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Chemisorption of Benzene on Cu-Montmorillonite as Characterized by FTIR and 13C MAS NMR

Published online by Cambridge University Press:  28 February 2024

Z. R. Hinedi ,
C. T. Johnston  and
C. Erickson
Z. R. Hinedi
Affiliation:
Department of Soil and Environmental Sciences, University of California-Riverside, Riverside, California 92521
C. T. Johnston
Affiliation:
Department of Soil and Water Science, University of Florida, Gainesville, Florida 32611
C. Erickson
Affiliation:
Department of Soil and Water Science, University of Florida, Gainesville, Florida 32611
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Abstract

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Sorption of benzene onto Cu-montmorillonite was characterized by Fourier transform infrared (FTIR) spectroscopy and 13C magic angle spinning nuclear magnetic resonance (MAS NMR). Under anhydrous conditions, chemisorption of benzene in the interlamellar region of Cu-montmorillonite led to the formation of a dark red surface complex that exhibited a vibrational spectrum similar to that of doped poly-p-phenylene. When the benzene sorption reaction was carried out under high relative humidity conditions, polymerization of benzene did not occur. The FTIR spectrum of the surface complex formed under wet conditions exhibited vibrational bands that could not be assigned to those of the parent benzene molecule or to those of previously observed chemisorbed Type I or Type II complexes. 13C MAS NMR spectra of 13C-enriched benzene sorbed onto Cu-montmorillonite powder showed the presence of two groups of peaks that could be assigned to aromatic and aliphatic carbon respectively.

Keywords

Benzene chemisorption13C MAS NMRCu-montmorilloniteFTIRPoly-p-phenylene
Type
Research Article
Information
Clays and Clay Minerals , Volume 41 , Issue 1 , February 1993 , pp. 87 - 94
Copyright
Copyright © 1993, The Clay Minerals Society

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