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  • Photooxidation of Diglycine in Confined Media.Application of the Microreactor Model for Spin-CorrelatedRadical Pairs in Reverse Micelles and Water-in-OilMicroemulsions
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  • Time-resolved electron paramagnetic resonance spectra (X-band) of correlated radical pairs created inAOT reverse micelles and microemulsions are presented, simulated, and discussed using the microreactormodel. The radicals are formed inside the water pool using photooxidation of diglycine by the excited tripletstates of two different anthraquinone sulfonate salts. Water pool size and temperature effects on thespectra are reported, and the simulations allow for extraction of the diffusion coefficient in the interior,which monotonically increases with water pool size. The data directly correlate with the diffusional propertiesof correlated radical pairs in regular aqueous micelle solutions studied previously by similar methods.Competition between H-atom abstraction and electron transfer is observed with anthraquinone sulfonate,but electron transfer is the only reaction pathway observed when anthraquinone disulfonate triplet stateis the sensitizing species.
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