1
|
Dietrich F, Becherer M, Bellaire D, Gerhards M. Exploring structures of small anionic nickel-ethanol clusters with infrared spectroscopy. J Chem Phys 2024; 160:204302. [PMID: 38785285 DOI: 10.1063/5.0208122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2024] [Accepted: 05/08/2024] [Indexed: 05/25/2024] Open
Abstract
Small anionic nickel clusters with ethanol are investigated with a combination of mass-selective infrared photodissociation spectroscopy in a molecular beam and density functional theory simulations at the BLYP/6-311g(d,p) and TPSSh/def2-TZVPP level. In this context, the O-H stretching vibration of the ethanol is analyzed to obtain information about the structural motif, the geometry of the metal core, and the spin state of the clusters. For the [Ni2(EtOH)]- and [Ni3(EtOH)]- clusters, we assign quartet states of motifs with a hydrogen bond from the ethanol to the linear nickel core. The aggregation of a further ethanol molecule, yielding the [Ni3(EtOH)2]- cluster, results in the formation of a cooperative hydrogen bond network between the nickel core and the two ethanol molecules.
Collapse
Affiliation(s)
- F Dietrich
- Department of Physics Science, Universidad de La Frontera, Temuco, Chile
| | - M Becherer
- Department of Chemistry and Research Center Optimas, RPTU, Kaiserslautern, Germany
| | - D Bellaire
- Department of Chemistry and Research Center Optimas, RPTU, Kaiserslautern, Germany
| | - M Gerhards
- Department of Chemistry and Research Center Optimas, RPTU, Kaiserslautern, Germany
| |
Collapse
|
2
|
Dietrich F, Becherer M, Bellaire D, Martínez-Rodríguez P, Gerhards M. Investigating cooperative effects in small cobalt and cobalt-nickel alloy clusters with attached ethanol. Phys Chem Chem Phys 2023; 25:31077-31089. [PMID: 37946573 DOI: 10.1039/d3cp02448b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2023]
Abstract
Small cationic cobalt, and cobalt-nickel alloy clusters with ethanol attached are generated in a pulsed molecular beam experiment using a laser ablation source. While the metal center is successively varied with respect to size and composition, a full-size study of these transition metal clusters is possible. The clusters are investigated via IR photodissociation spectroscopy in the region of OH- and CH-stretching vibrations. The results are compared with theoretical data obtained from DFT calculations. Both frequency shifts and structural changes according to cluster size and composition are identified and discussed in detail, also with respect to cooperative effects. Trimeric metal clusters with an uneven number of nickel atoms show evidence for C-O cleavage of the ethanol molecule. This result is elucidated by further calculations concerning the reactivity, charge and energetic distributions.
Collapse
Affiliation(s)
- Fabian Dietrich
- Departamento de Ciencias Físicas, Universidad de La Frontera, Temuco, Chile.
- Research Center Optimas & Department of Chemistry, Technische Universität Kaiserslautern, Kaiserslautern, Germany
| | - Markus Becherer
- Research Center Optimas & Department of Chemistry, Technische Universität Kaiserslautern, Kaiserslautern, Germany
| | - Daniel Bellaire
- Research Center Optimas & Department of Chemistry, Technische Universität Kaiserslautern, Kaiserslautern, Germany
| | | | - Markus Gerhards
- Research Center Optimas & Department of Chemistry, Technische Universität Kaiserslautern, Kaiserslautern, Germany
| |
Collapse
|
3
|
Das S, Sharma P. Wavelength dependent photoionisation of ethanol clusters: Generation of hydrogen like C 5+ ions at terawatt laser intensity. Phys Chem Chem Phys 2022; 24:11979-11985. [DOI: 10.1039/d2cp00742h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoionisation of ethanol clusters has been investigated at different laser wavelengths over intensity range of ~1012- 1013 W/cm2. At 266 nm ionisation, singly charged fragments and protonated cluster ions (up...
Collapse
|
4
|
Malloum A, Fifen JJ, Conradie J. Exploration of the potential energy surfaces of small ethanol clusters. Phys Chem Chem Phys 2020; 22:13201-13213. [DOI: 10.1039/d0cp01393e] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The potential energy surfaces of small ethanol clusters, from dimer to pentamer, have been thoroughly explored using two different levels of theory. There is a clear relative energy gap between cyclic, linear and branched cyclic structures.
