Spectroscopy and Spectral Analysis, Volume. 35, Issue 10, 2946(2015)
Terahertz Spectroscopy of Biotin and Pyridoxine
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.
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JIANG Ling, LI Miao, LI Chun, SUN Hai-jun, XU Li, LIU Yun-fei. Terahertz Spectroscopy of Biotin and Pyridoxine[J]. Spectroscopy and Spectral Analysis, 2015, 35(10): 2946
Received: Oct. 21, 2014
Accepted: --
Published Online: Feb. 2, 2016
The Author Email: Yun-fei LIU (lyf@njfu.edu.cnIntroduction)