Spin relaxation parameters in recombining radical ion pair (diphenylsulfide-d10)+/(p-Terphenyl-d14)− obtained by OD ESR and quantum beats techniques

Abstract

Abstraet. Parameters of paramagnetic relaxation were determined by OD ESR and quantum beats techniques for a recombining pair of radical ions (DPS-d10)+/(PTP-d14) -in n-hexane, isooctane, cisdecalin, and squalane solutions. The T 2 relaxation time determined by quantum beats technique is independent of solvent viscosity and magnetic field strength in the range 170-9600 G. These data are in agreement with the results obtained by OD ESR technique assuming fast T~ relaxation for radical cation. Neglecting the contribution of radical anion relaxation, we obtained T~c = T2c ~ 50 ns for (DPS-dl0) +.