C 60 and C 70 adducts containing spacer-linked phenyl (BK1), are given. Electrochemical and optoelectrochemical studies were undertaken by using cyclic voltammetry and 9-anthracenyl (BK2), 4-(9-anthracenyl)phenyl (BK3), and 1pyrenyl groups (BE1 and FE1) have been studied. Two spectroelectrochemical methods. The fluorescence emission spectra of BK2, BK3, BE1, and FE1 are reported. different synthetic pathways were employed based on the [4+2] cycloaddition of fullerenes with 2-trimethylsiloxy-1,3-Intramolecular energy transfer from the excited fluorophore to the fullerene subunit is shown to occur. butadienes (TB). Spectroscopic data for the new compounds
[ * ] The following abbreviations are used for derivatives of C 60 : cyclohexanones, BK; esters, BE; trimethylsiloxy derivatives, BC; steric congestion in the transition state caused by the covalcyclohexanol derivative, BA; for derivatives of C 70 : cyclohexaently attached aryl groups slows down the rate of cycloadnone derivative, FK; ester derivative, FE; cyclohexanol derivative, FA; for 1,3-butadienes: TB. dition and lowers the yields.