Monitoring the reaction between AlCl3 and o-xylene by using terahertz spectroscopy

doi:10.1088/1674-1056/22/11/118701

Abstract Terahertz time-domain spectroscopy (THz-TDS) is used to study the interaction between AlCl₃ and o-xylene in a temperature range from 300 K to 368 K. For comparison, the three isomers of o-, m-, and p-xylene are measured by using THz-TDS. The o-xylene carries out isomerization reaction in the presence of catalyst AlCl₃. The absorption coefficient of the mixed reaction solution is extracted and analyzed in the frequency range from 0.2 THz to 1.4 THz. The temperature dependence of the absorption coefficient, which is influenced by both the dissolution of AlCl₃ and the production of the two other isomer resultants, is obtained, and it can indicate the process of the isomerization reaction. The results suggest that THz spectroscopy can be used to monitor the isomerization reaction and other reactions in chemical synthesis, petrochemical and biomedical fields.

Keywords: terahertz ultrafast spectroscopy absorption coefficient

Received: 25 July 2013
Revised: 16 August 2013
Accepted manuscript online:

PACS:	87.50.ux	(Therapeutic applications)
	78.47.jh	(Coherent nonlinear optical spectroscopy)
	78.20.Ci	(Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity))

Fund: Project supported by the National Basic Research Program of China (Grant No. 2013CB328706), the Specially Funded Program on National Key Scientific Instruments and Equipment Development, China (Grant No. 2012YQ14005), the Beijing National Science Foundation, China (Grant No. 4122064), and the Science Foundation of the China University of Petroleum (Beijing) (Grant Nos. QZDX-2010-01 and KYJJ2012-06-27).

Corresponding Authors: Zhao Kun
E-mail: zhk@cup.edu.cn

Cite this article:

Jin Wu-Jun (金武军), Li Tao (李涛), Zhao Kun (赵昆), Zhao Hui (赵卉) Monitoring the reaction between AlCl₃ and o-xylene by using terahertz spectroscopy 2013 Chin. Phys. B 22 118701

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Monitoring the reaction between AlCl3 and o-xylene by using terahertz spectroscopy

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Monitoring the reaction between AlCl₃ and o-xylene by using terahertz spectroscopy