Terahertz absorption spectra of benzene-1,2-diol, benzene-1,3-diol and benzene-1,4-diol

Science & Technology Physics 02 engineering and technology Atomic Molecular & Chemical 01 natural sciences 0104 chemical sciences DENSITY-FUNCTIONAL THEORY Chemistry TIME-DOMAIN SPECTROSCOPY POLYMORPHS CASTEP Physical Sciences Physical VIBRATIONAL-SPECTRA 0210 nano-technology
DOI: 10.1016/j.cplett.2011.12.062 Publication Date: 2011-12-29T17:38:44Z
ABSTRACT
The terahertz spectra (8-128 cm(-1)) of three structural isomers have been measured using terahertz time-domain spectroscopy at room temperature. Substantial differences among these THz spectra have been found and implied that THz-TDS is an excellent tool to identify isomers. Numerical calculation based on solid-state density functional theory has been carried out and assigned the observed THz features theoretically. Good agreement between the calculated and experimentally measured spectra for benzene-1,2-diol and benzene-1,3-diol has been achieved. According to the calculated results, it is found that the measured THz spectra of these two isomers mainly originate from intermolecular vibrations. (C) 2011 Elsevier B.V. All rights reserved.
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