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2D Raman–THz Spectroscopy of Binary CHBr3–MeOH Solvent Mixture


Shalit Kharchenko, Andrey; Mousavi, Seyyed Jabbar; Hamm, Peter (2021). 2D Raman–THz Spectroscopy of Binary CHBr3–MeOH Solvent Mixture. Journal of Physical Chemistry B, 125(2):581-586.

Abstract

Hybrid 2D Raman–terahertz (THz) spectroscopy is used to measure the interactions between two solvents paired in the binary CHBr3–MeOH mixture in the frequency range of 1–7 THz. Changes in the cross peak signature are monitored, originating from the coupling of an intramolecular bending mode of CHBr3 to the collective intermolecular degrees of freedom of the mixture. The appearance of a new cross peak in the 2D spectrum measured for solvent mixture with MeOH molar fraction of 0.3 indicates a coupling to a new set of low-frequency modes formed due to the hydrogen bond interactions between the two solvents. This interpretation is supported by the measurement of the CHBr3–CS2 binary solvent mixture as well as by 1D absorption measurements of neat MeOH.

Abstract

Hybrid 2D Raman–terahertz (THz) spectroscopy is used to measure the interactions between two solvents paired in the binary CHBr3–MeOH mixture in the frequency range of 1–7 THz. Changes in the cross peak signature are monitored, originating from the coupling of an intramolecular bending mode of CHBr3 to the collective intermolecular degrees of freedom of the mixture. The appearance of a new cross peak in the 2D spectrum measured for solvent mixture with MeOH molar fraction of 0.3 indicates a coupling to a new set of low-frequency modes formed due to the hydrogen bond interactions between the two solvents. This interpretation is supported by the measurement of the CHBr3–CS2 binary solvent mixture as well as by 1D absorption measurements of neat MeOH.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Chemistry
Dewey Decimal Classification:540 Chemistry
Scopus Subject Areas:Physical Sciences > Physical and Theoretical Chemistry
Physical Sciences > Surfaces, Coatings and Films
Physical Sciences > Materials Chemistry
Uncontrolled Keywords:Physical and Theoretical Chemistry, Materials Chemistry, Surfaces, Coatings and Films
Language:English
Date:21 January 2021
Deposited On:02 Feb 2021 11:56
Last Modified:03 Feb 2021 21:02
Publisher:American Chemical Society (ACS)
ISSN:1520-5207
OA Status:Closed
Publisher DOI:https://doi.org/10.1021/acs.jpcb.0c08962

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Embargo till: 2022-01-06