Collapse
Affiliation(s)
- Alhadji Malloum
- Department of Chemistry
- University of the Free State
- Bloemfontein
- South Africa
- Department of Physics
| | - Jean Jules Fifen
- Department of Physics
- Faculty of Science
- The University of Ngaoundere
- Ngaoundere
- Cameroon
| | - Jeanet Conradie
- Department of Chemistry
- University of the Free State
- Bloemfontein
- South Africa
| |
Collapse
|
5
|
Jusko P, Brünken S, Asvany O, Thorwirth S, Stoffels A, van der Meer L, Berden G, Redlich B, Oomens J, Schlemmer S. The FELion cryogenic ion trap beam line at the FELIX free-electron laser laboratory: infrared signatures of primary alcohol cations. Faraday Discuss 2019; 217:172-202. [DOI: 10.1039/c8fd00225h] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The FELion beamline – a cryogenic 22-pole trap for vibrational spectroscopy of molecular ions at the FELIX Laboratory.
Collapse
Affiliation(s)
- Pavol Jusko
- I. Physikalisches Institut
- Universität zu Köln
- 50937 Köln
- Germany
| | - Sandra Brünken
- I. Physikalisches Institut
- Universität zu Köln
- 50937 Köln
- Germany
- Radboud University
| | - Oskar Asvany
- I. Physikalisches Institut
- Universität zu Köln
- 50937 Köln
- Germany
| | - Sven Thorwirth
- I. Physikalisches Institut
- Universität zu Köln
- 50937 Köln
- Germany
| | - Alexander Stoffels
- I. Physikalisches Institut
- Universität zu Köln
- 50937 Köln
- Germany
- Radboud University
| | - Lex van der Meer
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Giel Berden
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Britta Redlich
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Jos Oomens
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | | |
Collapse
|
6
|
Berholts M, Myllynen H, Kooser K, Itälä E, Granroth S, Levola H, Laksman J, Oghbaiee S, Oostenrijk B, Nõmmiste E, Kukk E. Photofragmentation of gas-phase acetic acid and acetamide clusters in the vacuum ultraviolet region. J Chem Phys 2017; 147:194302. [PMID: 29166118 DOI: 10.1063/1.4999686] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photofragmentation of gas-phase acetamide and acetic acid clusters produced by a supersonic expansion source has been studied using time-of-flight mass spectrometry and the partial ion yield (PIY) technique combined with tunable vacuum-ultraviolet synchrotron radiation. Appearance energies of the clusters and their fragments were experimentally determined from the PIY measurements. The effect of clusterization conditions on the formation and fragmentation of acetic acid clusters was investigated. Ab initio quantum mechanical calculations were performed on both samples' dimers to find their neutral and ionized geometries as well as proton transfer energy barriers leading to the optimal geometries. In the case of the acetamide dimer, the reaction resulting in the production of ammoniated acetamide was probed, and the geometry of the obtained ion was calculated.
Collapse
Affiliation(s)
- Marta Berholts
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - Hanna Myllynen
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - Kuno Kooser
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - Eero Itälä
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - Sari Granroth
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - Helena Levola
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| | - Joakim Laksman
- European XFEL, Holzkoppel 4, DE-22869 Schenefeld, Germany
| | - Shabnam Oghbaiee
- Division of Synchrotron Radiation Research, Lund University, Box 118, SE-22100 Lund, Sweden
| | - Bart Oostenrijk
- Division of Synchrotron Radiation Research, Lund University, Box 118, SE-22100 Lund, Sweden
| | - Ergo Nõmmiste
- Department of Physics, University of Tartu, EE-50411 Tartu, Estonia
| | - Edwin Kukk
- Department of Physics and Astronomy, University of Turku, FI-20014 Turku, Finland
| |
Collapse
|
7
|
Shin JW, Bernstein ER. IR + VUV double resonance spectroscopy and extended density functional theory studies of ketone solvation by alcohol: 2-butanone·(methanol) n, n = 1–4 clusters. J Chem Phys 2017; 147:124311. [DOI: 10.1063/1.4995997] [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)
- Joong-Won Shin
- Division of Science, Mathematics, and Technology, Governors State University, University Park, Illinois 60484-0975, USA
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
| | - Elliot R. Bernstein
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
| |
Collapse
|
8
|
Bhattacherjee A, Wategaonkar S. Role of the C(2)–H Hydrogen Bond Donor in Gas-Phase Microsolvation of Imidazole Derivatives with ROH (R = CH3, C2H5). J Phys Chem A 2017; 121:4283-4295. [DOI: 10.1021/acs.jpca.7b03329] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aditi Bhattacherjee
