Acta Phys. -Chim. Sin. ›› 2011, Vol. 27 ›› Issue (12): 2743-2748.doi: 10.3866/PKU.WHXB20112743


Terahertz Time-Domain Spectroscopy of L- and DL-Fudosteine

ZHAO Rong-Jiao, HE Jin-Long, LI Jing, GUO Chang-Sheng, DU Yong, HONG Zhi   

  1. Centre for Terahertz Research, China Jiliang University, Hangzhou 310018, P. R. China
  • Received:2011-07-26 Revised:2011-09-19 Published:2011-11-25
  • Contact: LI Jing
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (61001064) and Natural Science Foundation of Zhejiang Province, China (Y1090912).

Abstract: The absorption spectra of L- and DL-Fudosteine were measured using terahertz time-domain (THz-TDS) system at room temperature. Experimental results show that L- and DL-Fudosteine both have distinct fingerprint spectra in the THz region and their characteristics are different from each other. The absorption frequencies for the vibration and rotation of Fudosteine in the THz spectral range were simulated and the results are consistent with the experimental results. We also interpret the origin of the absorption peaks using a simulation. Finally, the absorption spectra of the Fudosteine capsule, pure L-Fudosteine and DL- Fudosteine are compared. The results verify that the main component of the capsule is L-Fudosteine. This study provides a reference for the analysis of the main ingredients of compounds.

Key words: L-, DL-Fudosteine, Terahertz spectrum, Density functional theory, Vibration mode