PHOTOCHEMISTRY OF COBALT(III) COMPLEXES IN AEROSOL-OT WATER HEPTANE MICROEMULSION SYSTEM

A photochemical reaction conducted in reverse miceller media is influe nced by the environment which result in control and/or modification of reactivity. The ability of the reverse micelle to solubilise a large amount of water is a distinguishing feature. The salient features of t hese micelles, where aggregation occurs in an inverted manner that inf luences the photochemical reactivity, are microviscosity effects, loca lisation and cage effects. Three cobalt(III) complexes have been studi ed at a fixed pH at two different wavelengths 254 and 313 nm in differ ent pool-size. The photoredox quantum yield PHI(Co2+) at both the wave lengths decreases with the decrease of wavelength of the photolysis ra diation in all the three pool-sizes studied, in the same manner as obs erved in pure aqueous media.