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
| | - Sanjay Wategaonkar
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400 005, India
| |
Collapse
|
9
|
Zhan H, Hu Y, Wang P, Chen J. Dominant conformer of tetrahydropyran-2-methanol and its clusters in the gas phase explored by the use of VUV photoionization and vibrational spectroscopy. J Chem Phys 2017; 146:134303. [DOI: 10.1063/1.4979298] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Huaqi Zhan
- MOE Key laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, People’s Republic of China
| | - Yongjun Hu
- MOE Key laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, People’s Republic of China
| | - Pengchao Wang
- MOE Key laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, People’s Republic of China
| | - Jiaxin Chen
- MOE Key laboratory of Laser Life Science and Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou 510631, People’s Republic of China
| |
Collapse
|
10
|
Zhan H, Hu Y, Wang P, Chen J. Molecular structures of gas-phase neutral morpholine and its monohydrated complexes: experimental and theoretical approaches. RSC Adv 2017. [DOI: 10.1039/c6ra26582k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Morpholine (NH(CH2CH2)2O) is a typical six-membered aliphatic heterocyclic compound.
Collapse
Affiliation(s)
- Huaqi Zhan
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Pengchao Wang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Jiaxin Chen
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| |
Collapse
|
11
|
Wang P, Hu Y, Zhan H, Chen J. Gas-phase conformational preference of the smallest saccharide (glycolaldehyde) and its hydrated complexes with bridged hydrogen bonding. RSC Adv 2017. [DOI: 10.1039/c6ra26965f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Glycoaldehyde (GA, HOCH2CHO) is the simplest sugar unit of the carbohydrates and the only sugar to have been detected in interstellar space to date.
Collapse
Affiliation(s)
- Pengchao Wang
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Huaqi Zhan
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Jiaxin Chen
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| |
Collapse
|
12
|
Tarkanovskaja M, Kooser K, Levola H, Nõmmiste E, Kukk E. Photoinduced intermolecular dynamics and subsequent fragmentation in VUV-ionized acetamide clusters. J Chem Phys 2016; 145:124313. [PMID: 27782678 DOI: 10.1063/1.4963224] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Photofragmentation of small gas-phase acetamide clusters (CH3CONH2)n (n ≤ 10) produced by a supersonic expansion source has been studied using time-of-flight ion mass spectroscopy combined with tunable vacuum-ultraviolet (VUV) synchrotron radiation. Fragmentation channels of acetamide clusters under VUV photoionization resulting in protonated and ammoniated clusters formation were identified with the discussion about the preceding intramolecular rearrangements. Acetamide-2,2,2-d3 clusters were also studied in an experiment with a gas discharge lamp as a VUV light source; comparison with the main experiment gave insights into the mechanism of formation of protonated acetamide clusters, indicating that proton transfer from amino group plays a dominant role in that process. Geometry of the acetamide dimer was discussed and the most stable arrangement was concluded to be achieved when subunits of the dimer are connected via two N-H⋯O -C hydrogen bonds. Also, the influence of the photon energy on the stability of the clusters and their fragmentation channels has been examined.
Collapse
Affiliation(s)
| | - Kuno Kooser
- Department of Physics, University of Tartu, EST-50411 Tartu, Estonia
| | - Helena Levola
- Department of Physics and Astronomy, University of Turku, FIN-20014 Turku, Finland
| | - Ergo Nõmmiste
- Department of Physics, University of Tartu, EST-50411 Tartu, Estonia
| | - Edwin Kukk
- Department of Physics and Astronomy, University of Turku, FIN-20014 Turku, Finland
| |
Collapse
|
13
|
Balanay MP, Kim DH, Fan H. Revisiting the formation of cyclic clusters in liquid ethanol. J Chem Phys 2016; 144:154302. [DOI: 10.1063/1.4945809] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
14
|
Tao Y, Hu Y, Xiao W, Guan J, Liu F, Shan X, Sheng L. Dissociative ionization of the 1-propanol dimer in a supersonic expansion under tunable synchrotron VUV radiation. Phys Chem Chem Phys 2016; 18:13554-63. [DOI: 10.1039/c5cp08026f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Different C–C bond cleavage of the 1-propanol dimer induced by site-selective photoionization under tunable synchrotron VUV radiation.
