关键词: C₆₀, 氨基多羧酸, 光电流

Abstract: Photolysis of aminopolycarboxylates with C₆₀ has been shown to be an effective method for the preparation of isomerically pure fullerene derivatives. A series of fullerroaminopolycar-boxylate derivatives have been prepared by this method. For example, glycine esters react with C₆₀ to give C₆₀(ROOCCHNHCHCOOR), the mechanism of which is proposed to involve complicated bond breaking and formation processes. Aminoacid esters with secondary and tertiary amino groups can add to C₆₀ by simply losing two H atoms. Irradiation of tetramethyl ethylenediaminetetraacetate(EDTA) with C₆₀ yields the EDTA containing fullerene monoadduct C₆₀(MeOOCCH)₂NCH₂CH₂N(CH₂COOMe)₂. Compared to well-known 1, 3-dipole addition method of fulleropyrrolidine preparation, the photoreaction reported here avoids the use of aldehydes or ketones and is specially suited for the preparation of the fullerene containing complexones such as the EDTA C₆₀ derivative. Langmuir-Blodgett film formation and the photoelectric properties of these fulleropyrrolidine compounds are investigated. Due to the presence of hydrophilic groups the derivatives form stable and transferable monolayer. By using metal ion sonlution as the subphase, metal complexes of the fullerocarboxylic derivatives are prepared at the air/water interface. Photoelctrical behavior of the LB film fabricated on ITO are studied under various conditions. For most of the compounds electrons flow from the electrolyte through the LB film to the ITO. The quantum yield of the fullerene derivatives can reach 8%.

Key words: C₆₀, aminopolycarboxylicacid, photo current