黄翼虎1, 刘淑泉1, 栾浩杰1, 林其安1, 马吉祥2, 何桂华3
(1. 青岛科技大学 自动化与电子工程学院,山东 青岛 266042;
2. 山东泰开自动化有限公司,山东 泰安 271000;3. 济南出入境检验检疫局,山东 济南 250014)
摘要: 为了完善农药的太赫兹光谱数据库,在室温293 K和氮气环境下,利用太赫兹时域光谱技术对三氯杀螨砜和敌百虫进行了测试,得到了2种农药的太赫兹时域信号,进行傅里叶变换,采用Dorney等和Duvillaret等提出的模型计算出药品在03~23 THz频段内的折射率和吸收系数。结果表明三氯杀螨砜在THz处有7个吸收峰,敌百虫在THz处有3个吸收峰。两种农药的吸收峰位置和峰值明显不同。两种药品的平均折射率分别为 102和104。并应用Gaussian软件包以密度泛函理论对2种农药的振动频率进行了理论计算,理论计算结果在实验结果中得到较好地吻合。
关键词: 太赫兹; 农药; 吸收系数; 折射率
中图分类号: O 434.3 文献标志码: A
Terahertz Spectroscopic Investigation on Dipterex and Chlorodifon
HUANG Yihu1, LIU Shuquan1, LUAN Haojie1, LIN Qian1, MA Jixiang2, HE Guihua3
(1.College of Automation and Electronic Engineering, Qingdao University of Science and Technology,Qingdao 266042, China;
2.Shandong Taikai Automation Co.Ltd,Taian 271000,China;
3.Jinan EntryExit Inspection and Quarantine Bureau,Jinan 250014,China)
Abstract: In order to improve Terahertz spectrum database of pesticides, terahertz timedomain spectroscopy (THzTDS) was used to measure the Terahertz time domain signal of chlorodifon and dipterex under the room temperature and nitrogen conditions, and then calculated the refractive index and the absorption coefficient in the frequency range of 03—23 THz. The result showed that chlorodifon has 7 absorption peaks, dipterex has 3 absorption peaks. The peak positions and peak value of the two pesticides are obviously different. The average refractive index of the two pesticides is 102 and 104 respectively. At the same time, density functional theory (DFT) was applied to optimize the structures and calculate vibrational frequencies of the chlorodifon molecule and the dipterex molecule in the terahertz region with Gaussian software. The theoretical calculation results and experiment results received better agreement.
Key words: terahertz; pesticide; absorption coefficient; refractive index
收稿日期: 20140423
基金项目: 国家自然科学基金项目(61340038);山东省自然科学基金项目(2013ZRB01254);济南出入境检验检疫局项目(2012IK182);青岛产学研基金项目(12143(11)jch).
作者简介: 黄翼虎(1970—),男,副教授.
文章编号: 16726987(2015)03029106; DOI: 10.16351/j.16726987.2015.03.012