[60]富勒烯与1, 1'-联茚的Diels-Alder加成物的合成与结构表征

通过Diels-Alder环加成反应，发现可控制反应条件，使1,1'-联茚与C60反应，并高产率地得到具有新颖结构的单加成物。用HPLC，FT-IR,FD-MS及^1HNMR,^13CNMR,HMQC,HMBC等多种波谱技术对其结构进行表征，测得它的两个sp^3杂化的桥头碳的化学位移为σC:70.91，证明生成的衍生物为6,6]闭式环加成。^13CNMR谱共给出38个信号，表明C601,1'-联茚衍生物分子具有Cs对称性；此外，还发现单加成衍生物C601,1'-联茚热稳定性好，在四氢呋喃、丙酮等极性溶剂中溶解性好，很适合于在LB膜及光限幅性能方面的研究。

Synthesis and characterization of the monoadduct C60(C9H7-C9H7) formed in Diels-Alder cycloaddition of C60 with 1, 1'-biindene

Diels-Alder cycloaddition of C60 with 1, 1'-biindene under controlled conditions affords a stable monoadduct C60(C9H7-C9H7) of novel structure, which was confirmed by HPLC, FT-IR, FD-MS, ^1H NMR, ^13C NMR, HMQC and HMBC spectra. Its two bridgehead cage carbons resonate at 70.91. The ^13C NMR spectra show 38 lines consistent with the Cs symmetry associated with 6, 6] addition. In addition, the high solubility of this adduct in polar solvents such as THF, acetone makes it suitable to a good application in the investigation of LB film and optical limiting properties.