INVESTIGATION OF RADICAL PAIRS IN MICELLES USING SPIN POLARIZATION TECHNIQUES

摘要

The examples given in this review demonstrate the applicability of SNP and SEMF CIDNP techniques to the study of chemical kinetics and spin dynamics of micellized radical pairs. In particular, these techniques allow us to evaluate electron exchange interaction, radical reencounters rate, electron spin relaxation rate, escape rate and microdiffusivity of radicals within the micelles. SNP and SEMF CIDNP techniques prove useful in those cases where the use of flash-photolysis is difficult due to the overlap of optical absorption bands. An additional advantage of both techniques is the spectral resolution of NMR, which allows one to follow the transformation of radicals into diamagnetic products. The highest efficiency in the applications of these methods can be obtained by combining them with the techniques of laser flash photolysis and Time-Resolved EPR.