The effect of the electron-donating groups on the electronic spectrum was investigated.

探讨了给电子基团对电子吸收光谱的影响。

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It was found that introducing electron donating groups, such as alkyls, weaken the electron accepting ability of C60 and make its first reduction wave shifted to more negative position.

结果发现，引入推电子基团，如烷基，会使C60得电子能力降低，第一个还原电位有较大的负移；

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The groups in ring of benzaldehydes, no matter they are electron withdrowing or electron donating except of hydroxy, do not seem to have much effect on the yield.

羟基处于醛基邻位和对位的苯甲醛与几种苯乙酮衍生物的缩合，多数没有得到预期的产物，或收率极低；苯乙酮环上的羟基对缩合反应影响很大，羟基越多，缩合越困难。

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