Far-Infrared Vibrational Spectra of L-Ascorbic Acid Investigated by Terahertz Time Domain Spectroscopy

Author

Cao BingHua ; Zhang Guangxin ; Zhou Zekui

Author_Institution

Dept. of Control Sci. & Eng., Zhejiang Univ., Hangzhou

fYear

2008

Firstpage

47

Lastpage

49

Abstract

The low frequency vibrational modes, index of refraction, and absorption of L-ascorbic acid from 0.2 to 2.4 THz have been studied by terahertz time domain spectroscopy at room temperature. It is found that there are four dominated vibrational modes at 1.80, 2.05, 2.21 and 2.34 THz and the refractive index, varying between 1.77 and 1.83, has a mean value 1.79 in the 0.2-2.4 THz range. In parallel with the experimental study, density functional theory is employed to simulate structure and vibrational frequencies of L-ascorbic acid. Based on the calculated results, the observed vibrational modes in the far infrared region are assigned.

Keywords

density functional theory; infrared spectra; organic compounds; refractive index; L-ascorbic acid; density functional theory; far-infrared vibrational spectra; refractive index; terahertz time domain spectroscopy; Absorption; Density functional theory; Frequency; Humans; Laser excitation; Optical pulses; Polarization; Probes; Pump lasers; Spectroscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering, 2008. ICBBE 2008. The 2nd International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1747-6

Electronic_ISBN

978-1-4244-1748-3

Type

conf

DOI

10.1109/ICBBE.2008.18

Filename

4534898