摘要
光照条件下Ｃ６０能与一系列氨基多羧酸反应生成单加成衍生物。利用这一方法合成了一系列Ｃ６０氨基多羧酸衍生物。如甘氨酸脂与Ｃ６０光照下反应生成Ｃ６０（ＲＯＯＣＣＨＮＨＣＨＣＯＯＲ），该反应机理比较复杂，其他的亚氨基及次氨基羧酸脂的反应机理相对较简单。ＥＤＴＡ甲脂与Ｃ６０光照下反应生成Ｃ６０［（ＭｅＯＯＣＣＨ）２ＮＣＨ２ＣＨ２Ｎ（ＣＨ２ＣＯＯＭｅ）２］，净的结果就是ＥＤＴＡ失去２个Ｈ原子。这些含强亲水基团的Ｃ６０多羧基衍生物都有很好的成膜性能，能够生成稳定且易转移的单分子膜。通过使用金属离子溶液作为亚相，可在空气／水界面制备相应金属离子的Ｃ６０衍生物配合物膜。ＬＢ膜的光电测定结果表明大部分Ｃ６０衍生物均具有阴极光电流，即电子从电解质流经ＬＢ膜再流向电极，最高光电转换量子产率为８％左右。
Photolysis of aminopolycarboxylates with C 60 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 C 60 to give C 60 (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 C 60 by simply losing two H atoms.Irradiation of tetramethyl ethylenediaminetetraacetate(EDTA) with C 60 yields the EDTA containing fullerene monoadduct C 60 (MeOOCCH) 2NCH 2CH 2N(CH 2COOMe) 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 C 60 derivative.Langmuir Blodgett film formation and the photoelectric properties of these fulleropyrrolidine ccompounds 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%.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1998年第2期296-301,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金
国家科委攀登计划
