文献类型：期刊文献

英文题名：Low-frequency vibrations of indole derivatives by terahertz time-domain spectroscopy

作者：Dang, Ya-Ru[1]; Li, Shao-Ping[1]; Liu, Hui[1]; Li, Shao-Xian[2]; Zhang, Jian-Bing[3]; Zhao, Hong-Wei[3]

机构：[1] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] School of Precision Instrument and Optoelectronics Engineering, Tianjin University, Tianjin, 300072, China; [3] Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China

年份：2016

卷号：14

期号：4

起止页码：329

外文期刊名：Journal of Electronic Science and Technology

收录：EI(收录号：20231213759227)

语种：英文

外文关键词：Density functional theory - Plasmons - Polycyclic aromatic hydrocarbons - Propionic acid - Reflectometers - Refractive index - Spectrophotometers - Temperature distribution

摘要：Several indole derivatives with different '3-' substituents have been investigated by terahertz (THz) time-domain spectroscopy. The low-frequency absorption spectra and refractive indices were obtained in the range of 0.2 THz to 2.5 THz (7 cm-1 to 83 cm-1). These derivatives with different substituents present distinct features, which suggests that THz spectroscopy is sensitive to different structures and components of these chemicals. The density functional theory was employed to calculate the low-frequency vibrational properties of indole-3-carboxylic acid and indole-3-propionic acid based on their crystal structures, and the intermolecular interactions were involved. Meanwhile, the temperature dependence of the spectra agreed with the calculated results. The quantitative analysis of a ternary mixture was studied by taking the THz fingerprints into account, and the results demonstrate THz spectroscopy has great potential for the practical applications in biochemistry and pharmaceutics.