The coupling between the symmetric (νs) and antisymmetric (νa) OD stretch modes of monomeric D2O in CHCl3 is investigated using polarization-dependent two-dimensional infrared (2D IR) spectroscopy supported by numerical 2D IR simulations based on the exciton-band theory. The relationship between the local modes’ and the exciton states’ parameters is systematically studied, including center frequencies, diagonal anharmonicities, coupling, and off-diagonal anharmonicity. The mean coupling between νs and νa is accurately evaluated to be −49.96 ± 0.14 cm−1. The degree of relaxation in the harmonic approximation is quantified, and the angle between the exciton-state dipoles is accurately evaluated to be 101.4° ± 3.6°. In addition, the effect of the local-mode frequency correlation on the resulting exciton-state frequency correlation and the spectral shape of the linear and 2D IR spectra are also investigated.
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7 June 2023
Research Article|
June 01 2023
Systematic investigation of coupling between symmetric and antisymmetric stretches of D2O in CHCl3 by 2D IR
Special Collection:
Celebrating 25 Years of Two-dimensional Infrared (2D IR) Spectroscopy
Hyejin Kwon
;
Hyejin Kwon
(Conceptualization, Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review & editing)
1
Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST)
, 50 UNIST-gil, Ulsan 44919, Korea
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Koji Osawa
;
Koji Osawa
(Conceptualization, Formal analysis, Investigation, Methodology, Writing – original draft, Writing – review & editing)
2
Department of Physics, Sogang University
, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea
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Jin Gyu Seol
;
Jin Gyu Seol
(Investigation, Methodology, Writing – review & editing)
1
Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST)
, 50 UNIST-gil, Ulsan 44919, Korea
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Siheon Sung
;
Siheon Sung
(Investigation)
2
Department of Physics, Sogang University
, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea
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Doseok Kim
;
Doseok Kim
a)
(Conceptualization, Formal analysis, Funding acquisition, Methodology, Project administration, Supervision, Writing – original draft, Writing – review & editing)
2
Department of Physics, Sogang University
, 35 Baekbeom-ro, Mapo-gu, Seoul 04107, Korea
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Yung Sam Kim
Yung Sam Kim
a)
(Conceptualization, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing)
1
Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST)
, 50 UNIST-gil, Ulsan 44919, Korea
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Note: This paper is part of the JCP Special Topic on Celebrating 25 Years of Two-Dimensional Infrared (2D IR) Spectroscopy.
J. Chem. Phys. 158, 214303 (2023)
Article history
Received:
January 16 2023
Accepted:
May 11 2023
Citation
Hyejin Kwon, Koji Osawa, Jin Gyu Seol, Siheon Sung, Doseok Kim, Yung Sam Kim; Systematic investigation of coupling between symmetric and antisymmetric stretches of D2O in CHCl3 by 2D IR. J. Chem. Phys. 7 June 2023; 158 (21): 214303. https://doi.org/10.1063/5.0142700
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