INCORPORATION OF THIOACETAMIDE INTO THE INTERLAYER SPACE OF MONTMORILLONITE BY SOLID-SOLID REACTIONS

Abstract

Thioacetamide molecules were intercalated into the interlayer space of Cd(II)-montmorillonite by solid-solid reactions at room temperature. The reactions were confirmed by powder X-ray diffraction, infrared spectroscopy, CHN analysis, and thermal analysis of the products. The basal spacings of the products with the molar ratios of thioacetamide to interlayer Cd(II) cation of 3:1 and 6:1 were ca. 1.5 and 1.8 nm, respectively. The basal spacings decreased gradually to ca. 1.3 nm when the products were stored in air at room temperature for long periods (i.e. several months). The intensities of the IR bands due to thioacetamide and the organic contents of the products were reduced correspondingly, suggesting that thioacetamide molecules were partly decomposed to give CdS and the decomposition accompanied the deintercalation and sublimation of thioacetamide from the interlayer space.