中文摘要：

设计合成了3种新颖的螺二芴键联富勒烯（C60/C70）吡咯烷衍生物,其结构通过IR,^1H NMR,^13C NMR和MALDI-TOF进行确证,其电化学性质用循环伏安法进行研究.结果表明,C70衍生物6的还原电位较C60衍生物7分别向负电势移动0.1,0.12和0.01V.同时,使用纳秒和飞秒激光分别研究了化合物6,7和8的光限幅性能,其光限幅阈值分别为15.3,23.3和13.7J/cm^2,表明这些材料具有优异的光限幅性能.

英文摘要：

Three novel fullerene（C60/C70） derivatives containing spirobifluorene,named 2-（9,9′-spirobi[fluorene]-2-yl）-1-methylfullero[C70]pyrrolidine（6）,2-（9,9′-spirobi[fluorene]-2-yl）-1-methylfullero[C60]pyrrolidine（7） and 2′-（1-methyl-fullero[C60]pyrrolidin-2-yl）-9,9′-spirobi[fluorene]-2-carbaldehyde（8）,respectively,were synthesized and their structures were confirmed by IR,^1H NMR,^13C NMR,MALDI-TOF.Their electrochemical properties were studied by cyclic voltammetry.The results show that reduction peaks of C70 derivative 6 shift to more negative than that of C60 derivative 7 about 0.1,0.12 and 0.01 V,respectively.Their optical limiting properties were investigated by nanosecond and femtosecond laser system.Comparative study on their optical limiting properties indicated that they showed different optical-limiting mechanisms for nanosecond and femtosecond laser.The optical limiting thresholds of 13.7,15.3 and 23.3 J/cm^2 in nanosecond timescale were determined for compounds 6—8.The results show that they are effective optical limiters for laser protection.