The optical properties of dinitrobenzoic acid isomers in the terahertz and infrared regions
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Department of Physics, Capital Normal University,Department of Physics, Capital Normal University,Department of Physics, Capital Normal University

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the National Instrumentation Program, the National Natural Science Foundation of China and the Nature Science Foundation of Beijing

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    Abstract:

    The absorption spectra of four dinitrobenzoic acid isomers were acquired over the range of 0.3~2.2 THz using a terahertz time-domain spectroscopy (THz-TDS) system and over the range of 1 400~1 800 cm-1 using a Fourier transform infrared spectrometer (FTIR). These isomers generate very similar IR spectra but there are substantial differences in the THz region. Vibrational spectra were simulated using density functional theory and the results of these calculations explain the differences and similarities in both the THz and FTIR spectra. THz-TDS technique appears to be a powerful means of identifying isomers in the pharmaceutical and chemical industries.

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ZHANG Jian-Na, ZHANG Bo, SHEN Jing-Ling. The optical properties of dinitrobenzoic acid isomers in the terahertz and infrared regions[J]. Journal of Infrared and Millimeter Waves,2017,36(5):538~542

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History
  • Received:December 27,2016
  • Revised:April 13,2017
  • Adopted:April 20,2017
  • Online: November 29,2017
  • Published: