宽带傅里叶变换微波光谱技术在络合物与化学反应研究中的应用  

Application of Broadband Fourier Transform Microwave Spectroscopy in Study of Complexes and Chemical Reactions

作　　者：丁明屹 李瑜杰 徐子锐 焦超 段圣文 孙铭[1] 李力[1] 张玉珍[1,2] 陈钱 李亚民[3] 康路 DING Ming-Yi;LI Yu-Jie;XU Zi-Rui;JIAO Chao;DUAN Sheng-Wen;SUN Ming;LI Li;ZHANG Yu-Zhen;CHEN Qian;LI Ya-Min;KANG Lu(School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing 210094, China;Department of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China;Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA, USA 30144)

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094 [2]江苏省光谱成像与智能感知重点实验室,南京210094 [3]大连交通大学环境与化工学院,大连116028 [4]Department of Chemistry and Biochemistry,Kennesaw State University

出　　处：《分析化学》2019年第5期779-784,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金项目(Nos.61627802;U1531107);南京理工大学本科生科研训练'百千万'计划项目(No.201710288035);中央高校基本科研业务费专项资金(No.3091801410401);江苏省光谱成像与智能感知重点实验室2018年开放基金资助~~

摘　　要：基于啁啾脉冲线性调频技术的宽带微波光谱仪在测量分子转动跃迁谱线的效率上较传统的窄带光谱仪优势明显,已成为众多分子转动光谱实验室必备的实验仪器。本研究设计搭建了频率覆盖1～18 GHz的宽带傅里叶变换微波光谱仪,采用零差式检测方案并结合多脉冲自由感应衰减技术,单次扫描带宽约2 GHz。以稀释在氩气中0.5%的OCS分子为标准样品,宽带微波光谱仪同时成功检测出6种同位素异数体的分子转动跃迁信号。在此基础上,测量了Ar-OCS二元范德华络合物的分子转动光谱,并对叔丁醇与HCl的反应进行了实时监测。Broadband microwave spectrometers based on the chirped pulse, a linear frequency modulation technology, have become indispensable experimental instruments for many rotational spectroscopy laboratories, with significant efficiency advantage in measuring molecular rotational transitions compared with traditional narrow-band spectrometers. In this work, a broadband chirped-pulse Fourier transform microwave spectrometer with frequency coverage of 1-18 GHz was designed and constructed with a single scan bandwidth about 2 GHz . The homodyne detection scheme was adopted along with the multiple FID technique applied. Using OCS molecules diluted to 0.5% in argon gas as the standard sample, rotational transitions of 6 OCS isotopologues were successfully detected by the present broadband microwave spectrometer. On this basis, the rotational spectrum of Ar-OCS van der Waals dimer was measured, and the reaction of tertiary-butyl alcohol with HCl was monitored in real time as well.

关 键 词：微波光谱仪 转动光谱 啁啾脉冲 零差式检测 范德华络合物 

分 类 号：O657.3[理学—分析化学]