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Huang QR, Yano K, Yang Y, Fujii A, Kuo JL. Near-infrared spectroscopy of H 3O +⋯X n (X = Ar, N 2, and CO, n = 1-3). Phys Chem Chem Phys 2024; 26:10757-10768. [PMID: 38516880 DOI: 10.1039/d4cp00458b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2024]
Abstract
Near-infrared (NIR) spectra of H3O+⋯Xn (X = Ar, N2, and CO, n = 1-3) in the first overtone region of OH-stretching vibrations (4800-7000 cm-1) were measured. Not only OH-stretching overtones but also several combination bands are major features in this region, and assignments of these observed bands are not obvious at a glance. High-precision anharmonic vibrational simulations based on the discrete variable representation approach were performed. The simulated spectra show good agreement with the observed ones and provide firm assignments of the observed bands, except in the case of X = CO, in which higher order vibrational mode couplings seem significant. This agreement demonstrates that the present system can be a benchmark for high precision anharmonic vibrational computations of NIR spectra. Band broadening in the observed spectra becomes remarkable with an increase of the interaction with the solvent molecule (X). The origin of the band broadening is explored by rare gas tagging experiments and anharmonic vibrational simulations of hot bands.
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Affiliation(s)
- Qian-Rui Huang
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan.
| | - Kazuyoshi Yano
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan.
| | - Yaodi Yang
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan.
| | - Asuka Fujii
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, Japan.
| | - Jer-Lai Kuo
- Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei, Taiwan.
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Yang N, Huchmala RM, McCoy AB, Johnson MA. Character of the OH Bend-Stretch Combination Band in the Vibrational Spectra of the "Magic" Number H 3O +(H 2O) 20 and D 3O +(D 2O) 20 Cluster Ions. J Phys Chem Lett 2022; 13:8116-8121. [PMID: 35998327 DOI: 10.1021/acs.jpclett.2c02318] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The fundamental transitions that contribute to the diffuse OH stretching spectrum of water are known to increase in width and intensity with increasing red shift from the free OH frequency. In contrast, the profile of the higher-energy combination band involving the OH stretching and the intramolecular HOH bending modes displays a qualitatively different spectral shape with a much faster falloff on the lower-energy side. We elucidate the molecular origin of this difference by analyzing the shapes of the combination bands in the IR spectra of cryogenically cooled H3O+(H2O)20 and D3O+(D2O)20 clusters. The difference in the shapes of the bands is traced to differences in the dependence of their transition dipole matrix elements on the hydrogen-bonding environment. The fact that individual transitions across the combination band envelope have similar intensities makes it a useful way to determine the participation of various sites in extended H-bonding networks.
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Affiliation(s)
- Nan Yang
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
| | - Rachel M Huchmala
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Anne B McCoy
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Mark A Johnson
- Sterling Chemistry Laboratory, Yale University, New Haven, Connecticut 06520, United States
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McDonald DC, Wagner JP, McCoy AB, Duncan MA. Near-Infrared Spectroscopy and Anharmonic Theory of Protonated Water Clusters: Higher Elevations in the Hydrogen Bonding Landscape. J Phys Chem Lett 2018; 9:5664-5671. [PMID: 30205006 DOI: 10.1021/acs.jpclett.8b02499] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Near-infrared spectroscopy measurements are presented for protonated water clusters, H+(H2O) n, in the size range of n = 1-8. Clusters are produced in a pulsed-discharge supersonic expansion, mass selected, and studied with infrared laser photodissociation spectroscopy in the regions of 3600-4550 and 4850-7350 cm-1. Although there is some variation with cluster size, the main features of these spectra are a broad absorption near 5300 cm-1, a sharp doublet near 7200 cm-1, as well as a structured absorption near 4100 cm-1 for n ≥ 2. The vibrational patterns measured for the hydronium, Zundel, and Eigen ions are compared to those predicted by different forms of anharmonic theory. Second-order vibrational perturbation theory (VPT2) and a local mode treatment of the OH stretches both capture key aspects of the spectra but suffer understandable deficiencies in the quantitative description of band positions and intensities.
