Structural Model Calculation for Antimicrobial Agent Derived from Montmorillonite Intercalated by Ag^+-chelate of Imidazole(Synthesis of Clays,Proceedings of the 13^<th> International Clay Conference)

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Ag^+ -imidazole chelate supported montmorillonite has been synthesized by a conventional cation exchange reaction in an aqueous medium at ambient temperature. The results of X-ray diffraction and elemental analysis indicated that the most part of the interlayer exchangeable cations were replaced by the silver chelates. The resulting material was subjected to an antimicrobial activity examination, and its interlayer structure was determined. Minimum inhibitory concentration tests using the microbes indicated that the synthesized agent had significant antibacterial and antifungal characteristics against two kinds of bacteria and six kinds of fungi. The imidazole ligands in the montmorillonite interlayers were decomposed and became carbon by heating temperature of around 300℃ in an air atmosphere. The structure of the intercalated specimen was estimated by the (00l) relative intensities which were observed by X-ray diffraction. Based on the change in the basal spacing after the reaction, and the structural model calculation of the composite, it was concluded that the planar silver chelates were monolayer with flat orientation in the silicate layers.