摘要:
Aminopolycarboxylic esters react with C-60 under photolysis to produce fullerene multicarboxylates. Irradiation of tetramethyl ethylenediaminetetraacetate (EDTA) with C-60 yields the EDTA-containing fullerene monoadduct C-60(MeOOCCH)(2)NCH2CH2N(CH2COOMe)(2). In addition, several other C-60 monoadducts are also isolated and characterized, including compounds due to EDTA fragmentation. Similar results are observed with pentamethyldimethylenetriaminepentaaceta (DTPA). When partially methylated nitrilotriacetic acid is irradiated with C-60, decarboxylation occurs and organo dihydrofullerene derivatives such as C-60(H)(CH2N(CH2COOMe)(2)) are formed. Radical mechanisms are proposed for both types of photoreactions. The fullerene derivatives are characterized by their spectroscopic data. Photoreactions of C-60 with other analogous molecules also support the conclusions.