Ferric Perchlorate-Mediated Synthesis of 1,2-Fullerenols C60(OCOR)(OH)
摘要:
1,2-Fullerenols C-60(OCOR)(OH) have been facilely synthesized via the one-step reaction of [60]fullerene with acid chlorides promoted by ferric perchlorate. A possible reaction mechanism for the product formation is proposed.
C-60 reacted with aromatic and aliphatic carboxylic acids in the presence of inexpensive FeCl3 at room temperature to produce hydroxyfullerenyl esters C-60(OCOR)(OH) in up to 68% isolated yield. The hydroxyl group was utilized in functional group transformations to obtain a diester derivative C-60(OCOAr)(OCOPh) (Ar = 2,6-xylyl) and a siloxyl derivative C-60(OCOAr)(OSiMe3). The diester and siloxyl derivatives were found to possess low-lying LUMO levels were utilized in organic photovoltaic devices showing 1.3% power conversion efficiency.