Diaryl Iodonium Photo Cleavage in Smectic Silicate Cell

Abstract

Diaryliodoium salt was intercalated into anionic and smectic silicate as the hybrid composites. Exposing with ultraviolet light, the silicates encapsulated cationic diaryliodonium were decomposed to form cation and radical intermediates. Photolytical cleave of iodonium salt in layered silicates cell via in situ detection of radical existence by Electron Paramagnetic Resonance is studied. The clay encapsulated iodonium under ultraviolet light exposure shows no signal of lone pair electron of radical species due to ion diffusion and cage effect. The cation diffusion coefficient and the effective ion radius were correlated with d spacing of intercalated clay. It is proposed the silicate's nucleophilic anion rich layers is a extinguish cage of radical products, and the cation to acid transition is favor in the layered silicates cell.