Hn. Ghosh et al., CHARGE SEPARATION, CHARGE RECOMBINATION AND ELECTRON-TRANSFER REACTIONS IN SOLUTIONS OF FULLERENE-C-60 AND PHENOTHIAZINES, Chemical physics letters, 265(3-5), 1997, pp. 365-373
C-60 forms weak charge transfer complexes with phenothiazine and methy
l phenothiazine. Charge separation, charge recombination and ion disso
ciation reactions were investigated in the solution phase following ex
citation of the charge transfer band of the complexes with picosecond
laser pulses. The formation of the triplet state of C-60 on charge rec
ombination, and electron transfer reactions of the singlet and triplet
states of C-60 with phenothiazine to give C-60(-.) and cation radical
s have been investigated. On longer timescales (> 1 mu s) back electro
n transfer between C-60(-.) and cation radical takes place. The effect
of solvent polarity was studied on the charge recombination and back
electron transfer reactions.