Terahertz Spectroscopy of Biotin and Pyridoxine

被引：2

作者：

Jiang Ling ^{[1
]}

Li Miao ^{[1
]}

Li Chun ^{[1
]}

Sun Hai-jun ^{[2
]}

Xu Li ^{[2
]}

Liu Yun-fei

机构：

[1] Nanjing Forestry Univ, Coll Informat Sci & Technol, Nanjing 210037, Jiangsu, Peoples R China

[2] Nanjing Forestry Univ, Adv Anal & Testing Ctr, Nanjing 210037, Jiangsu, Peoples R China

来源：

SPECTROSCOPY AND SPECTRAL ANALYSIS | 2015年 / 35卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Fourier transform infrared spectroscopy; Biotin; Pyridoxine; DFT method;

D O I：

10.3964/j.issn.1000-0593(2015)10-2946-06

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

Terahertz (THz) absorption spectra of the biotin and pyridoxine were studied using Fourier transform infrared spectroscopy (FTIR) at room temperature. These spectra exhibit enhanced absorption in THz range because of strong intramolecular and intermolecular vibration modes. In the experiment, the samples were mixed with high density polyethylene powder, which was used as spectrophotometric grid. The absorption spectra show worse consistency at higher frequencies for the high ratio of the samples to polyethylene. It indicates that the absorbance of the biotin and pyridoxine increased with frequency. Molecular vibrational spectral calculations based on density functional theory (DFT) show strong correlation with the experiment. We investigated the absorption spectra of isolated molecules (single molecule, two molecules, three molecules) and unit cell of crystal to clarify the mechanism of the spectra change due to intramolecular and intermolecular vibration and rotation.

引用

页码：2946 / 2951

页数：6

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