RADICAL-PAIR DYNAMICS IN THE PHOTOREDUCTION OF ANTHRAQUINONE IN SODIUM DODECYL-SULFATE MICELLAR SOLUTION DETECTED BY PULSE-MODE PRODUCT-YIELD-DETECTED ELECTRON-SPIN-RESONANCE - TEMPERATURE AND SALT DEPENDENCE

The dynamical behavior of the radical pair (RP) produced in the photor eduction of anthraquinone in sodium dodecyl sulfate (SDS) micellar sol utions has been observed at various temperatures and salt concentratio ns by using the pulse-mode product-yield-detected ESR (PYESR) techniqu e. Through the numerical calculation of the time-domain PYESR response by the Runge-Kutta method applied to a reaction scheme, dynamical par ameters such as the escape rate of the RP (k(ESC)) and the rate of spi n trapping directly from the RP (k(ST)) have been obtained. Since thes e kinetic parameters are very informative for elucidating the micelle dynamics, we may call this method the ''spin-pair-probe'' technique.