title: [Terahertz spectroscopic investigation of organophosphorus pesticide parathion-methyl].
abstract: The present paper reports the theoretical and experimental vibrational spectra of organophosphorus pesticide parathion-methyl in the frequency range from 0.2 to 2.0 THz respectively. Under the room temperature and nitrogen conditions, the absorption peaks were found at 0.65, 1.33, 1.81 and 1.91 THz, and the average refractive index was 1.39 based on the terahertz time-domain spectroscopy (THz-TDS). In parallel with the experimental study, density functional theory (DFT) was applied to obtain the structure and vibrational frequencies of parathion-methyl in the terahertz region. The calculated results are in reasonable agreement with the experimental data. The absorption features are caused by the collective vibrational and torsional modes, and the different absorption peaks correspond to different vibrational modes.
authors.affiliation: School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China. yan950526@163.com
authors.forename: Zhi-Gang
authors.initials: ZG
authors.lastname: Yan
authors.forename: Song
authors.initials: S
authors.lastname: Zheng
authors.forename: Qiang-Jun
authors.initials: QJ
authors.lastname: Xie
authors.forename: Ze-Kui
authors.initials: ZK
authors.lastname: Zhou