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