利用π-Ａ等温线、小角Ｘ射线衍射(SAXD)和光学测量方法研究了一种取代富勒烯(C60-Be)LB膜的结构特性。纯C60-Be分子以体相(bulk phase)的形式存在于气-液界面上。氮冠(醚)(NC)分子作为隔层材料，与C60-Be分子相混合可以制备性能优良的LB膜。π-A、吸收和小角X光衍射测量表明：这种混合膜结构的改善是由于C60-Be分子镶嵌在NC分子的双脂链之间造成的。通过测量三次谐波产生(THG)可以推出C60-Be的三阶非线性系数χ(3)＝2.1×10-11 esu。

The structural features of the LB films of substituted fullerence C60-Be were investigated by π-A isotherm, small angle X-ray diffraction (SAXD) and optical measurements. We found that pure C60-Be molecules existed at the air-water interface in a bulk phase. NC was used as an inert material to construct mixed C60-Be/NC LB films which had a much better qulity than the pure C60-Be LB films. Our π-A, UV-visible absorption and SAXD measurements showed that the structural improvement in the mixed C60-Be/NC LB films was realized by insertion of the C60-Be molecules between the two hydrophobic chains of the NC molecules. The relatively large third-order nonlinear susceptivility χ(3)＝2.1×10-11 esu was deduced by measuring THG from mixed C60-Be/NC LB films. The NC molecules have attractive features as an inert material in fabrication of LB multilayers made from optically nonlinear materials with hydrophobic long tails or ball-like structures.