Energy- and electron-transfer from porphyrins in the triplet excited state to C-60 in toluene and benzonitrile has been studied with Fourier transform EPR (FT-EPR). Pulsed-laser excitation of the systems magnesium tetraphenylporphyrin (MgTPP)/C-60 and free-base octaethylporphyrin (OEP)/C-60 in toluene gives rise to a resonance peak from C-60 triplets (C-3(60)) generated primarily by the energy-transfer process (MgTPP)-Mg-3 ((OEP)-O-3) + C-60 --> MgTPP (OEP) + C-3(60) as evident from the emissive spin polarization of the C-3(60) Signal observed at. early times. No FT-EPR signals from redox products could be detected. In benzonitrile, triplet energy transfer from (MgTPP)-Mg-3 or (OEP)-O-3 to C-60 is a minor process. In this polar solvent photoexcitation of MgTPP/C-60 produces FT-EPR spectra with signal contributions from MgTPP+ and C-60(-) in addition to the C-3(60) resonance. From the spin polarization and time profile of the signal from the anion radical, it can be deduced that the primary route of electron transfer is oxidative quenching of the porphyrin triplets, 3MgTPP ((OEP)-O-3) + C-60 --> MgTPP+ (OEP+) + C60- The reduction in 3C60 lifetime indicates that C60- is generated as well by the reductive triplet quenching reaction C-3(60) + MgTPP (OEP) --> C-60(-) + MgTPP+ (OEP+).