ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

IR Spectroscopic Study on Host-Guest Interaction of Montmorillonite with Benzothiazolium Compounds

V. Luptáková, I. Horváth, A. Perjéssy, and K. Putyera

Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, CS-842 15 Bratislava

Abstract: Montmorillonite is able to adsorb the benzothiazolium compounds (the chemicals with the properties of fungicides and the plant growth stimulators) from their aqueous solutions via a cation exchange mechanism. The interaction was explained evaluating the IR spectra alteration during the adsorption. There were no significant changes registered in the vibration bands of montmorillonite when benzothiazolium compounds were adsorbed. On the other hand, the remarkable positive shifts (to higher wavenumbers from 35 to 128 cm^-1) were observed in the stretching vibrations nu(C-H)_arom of the adsorbate molecules after their insertion in the montmorillonite interlayers. Moreover, the additional changes in the IR spectra of organic species (the shape, relative intensity, splitting, etc.) were recorded. The combined effects involving the steric and the inductive influence of the adsorbent are discussed.

Full paper in Portable Document Format: 463a157.pdf

Chemical Papers 46 (3) 157–161 (1992)