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Kroto等1985年发现C_(60)并提出C_(60)笼形结构模型,但对C_(60)进行大量深入的研究是在Kratschmer等人报道了制备克级C_(60)方法之后迅速开展的.由于C_(60)中每个碳原子所处的物理环境相同,因此在对C_(60)进行化学修饰的过程中,控制修饰基团的数目及其在C_(60)上的位置并不容易.尽管在C_(60)化学修饰方面已有不少工作,但目前只报道了很少几个纯的C_(60)衍生物,报道的产物绝大多数是混合物,如Krusic等利用光化学反应,合成了含有多个烷基的C_(60)衍生物:C_(60)(CH_3)_n(n=1—34)和C_(60)(CH_2C_6H_5)_n.(n=1—15);我们曾在低价稀土碘化物(SmI_2或
Kroto et al. Found C_ (60) in 1985 and proposed a C_ (60) cage structure model. However, extensive studies on C_ (60) were carried out immediately after Kratschmer et al. Reported the preparation of the Cg_ 60 method Since each carbon atom in C_ (60) is in the same physical environment, during the chemical modification of C_ (60), the number of modification groups and their positions on C_ (60) are not controlled Although there has been a lot of work on the chemical modification of C 60, only a few pure C 60 derivatives are reported at present, and the vast majority of the reported products are mixtures such as Krusic et al. (60) (CH_3) _n (n = 1-34) and C_ (60) (CH_2C_6H_5) _n. (N = 1-15), which have many alkyl groups. We In rare earth iodide (SmI_2 or