酒精混合液的超低频拉曼光谱研究

蒋兹钰; 沈艳婷; 吴家伟; 郭广生; 朱奇峰; 陈卓

doi:doi:10.13883/j.issn1004-5929.202203011

光散射学报, 2022, 34 (3): 256, 网络出版: 2023-02-04

酒精混合液的超低频拉曼光谱研究

Ultra-low Frequency Raman Spectroscopyof Alcohol Mixture

论文大纲

蒋兹钰沈艳婷 ^*吴家伟郭广生朱奇峰陈卓

作者单位

浙江科技学院理学院应用物理系, 杭州 310023

超低频拉曼光谱乙醇甲醇 Ultra-low frequency Raman spectroscopy Ethanol Methanol

摘要

酒精中低浓度甲醇和乙醇的精准检测是十分重要的。低频拉曼散射是研究液相分子间相互作用最有效的方法之一。本文采用新型超低频拉曼光谱, 对不同浓度的乙醇以及乙醇-甲醇混合液进行研究。实验发现, 不同浓度下乙醇溶液在78 cm-1和170 cm-1存在两个特征峰, 不同浓度下乙醇-甲醇混合液在85 cm-1和178 cm-1存在两个特征峰。其中, 78 cm-1特征峰是由于OH-O伸缩振动引起的, 178 cm-1特征峰是由于OH-O面内弯曲振动引起的, 85 cm-1和170 cm-1两个峰是由C-OH的伸缩振动引起的。同时, 我们发现了以上超低频特征峰频率与乙醇以及乙醇-甲醇混合液浓度的依赖关系, 能够为较低浓度的乙醇和甲醇溶液精确指认提供可借鉴的实验思路和依据。

Abstract

Accurate detection of low concentration methanol and ethanol in alcohol is of great importance. Low frequency Raman spectroscopy is one of the most effective methods to study intermolecular interactions in liquid phase. In this letter, a novel ultra-low frequency Raman spectroscopy was designed to study ethanol and ethanol methanol mixture with different concentrations. It was found that there were two Raman characteristic peaks at 78 cm-1 and 170 cm-1 for ethanol solution at different concentrations, and two characteristic peaks at 85 cm-1 and 178 cm-1 for ethanol methanol mixture at different concentrations, of which 78 cm-1 and 85 cm-1 were caused by H-OH vibration, while 85 cm-1 and 178cm-1 were caused by C-OH bond vibration. At the same time, we found the dependence of the above ultra-low frequency Raman peak frequency on the concentration of ethanol and ethanol methanol mixture, which can provide an innovative experimental idea and basis for the accurate identification of lower concentration ethanol and methanol solutions.

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蒋兹钰, 沈艳婷, 吴家伟, 郭广生, 朱奇峰, 陈卓. 酒精混合液的超低频拉曼光谱研究[J]. 光散射学报, 2022, 34(3): 256. JIANG Ziyu, SHEN Yanting, WU Jiawei, GUO Guangsheng, ZHU Qifeng, CHEN Zhuo. Ultra-low Frequency Raman Spectroscopyof Alcohol Mixture[J]. The Journal of Light Scattering, 2022, 34(3): 256.

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