FORMATION OF RADICAL ADDUCTS OF C-60 WITH ALKYL AND HALO-ALKYL RADICALS - TRANSIENT ABSORPTION AND EMISSION CHARACTERISTICS OF THE ADDUCTS

C-60 is known to undergo addition reactions with several radicals. Las er flash photolysis and pulse radiolysis studies have been carried out on C-60 solutions containing various halocarbons. Transient absorptio n peaks observed in pulse radiolysis experiments at 460 and 640 nm are attributed to different radical adducts between C-60 and halocarbon r adicals. No evidence is obtained for the radical cation C-60(.+). On a longer timescale (ca. 30 mu s), a unique strong emission is observed with a maximum at 745 nm which is attributed to the excited state of C -60 radical adducts generated owing to absorption of the strong probe light. Rate constants for the formation and decay of the radical adduc ts have been estimated and compared with some reported values.