Collapse
Affiliation(s)
- Yanmin Tao
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Weizhan Xiao
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Jiwen Guan
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science
- College of Biophotonics
- South China Normal University
- Guangzhou 510631
- P. R. China
| | - Fuyi Liu
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Xiaobin Shan
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Liusi Sheng
- National Synchrotron Radiation Laboratory
- University of Science and Technology of China
- Hefei
- P. R. China
| |
Collapse
|
15
|
Umer M, Kopp WA, Leonhard K. Efficient yet accurate approximations forab initiocalculations of alcohol cluster thermochemistry. J Chem Phys 2015; 143:214306. [DOI: 10.1063/1.4936406] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Muhammad Umer
- Lehrstuhl für Technische Thermodynamik, RWTH Aachen University, Aachen 52062, Germany
| | - Wassja A. Kopp
- Lehrstuhl für Technische Thermodynamik, RWTH Aachen University, Aachen 52062, Germany
| | - Kai Leonhard
- Lehrstuhl für Technische Thermodynamik, RWTH Aachen University, Aachen 52062, Germany
| |
Collapse
|
16
|
Pines D, Keinan S, Kiefer PM, Hynes JT, Pines E. Effect of Solvent Dielectric Constant and Acidity on the OH Vibration Frequency in Hydrogen-Bonded Complexes of Fluorinated Ethanols. J Phys Chem B 2014; 119:9278-86. [DOI: 10.1021/jp509914w] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dina Pines
- Department
of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 84105, Israel
| | - Sharon Keinan
- Department
of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 84105, Israel
| | - Philip M. Kiefer
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - James T. Hynes
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
- Chemistry
Department, École Normale Supérieure, UMR ENS-CNRS-UPMC 8640, 24 rue Lhomond, 75005 Paris, France
| | - Ehud Pines
- Department
of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Beer-Sheva, 84105, Israel
| |
Collapse
|
17
|
Gadre SR, Yeole SD, Sahu N. Quantum chemical investigations on molecular clusters. Chem Rev 2014; 114:12132-73. [PMID: 25341561 DOI: 10.1021/cr4006632] [Citation(s) in RCA: 147] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Shridhar R Gadre
- Department of Chemistry, Indian Institute of Technology Kanpur , Kanpur 208 016, India
| | | | | |
Collapse
|
18
|
Li W, Hu Y, Liu F, Shan X, Sheng L. Site-selective dissociation processes of cationic ethanol conformers: the role of hyperconjugation. J Phys Chem A 2014; 118:7096-103. [PMID: 25080068 DOI: 10.1021/jp5035568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In present report, we explored hyperconjugation effects on the site- and bond-selective dissociation processes of cationic ethanol conformers by the use of theoretical methods (including configuration optimizations, natural bond orbital (NBO) analysis, and density of states (DOS) calculations, etc.) and the tunable synchrotron vacuum ultraviolet (SVUV) photoionization mass spectrometry. The dissociative mechanism of ethanol cations, in which hyperconjugative interactions and charge-transfer processes were involved, was proposed. The results reveal Cα-H and C-C bonds are selectively weakened, which arise as a result of the hyperconjugative interactions σCα-H → p in the trans-conformer and σC-C → p in gauche-conformer after being ionized. As a result, the selective bond cleavages would occur and different fragments were observed.
