SPIN RELAXATION PARAMETERS IN RECOMBINING RADICAL-ION PAIR (DIPHENYLSULFIDE-D(10))(+) (P-TERPHENYL-D(14))(-) OBTAINED BY OD-ESR AND QUANTUMBEATS TECHNIQUES/

Parameters of paramagnetic relaxation were determined by OD ESR and qu antum bears techniques for a recombining pair of radical ions (DPS-d(1 0))(+)/(PTP-d(14))(-) in n-hexane, isooctane, cis-decalin, and squalan e solutions. The T-2 relaxation time determined by quantum beats techn ique is independent of solvent viscosity and magnetic field strength i n the range 170-9600 G. These data are in agreement with the results o btained by OD ESR technique assuming fast T-1 relaxation for radical c ation. Neglecting the contribution of radical anion relaxation, we obt ained T-1c=T(2c)congruent to 50 ns for (DPS-d(10))(+).