction potentials derived from ab initio calculations to determine adsorption energies.
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Affiliation(s)
- Olof Echt
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck (Austria).,Department of Physics, University of New Hampshire, Durham, NH 03824 (USA)
| | - Alexander Kaiser
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck (Austria)
| | - Samuel Zöttl
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck (Austria)
| | - Andreas Mauracher
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck (Austria)
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck (Austria)
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität Innsbruck, Techniker Strasse 25, A-6020 Innsbruck (Austria)
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Kaiser A, Zöttl S, Bartl P, Leidlmair C, Mauracher A, Probst M, Denifl S, Echt O, Scheier P. Methane adsorption on aggregates of fullerenes: site-selective storage capacities and adsorption energies. CHEMSUSCHEM 2013; 6:1235-44. [PMID: 23744834 PMCID: PMC3799018 DOI: 10.1002/cssc.201300133] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2013] [Indexed: 05/13/2023]
Abstract
Methane adsorption on positively charged aggregates of C60 is investigated by both mass spectrometry and computer simulations. Calculated adsorption energies of 118-281 meV are in the optimal range for high-density storage of natural gas. Groove sites, dimple sites, and the first complete adsorption shells are identified experimentally and confirmed by molecular dynamics simulations, using a newly developed force field for methane-methane and fullerene-methane interaction. The effects of corrugation and curvature are discussed and compared with data for adsorption on graphite, graphene, and carbon nanotubes.
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Affiliation(s)
- Alexander Kaiser
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Samuel Zöttl
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Peter Bartl
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Christian Leidlmair
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Andreas Mauracher
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Michael Probst
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
| | - Olof Echt
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
- Department of Physics, University of New HampshireDurham, NH 03824 (USA)
| | - Paul Scheier
- Institut für Ionenphysik und Angewandte Physik, Universität InnsbruckTechniker Str. 25, 6020 Innsbruck (Austria)
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