An investigation of the conformational behavior of a chlorinated hydrocarbon, 1,1,2-trichloroethane, adsorbed in zeolites by Raman spectroscopy

Journal article


Publication Details

Author(s): Wang H, Schwieger W, Huang Y
Journal: Canadian Journal of Chemistry-Revue Canadienne De Chimie
Publisher: NRC Research Press (Canadian Science Publishing)
Publication year: 2015
Volume: 93
Pages range: 118-125
ISSN: 0008-4042


Abstract


The conformational behavior of 1,1,2-trichloroethane (TCE) adsorbed in two representative zeolites (silicalite-1 and zeolite L) was investigated by Fourier transform (FT)-Raman spectroscopy in combination with thermogravimetric analysis (TGA) and powder X-ray diffraction (XRD). The results indicate that the conformational properties of the TCE molecules inside a zeolitic host are strongly influenced by both the framework topology and the existence of charge balancing cations. When TCE is adsorbed inside completely siliceous silicalite-1, the population of the trans conformer increases significantly relative to pure liquid. Adsorption of TCE also induces a phase transition from the monoclinic to orthorhombic crystal system in the framework of silicalite-1 at high loading levels. At low loading, the TCE molecules are adsorbed inside the channels of silicalite-1. When at high loading levels, TCE molecules reside at both the channel intersection as well as the midsection of the channels. For zeolite L, the presence of an extra-framework cation shows a strong influence on TCE conformation. The strong interaction of the cation with the large dipole moment of the gauche isomer leads to a large increase in the gauche population. Raman data provide direct evidence that the cations in the framework interact much more strongly with the gauche isomer than the trans isomer.



FAU Authors / FAU Editors

Schwieger, Wilhelm Prof. Dr.
Professur für Technische Chemie (Reaktionstechnik)


External institutions
Western University


How to cite

APA:
Wang, H., Schwieger, W., & Huang, Y. (2015). An investigation of the conformational behavior of a chlorinated hydrocarbon, 1,1,2-trichloroethane, adsorbed in zeolites by Raman spectroscopy. Canadian Journal of Chemistry-Revue Canadienne De Chimie, 93, 118-125. https://dx.doi.org/10.1139/cjc-2014-0187

MLA:
Wang, Haiyan, Wilhelm Schwieger, and Yining Huang. "An investigation of the conformational behavior of a chlorinated hydrocarbon, 1,1,2-trichloroethane, adsorbed in zeolites by Raman spectroscopy." Canadian Journal of Chemistry-Revue Canadienne De Chimie 93 (2015): 118-125.

BibTeX: 

Last updated on 2018-17-07 at 21:23