Collapse
Affiliation(s)
- Weixing Li
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University , Guangzhou 510631, P. R. China
| | | | | | | | | |
Collapse
|
19
|
Kiefer PM, Pines E, Pines D, Hynes JT. Solvent-Induced Red-Shifts for the Proton Stretch Vibrational Frequency in a Hydrogen-Bonded Complex. 1. A Valence Bond-Based Theoretical Approach. J Phys Chem B 2014; 118:8330-51. [DOI: 10.1021/jp501815j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Philip M. Kiefer
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
| | - Ehud Pines
- Department
of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Be’er
Sheva, 84105, Israel
| | - Dina Pines
- Department
of Chemistry, Ben-Gurion University of the Negev, P.O. Box 653, Be’er
Sheva, 84105, Israel
| | - James T. Hynes
- Department
of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309-0215, United States
- Chemistry
Department, École Normale Supérieure, UMR ENS-CNRS-UPMC 8640, 24 rue Lhomond, 75005 Paris, France
| |
Collapse
|
20
|
Hu Y, Guan J, Bernstein ER. Mass-selected IR-VUV (118 nm) spectroscopic studies of radicals, aliphatic molecules, and their clusters. MASS SPECTROMETRY REVIEWS 2013; 32:484-501. [PMID: 24122973 DOI: 10.1002/mas.21387] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Revised: 04/25/2013] [Accepted: 04/25/2013] [Indexed: 06/02/2023]
Abstract
Mass-selected IR plus UV/VUV spectroscopy and mass spectrometry have been coupled into a powerful technique to investigate chemical, physical, structural, and electronic properties of radicals, molecules, and clusters. Advantages of the use of vacuum ultraviolet (VUV) radiation to create ions for mass spectrometry are its application to nearly all compounds with ionization potentials below the energy of a single VUV photon, its circumventing the requirement of UV chromophore group, its inability to ionize background gases, and its greatly reduced fragmenting capabilities. In this review, mass-selected IR plus VUV (118 nm) spectroscopy is introduced first in a general manner. Selected application examples of this spectroscopy are presented, which include the detections and structural analysis of radicals, molecules, and molecular clusters in a supersonic jet.
Collapse
Affiliation(s)
- Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, College of Biophotonics, South China Normal University, Guangzhou, 510631, China
| | | | | |
Collapse
|
21
|
Aguado E, León I, Millán J, Cocinero EJ, Jaeqx S, Rijs AM, Lesarri A, Fernández JA. Unraveling the Benzocaine–Receptor Interaction at Molecular Level Using Mass-Resolved Spectroscopy. J Phys Chem B 2013; 117:13472-80. [DOI: 10.1021/jp4068944] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Edurne Aguado
- Departamento de Química
Física, Facultad de Ciencia
y Tecnología, Universidad del País Vasco (UPV/EHU), B°
Sarriena s/n, 48940 Leioa, Spain
| | - Iker León
- Departamento de Química
Física, Facultad de Ciencia
y Tecnología, Universidad del País Vasco (UPV/EHU), B°
Sarriena s/n, 48940 Leioa, Spain
| | - Judith Millán
- Departamento
de Química, Facultad de
Ciencias, Estudios Agroalimentarios
e Informática, Universidad de La Rioja, Madre de Dios,
51, 26006 Logroño, Spain
| | - Emilio J. Cocinero
- Departamento de Química
Física, Facultad de Ciencia
y Tecnología, Universidad del País Vasco (UPV/EHU), B°
Sarriena s/n, 48940 Leioa, Spain
| | - Sander Jaeqx
- Radboud
University Nijmegen, Institute for Molecules and Materials, FELIX Facility, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Anouk M. Rijs
- Radboud
University Nijmegen, Institute for Molecules and Materials, FELIX Facility, Toernooiveld 7, 6525 ED Nijmegen, The Netherlands
| | - Alberto Lesarri
- Departamento de Química Física y Química
Inorgánica, Facultad de
Ciencias, Universidad de Valladolid, E-47011 Valladolid, Spain
| | - José A. Fernández
- Departamento de Química
Física, Facultad de Ciencia
y Tecnología, Universidad del País Vasco (UPV/EHU), B°
Sarriena s/n, 48940 Leioa, Spain
| |
Collapse
|
22
|
Li W, Hu Y, Guan J, Liu F, Shan X, Sheng L. Site-selective ionization of ethanol dimer under the tunable synchrotron VUV radiation and its subsequent fragmentation. J Chem Phys 2013; 139:024307. [DOI: 10.1063/1.4812780] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
23
|
Wen H, Liu YR, Huang T, Xu KM, Zhang WJ, Huang W, Wang LS. Observation of linear to planar structural transition in sulfur-doped gold clusters: AuxS−(x= 2–5). J Chem Phys 2013; 138:174303. [DOI: 10.1063/1.4802477] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
24
|
Gu Q, Trindle C, Knee JL. Communication: Frequency shifts of an intramolecular hydrogen bond as a measure of intermolecular hydrogen bond strengths. J Chem Phys 2013; 137:091101. [PMID: 22957541 DOI: 10.1063/1.4752246] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Infrared-ultraviolet double resonance spectroscopy has been applied to study the infrared spectra of the supersonically cooled gas phase complexes of formic acid, acetic acid, propionic acid, formamide, and water with 9-hydroxy-9-fluorenecarboxylic acid (9HFCA), an analog of glycolic acid. In these complexes each binding partner to 9HFCA can function as both proton donor and acceptor. Relative to its frequency in free 9HFCA, the 9-hydroxy (9OH) stretch is blue shifted in complexes with formic, acetic, and propionic acids, but is red shifted in the complexes with formamide and water. Density functional calculations on complexes of 9HFCA to a variety of H bonding partners with differing proton donor and acceptor abilities reveal that the quantitative frequency shift of the 9OH can be attributed to the balance struck between two competing intermolecular H bonds. More extensive calculations on complexes of glycolic acid show excellent consistency with the experimental frequency shifts.
