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Identification of Explosives 2,4‐DNT and 2,6‐DNT Using Terahertz Time‐domain Spectroscopy
Author(s) -
LIU GuiFeng,
MA XiaoJing,
MA ShiHua,
ZHAO HongWei,
MA MingWang,
GE Min,
WANG WenFeng
Publication year - 2008
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200890228
Subject(s) - chemistry , terahertz radiation , terahertz time domain spectroscopy , intermolecular force , spectroscopy , terahertz spectroscopy and technology , absorption (acoustics) , analytical chemistry (journal) , absorption spectroscopy , time domain , refractive index , molecule , optoelectronics , optics , chromatography , organic chemistry , materials science , physics , quantum mechanics , computer science , computer vision
The absorption spectra and refractive index of 2,4‐dinitrotoluene (2,4‐DNT) and 2,6‐dinitrotoluene (2,6‐DNT) were measured in the region of 0.3–2.0 THz by terahertz time‐domain spectroscopy (THz‐TDS) at room temperature. Gaussian 03 program was applied to predict geometric structure and vibrational frequencies of 2,6‐DNT. Three absorption peaks at 1.09, 1.36 and 1.55 THz of 2,6‐DNT were obtained and assigned to intermolecular interactions. Quantitative analysis with THz‐TDS was undertaken for the mixture of 2,4‐DNT and 2,6‐DNT. The analytic weight ratio of 2,4‐DNT to 2,6‐DNT is consistent with the actual one with an analytic error of about 8%.