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Affiliation(s)
- D C McDonald
- Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
| | - J P Wagner
- Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
| | - A B McCoy
- Department of Chemistry , University of Washington , Seattle , Washington 98195 , United States
| | - M A Duncan
- Department of Chemistry , University of Georgia , Athens , Georgia 30602 , United States
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Wagner JP, McDonald DC, Duncan MA. Near-infrared spectroscopy and anharmonic theory of the H2O+Ar1,2 cation complexes. J Chem Phys 2017; 147:104302. [DOI: 10.1063/1.4998419] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- J. Philipp Wagner
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, Georgia 30602, USA
| | - David C. McDonald
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, Georgia 30602, USA
| | - Michael A. Duncan
- Department of Chemistry, University of Georgia, 140 Cedar Street, Athens, Georgia 30602, USA
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Nguyen QC, Ong YS, Kuo JL. A Hierarchical Approach to Study the Thermal Behavior of Protonated Water Clusters H+(H2O)n. J Chem Theory Comput 2009; 5:2629-39. [DOI: 10.1021/ct900123d] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Quoc Chinh Nguyen
- School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore, School of Computer Engineering, Nanyang Technological University, 639798, Singapore, and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Yew-Soon Ong
- School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore, School of Computer Engineering, Nanyang Technological University, 639798, Singapore, and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Jer-Lai Kuo
- School of Physical and Mathematical Sciences, Nanyang Technological University, 637371, Singapore, School of Computer Engineering, Nanyang Technological University, 639798, Singapore, and Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
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Prell JS, Williams ER. Structures of Thermal, Mass-Selected Water Clusters Probed with Hydrophobic Ion Tags and Infrared Photodissociation Spectroscopy. J Am Chem Soc 2009; 131:4110-9. [DOI: 10.1021/ja809414a] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- James S. Prell
- Department of Chemistry, University of California, Berkeley, California 94720-1460
| | - Evan R. Williams
- Department of Chemistry, University of California, Berkeley, California 94720-1460
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Suhara KI, Fujii A, Mizuse K, Mikami N, Kuo JL. Compatibility between methanol and water in the three-dimensional cage formation of large-sized protonated methanol-water mixed clusters. J Chem Phys 2007; 126:194306. [PMID: 17523803 DOI: 10.1063/1.2734969] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Infrared spectra of large-sized protonated methanol-water mixed clusters, H(+)(MeOH)(m)(H(2)O)(n) (m=1-4, n=4-22), were measured in the OH stretch region. The free OH stretch bands of the water moiety converged to a single peak due to the three-coordinated sites at the sizes of m+n=21, which is the magic number of the protonated water cluster. This is a spectroscopic signature for the formation of the three-dimensional cage structure in the mixed cluster, and it demonstrates the compatibility of a small number of methanol molecules with water in the hydrogen-bonded cage formation. Density functional theory calculations were carried out to examine the relative stability and structures of selected isomers of the mixed clusters. The calculation results supported the microscopic compatibility of methanol and water in the hydrogen-bonded cage development. The authors also found that in the magic number clusters, the surface protonated sites are energetically favored over their internal counterparts and the excess proton prefers to take the form of H(3)O(+) despite the fact that the proton affinity of methanol is greater than that of water.
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Affiliation(s)
- Ken-ichiro Suhara
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan
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Chang HC, Wu CC, Kuo JL. Recent advances in understanding the structures of medium-sized protonated water clusters. INT REV PHYS CHEM 2005. [DOI: 10.1080/01442350500448116] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Mella M, Clary DC. Zero temperature quantum properties of small protonated water clusters (H2O)nH+ (n=1–5). J Chem Phys 2003. [DOI: 10.1063/1.1618222] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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