Citation: 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. Application of Broadband Fourier Transform Microwave Spectroscopy in Study of Complexes and Chemical Reactions[J]. Chinese Journal of Analytical Chemistry, ;2019, 47(5): 779-784. doi: 10.19756/j.issn.0253-3820.181734 shu

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

DING Ming-Yi ^1, ,
LI Yu-Jie ¹ ,
XU Zi-Rui ¹ ,
JIAO Chao ¹ ,
DUAN Sheng-Wen ¹ ,
SUN Ming ¹ ,
LI Li ¹ ,
ZHANG Yu-Zhen ^1,2 ,
CHEN Qian ^1,2 ,
LI Ya-Min ³ ,
KANG Lu ⁴

1.
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China;
2.
Jiangsu Key Laboratory of Spectral Imaging & Intelligent Sense, Nanjing 210094, China;
3.
Department of Environmental and Chemical Engineering, Dalian Jiaotong University, Dalian 116028, China;
4.
Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, GA, USA 30144

Received Date: 23 November 2018
Revised Date: 20 February 2019

Fund Project: This work was supported by the National Natural Science Foundation of China (Nos. 61627802, U1531107)

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.
- Microwave spectrometer,
- Rotational spectroscopy,
- Chirped-pulse,
- Homodyne detection,
- van der Waals complex
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