Pulse radiolysis technique has been employed to generate and investigate electron and energy transfer reactions involving acridine(1,8)dione dyes in hydrocarbons. The transient absorption spectra obtained on pulse radiolysis of N 2 -saturated solution in 1,2-dichloroethane are assigned to solute radical cation. The radical cations undergo charge transfer reaction with tetramethyl-p-phenylenediamine and triethyl amine. The transient absorption spectra in N 2 -saturated solution in benzene are assigned to triplet-triplet absorption. It was observed that biphenyl, p-terphenyl and benzophenone triplets undergo energy transfer to methyl and phenyl substituted acridine(1,8)dione dyes generating the triplets of the acceptor. With H substituted acridine(1,8)dione dye, benzophenone and chloranil triplets favor electron-transfer followed by H + transfer reaction forming benzophenone ketyl and chloranil semiquinone radicals respectively.