Hydrogen bonding switched symmetric and anti-symmetric vibrations SRS of –CH2 in aqueous DEG solution

Author:

Xue Ruqing1ORCID,Du Hua1ORCID,Zhang Wei2ORCID,Sun Chenglin1,Li Aijun1ORCID,Fang Wenhui3ORCID,Men Zhiwei1ORCID

Affiliation:

1. Key Laboratory of Physics and Technology for Advanced Batteries, College of Physics, Jilin University 1 , Changchun 130012, China

2. School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology 2 , Nanjing 210094, China

3. School of Science, Changchun University of Science and Technology 3 , Changchun 130022, China

Abstract

The symmetric and anti-symmetric stretching vibrations of C–H extensively exist in organic molecules, which constantly arise together in Raman spectroscopy. In this study, a method was presented to switch stimulated Raman scattering peak from symmetric vibrations (2870 cm−1) to anti-symmetric vibrations (2924 cm−1) of –CH2 by regulating the hydrogen bonding (HB) associated through intermolecular and intramolecular in diethylene glycol (DEG) molecules. Such dominant association structure can be converted from DEG-DEG to DEG-H2O in the aqueous DEG solutions. The interaction between H2O and DEG was investigated through the density functional theory calculation. The changes in intermolecular HB have effects on the intramolecular vibrational modes by the intermolecular forces and symmetry of the DEG molecule. This study has exciting potential prospect and can be extended to other mixing solutions.

Funder

National Natural Science Foundation of China

Department of Science and Technology of Jilin Province

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

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