Collapse
Affiliation(s)
- Quanli Gu
- Chemistry Department, University of Virginia, Charlottesville, Virginia 22904, USA
| | | | | |
Collapse
|
25
|
Fu L, Han HL, Lee YP. Infrared absorption of methanethiol clusters (CH3SH)n, n = 2–5, recorded with a time-of-flight mass spectrometer using IR depletion and VUV ionization. J Chem Phys 2012; 137:234307. [DOI: 10.1063/1.4770227] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
26
|
Guan J, Hu Y, Zou H, Cao L, Liu F, Shan X, Sheng L. Competitive fragmentation pathways of acetic acid dimer explored by synchrotron VUV photoionization mass spectrometry and electronic structure calculations. J Chem Phys 2012; 137:124308. [DOI: 10.1063/1.4754273] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
27
|
Guan J, Hu Y, Xie M, Bernstein ER. Weak carbonyl-methyl intermolecular interactions in acetone clusters explored by IR plus VUV spectroscopy. Chem Phys 2012. [DOI: 10.1016/j.chemphys.2012.06.017] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
28
|
Bhattacharya A, Bernstein ER. Influence of Turn (or Fold) and Local Charge in Fragmentation of the Peptide Analogue Molecule CH3CO-Gly-NH2 Following Single-Photon VUV (118.22 nm) Ionization. J Phys Chem A 2011; 115:10679-88. [DOI: 10.1021/jp203909y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Atanu Bhattacharya
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Elliot R. Bernstein
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| |
Collapse
|
29
|
Tamenori Y, Okada K, Tabayashi K, Hiraya A, Gejo T, Honma K. Photodissociation investigation of doubly charged ethanol clusters induced by inner-shell electron ionization. J Chem Phys 2011; 134:204302. [DOI: 10.1063/1.3590164] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
|
30
|
Han HL, Camacho C, Witek HA, Lee YP. Infrared absorption of methanol clusters (CH3OH)n with n = 2−6 recorded with a time-of-flight mass spectrometer using infrared depletion and vacuum-ultraviolet ionization. J Chem Phys 2011; 134:144309. [DOI: 10.1063/1.3572225] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
31
|
Nedić M, Wassermann TN, Larsen RW, Suhm MA. A combined Raman- and infrared jet study of mixed methanol-water and ethanol-water clusters. Phys Chem Chem Phys 2011; 13:14050-63. [PMID: 21491035 DOI: 10.1039/c1cp20182d] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The vibrational dynamics of vacuum-isolated hydrogen-bonded complexes between water and the two simplest alcohols is characterized at low temperatures by Raman and FTIR spectroscopy. Conformational preferences during adaptive aggregation, relative donor/acceptor strengths, weak secondary hydrogen bonding, tunneling processes in acceptor lone pair switching, and thermodynamic anomalies are elucidated. The ground state tunneling splitting of the methanol-water dimer is predicted to be larger than 2.5 cm(-1). Two types of alcohol-water trimers are identified from the spectra. It is shown that methanol and ethanol are better hydrogen bond donors than water, but even more so better hydrogen bond acceptors. As a consequence, hydrogen bond induced red shifts of OH modes behave non-linearly as a function of composition and the resulting cluster excess quantities correspond nicely to bulk excess enthalpies at room temperature. The effects of weak C-H···O hydrogen bonds are quantified in the case of mixed ethanol-water dimers.
