1－苄基－9－氢富勒烯－60LB多层膜的制备及其光学非线性性质

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（ｂｕｌｋｐｈａｓｅ）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）＝２．１×１０－１１ｅｓｕ。

Fabrication and Optical Nonlinearities of Langmuir-Blodgett Multilayers of 1-Benzyl-9-Hydrofullerence-60

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.