SYNTHESIS AND PROPERTIES OF NEW 60JFULLERENE DERIVATIVES WITH DIFFERENT ELECTRON DONOR FRAGMENTS

摘要

Several new pyrazolino[60]fullerenes have been prepared in one pot from hydrazones. All of the pyrazolino[60]fullerenes synthesized possess similar or better electron affinity than the parent C_(60). Consequently, the use of pyrazolino[60]fullerenes as acceptors for novel donor-acceptor arrays clearly has advantages over other fullerene derivatives. Moreover, the possibility of introducing two electroactive groups in the system opens the possibility of preparing donor-C_(60)-acceptor or donor-C_(60)-donor triads by an easy synthetic procedure, which represents an improvement over isoxazolino[60]fullerenes. Finally, two novel fullerene-ferrocene dendrimers have been synthesized and characterized and their electrochemistry has been studied. Absorption spectra show weak interaction in the ground state between the ferrocene units and C_(60).