通过拉曼光谱和受激拉曼散射研究 1,2-丙二醇-水二元溶液中的氢键网络动力学。

Hydrogen bonding network dynamics of 1,2-propanediol-water binary solutions by Raman spectroscopy and stimulated Raman scattering.

机构信息

Coherent Light and Atomic and Molecular Spectroscopy Laboratory, College of Physics, Jilin University, Changchun 130012, China.

College of Physics, Jilin Normal University, SiPing 136000, China.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2023 Jan 5;284:121825. doi: 10.1016/j.saa.2022.121825. Epub 2022 Sep 5.

DOI:10.1016/j.saa.2022.121825

PMID:36081192

Abstract

Raman spectroscopy and stimulated Raman scattering (SRS) were used to investigate the hydrogen bonding (HB) network in 1,2-propanediol (1,2-PD)-water binary solutions. Abnormal changes in hydrogen bonds (HBs) were detected when V (volume fraction of the1,2-PD) was 0.4. In the case of Raman spectroscopy, the HB strength of water is weakened and then strengthened with the increase of 1,2-PD volume fraction. In the case of SRS, two new peaks at 3283 cm and 3319 cm were appeared, which demonstrated the appearance of ice-like structures near the methyl group and the weakening of HBs. Based on these phenomena, the HB structure of this binary system underwent a transition from HO-HO to HO-1,2-PD when the V was 0.4 as V increased. This work serves as a reference value for the study of HB networks in alcohol-water binary solutions.

摘要

拉曼光谱和受激拉曼散射（SRS）被用于研究 1,2-丙二醇（1,2-PD）-水二元溶液中的氢键（HB）网络。当 V（1,2-PD 的体积分数）为 0.4 时，氢键（HBs）发生异常变化。在拉曼光谱的情况下，随着 1,2-PD 体积分数的增加，水的 HB 强度先减弱后增强。在 SRS 的情况下，在 3283cm 和 3319cm 处出现了两个新的峰，表明在甲基附近出现了类似冰的结构，HBs 减弱。基于这些现象，当 V 增加到 0.4 时，二元体系的 HB 结构从 HO-HO 转变为 HO-1,2-PD。这项工作为研究醇-水二元溶液中的 HB 网络提供了参考值。