Collapse
Affiliation(s)
- Marija Nedić
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstr. 6, 37077 Göttingen, Germany
| | | | | | | |
Collapse
|
32
|
Bialach PM, Funk A, Weiler M, Gerhards M. IR spectroscopy on isolated Co(n)(alcohol)m cluster anions (n=1-4, m=1-3): structures and spin states. J Chem Phys 2011; 133:194304. [PMID: 21090859 DOI: 10.1063/1.3502096] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Isolated cobalt-alcohol cluster anions containing n=1-4 cobalt and m=1-3 alcohol molecules (alcohol=methanol, ethanol, propanol) are produced in a supersonic beam by using a laser ablation source. By applying IR photodissociation spectroscopy vibrational spectra in the OH stretching region are obtained. Several structures in different spin states are discussed for the (n,m) clusters. In comparison with density functional theory calculations applied to both the Co/alcohol clusters and the naked Co cluster anions, an unambiguous structural assignment is achieved. It turns out that structures are preferred with a maximum number of hydrogen bonds between the OH groups and the Co···Co units. These hydrogen bonds are typical for anionic species leading to an activation of the OH groups which is indicated by large red-shifts of the OH stretching frequencies compared to the naked alcohols. For each (n,m) cluster, the frequency shifts systematically with respect to the different alcohols, but the type of structure is identical for all alcohol ligands. The application of IR spectroscopy turns out to be an ideal tool not only as a probe for structures but also for spin states which significantly influence the predicted OH stretching frequencies.
Collapse
Affiliation(s)
- P M Bialach
- Fachbereich Chemie and Research Center OPTIMAS, TU Kaiserslautern, Erwin-Schroedinger-Straße 52, D-67663 Kaiserslautern, Germany
| | | | | | | |
Collapse
|
33
|
Wassermann TN, Suhm MA. Ethanol Monomers and Dimers Revisited: A Raman Study of Conformational Preferences and Argon Nanocoating Effects. J Phys Chem A 2010; 114:8223-33. [DOI: 10.1021/jp104861q] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tobias N. Wassermann
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, 37077 Göttingen, Germany
| | - Martin A. Suhm
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstrasse 6, 37077 Göttingen, Germany
| |
Collapse
|
34
|
Bhattacharya A, Shin JW, Clawson KJ, Bernstein ER. Conformation specific and charge directed reactivity of radical cation intermediates of α-substituted (amino, hydroxy, and keto) bioactive carboxylic acids. Phys Chem Chem Phys 2010; 12:9700-12. [DOI: 10.1039/c003416a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
35
|
Hu Y, Bernstein ER. Vibrational and Photoionization Spectroscopy of Neutral Valine Clusters. J Phys Chem A 2009; 113:8454-61. [DOI: 10.1021/jp901208f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongjun Hu
- MOE Key Lab of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, P. R. China, and Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - Elliot R. Bernstein
- MOE Key Lab of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, P. R. China, and Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| |
Collapse
|
36
|
Shin JW, Bernstein ER. Experimental and theoretical studies of isolated neutral and ionic 2-propanol and their clusters. J Chem Phys 2009; 130:214306. [DOI: 10.1063/1.3148378] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
37
|
Liu Y, Consta S, Shi Y, Lipson RH, Goddard WA. Prediction of the Size Distributions of Methanol−Ethanol Clusters Detected in VUV Laser/Time-of-Flight Mass Spectrometry. J Phys Chem A 2009; 113:6865-75. [DOI: 10.1021/jp900487x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Yi Liu
- Materials and Process Simulation Center (M/C 139-74), California Institute of Technology, 1200 East California Boulevard., Pasadena, California, 91125, Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7, and Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Styliani Consta
- Materials and Process Simulation Center (M/C 139-74), California Institute of Technology, 1200 East California Boulevard., Pasadena, California, 91125, Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7, and Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - Yujun Shi
- Materials and Process Simulation Center (M/C 139-74), California Institute of Technology, 1200 East California Boulevard., Pasadena, California, 91125, Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7, and Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - R. H. Lipson
- Materials and Process Simulation Center (M/C 139-74), California Institute of Technology, 1200 East California Boulevard., Pasadena, California, 91125, Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7, and Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| | - William A. Goddard
