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Proceedings Paper

Study on spectral properties of difenoconazole by terahertz time-domain spectroscopy
Author(s): Qian Zhou; Ying Liu; Kuan Kou; Guozhong Zhao
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Paper Abstract

The terahertz (THz) and infrared spectra of solid pesticide difenoconazole are studied. The absorption spectra of difenoconazole are obtained at room temperature in the frequency range of 0.2 THz – 2.6 THz by using of terahertz time-domain spectroscopy (THz-TDS) and in the frequency range of 1.8 THz – 10 THz by the Fourier Transform Infrared Spectroscopy (FTIR). The experimental results show five significant absorption peaks in THz frequency range, respectively, 0.66 T, 0.80 T, 1.03 T, 1.31 T and 1.57 T, and those peaks corresponding to the abnormal dispersion. The spectral characteristics between 0.2 THz and 15 THz of difenoconazole are simulated by using of Gaussian03 software based on the single molecular model and the density functional theory (DFT). Both of simulation and experimental results fit well in the terahertz range. Moreover, the quantitative analysis of difenoconazole is studied based on the THz-TDS measurement. The absorption coefficient and refractive index spectra of difenoconazoles at different proportions doped with polyethylene (PE) are obtained. The partial least squares (PLS) model is built. It is possible to predict the concentration of difenoconazole in the mixtures by this method.

Paper Details

Date Published: 12 August 2015
PDF: 7 pages
Proc. SPIE 9625, 2015 International Conference on Optical Instruments and Technology: Terahertz Technologies and Applications, 962504 (12 August 2015); doi: 10.1117/12.2193269
Show Author Affiliations
Qian Zhou, Capital Normal Univ. (China)
Anhui Agricultural Univ. (China)
Ying Liu, Capital Normal Univ. (China)
Kuan Kou, Capital Normal Univ. (China)
Guozhong Zhao, Capital Normal Univ. (China)

Published in SPIE Proceedings Vol. 9625:
2015 International Conference on Optical Instruments and Technology: Terahertz Technologies and Applications
Cunlin Zhang; Xi-Cheng Zhang, Editor(s)

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