三苯基咪唑富勒烯吡咯烷衍生物的合成及其紫外、荧光和光限幅性质的研究

通过1,3-偶极环加成合成了四种三苯基咪唑富勒烯吡咯烷衍生物3a～3d,用FT-IR,NMR,MS和元素分析进行其结构测定和表征;用循环伏安法测定了其电化学性质,结果表明,与参比化合物C60相比还原电位发生负移,更容易形成电子受体;用纳秒和飞秒激光研究了四种化合物的光限幅性质,结果表明化合物3a和3c的纳秒光限幅性质明显,而3b则观察不到光限幅现象,说明化合物中硝基的引入不利于光限幅效应.

Synthesis, Ultraviolet, Fluorescence and Optical Limiting Properties of Triphenyl Imidazole Fulleropyrrolidine Derivatives

Four triphenyl imidazole fullerene derivatives 3a～3d have been synthesized by 1,3-dipolar cycloaddition. All the compounds were determined and characterized by FT-IR, NMR, MS and elemental analysis. The electrochemical property has been studied by cyclic voltammetry, the result shows that the reduction potentials shift to more negative values compared with C60. The optical limiting properties have been studied using nanosecond and femtosecond timescale. The results show that 3a and 3c indicate significant optical limiting properties, especially in nanosecond timescale, while the phenomenon of 3b can not been observed owing to the introduction of the nitro groups, which reduce the optical activities and are not in favor of optical limiting.