- Materials and Process Simulation Center (M/C 139-74), California Institute of Technology, 1200 East California Boulevard., Pasadena, California, 91125, Department of Chemistry, The University of Western Ontario, London, Ontario, Canada N6A 5B7, and Department of Chemistry, University of Calgary, Calgary, Alberta, Canada T2N 1N4
| |
Collapse
|
38
|
Hu Y, Bernstein ER. Photoionization and Vibrational Spectroscopy of the Aniline−Methanol Clusters. J Phys Chem A 2009; 113:639-43. [DOI: 10.1021/jp807049e] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yongjun Hu
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, People’s Republic of China, and Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| | - Elliot R. Bernstein
- MOE Key Laboratory of Laser Life Science & Institute of Laser Life Science, South China Normal University, Guangzhou 510631, People’s Republic of China, and Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872
| |
Collapse
|
39
|
Matsuda Y, Mikami N, Fujii A. Vibrational spectroscopy of size-selected neutral and cationic clusters combined with vacuum-ultraviolet one-photon ionization detection. Phys Chem Chem Phys 2009; 11:1279-90. [DOI: 10.1039/b815257h] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
40
|
Bialach PM, Braun M, Lüchow A, Gerhards M. Structures of isolated Co2(alcohol)1 cluster anions. Phys Chem Chem Phys 2009; 11:10403-8. [DOI: 10.1039/b912703h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
41
|
|
42
|
Hu Y, Bernstein ER. Vibrational and photoionization spectroscopy of biomolecules: Aliphatic amino acid structures. J Chem Phys 2008; 128:164311. [DOI: 10.1063/1.2902980] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
|
43
|
Liu Y, Consta S, Ogeer F, Shi YJ, Lipson RH. Geometries and energetics of methanol–ethanol clusters: a VUV laser/time-of-flight mass spectrometry and density functional theory study. CAN J CHEM 2007. [DOI: 10.1139/v07-104] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Hydrogen-bonded clusters, formed above liquid methanol (Me) and ethanol (Et) mixtures of various compositions, were entrained in a supersonic jet and probed using 118 nm vacuum ultraviolet (VUV) laser single-photon ionization/time-of-flight mass spectrometry. The spectra are dominated by protonated cluster ions, formed by ionizing hydrogen-bonded MemEtn neutrals, m = 0–4, n = 0–3, and m + n = 2–5. The structures and energetics of the neutral and ionic species were investigated using both the all-atom optimized potential for liquid state, OPLS-AA, and the density functional (DFT) calculations. The energetic factors affecting the observed cluster distributions were examined. Calculations indicate that the large change in binding energy going from trimer to tetramer can be attributed more to pair-wise interactions than to cooperativity effects.Key words: alcohol clusters, cluster formation, DFT calculations, mass spectrometry, vacuum ultraviolet laser.
Collapse
|
44
|
|
45
|
Hu YJ, Fu HB, Bernstein ER. IR plus vacuum ultraviolet spectroscopy of neutral and ionic organic acid monomers and clusters: Propanoic acid. J Chem Phys 2006; 125:184309. [PMID: 17115754 DOI: 10.1063/1.2378628] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The vibrational spectrum of molecular propanoic acid, cooled in a supersonic expansion, in the region of 2500 to 7500 cm(-1) is obtained employing infrared plus vacuum ultraviolet nonresonant ionization detected spectroscopy. The fundamental and first overtone of the CH and OH stretch modes of cold propanoic acid molecules can be identified in the spectrum. Propanoic acid neutral and ionic clusters are also studied employing nonresonant ion dip and photodissociation spectroscopic techniques, respectively. For the neutral dimer, a sequence of features observed at ca. 2500-2700 cm(-1) can be assigned as combination bands of low frequency modes with the COH bending overtone; these features characterize the cyclic dimer ring structure. IR spectra of the larger neutral clusters n=3, 4, 5 indicate that they also have cyclic structures in which the OH groups are engaged in the cluster hydrogen bonding network. The CH groups are not involved in this hydrogen bonding structure. Free OH features are observed for the protonated ion clusters (C(2)H(5)COOH)(n)H(+), n=1,...,5, indicating that at least one OH group of these cluster ions is not involved in the cluster hydrogen bonding network. A comparison of the results for four hydrogen bonding neutral and ionic clusters (CH(3)OH, C(2)H(5)OH, CH(3)COOH, and C(2)H(5)COOH) is presented and discussed.
Collapse
Affiliation(s)
- Y J Hu
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
| | | | | |
Collapse
|