一种含苯并菲侧基的“毛-棒”状梯形聚倍半硅氧烷LB膜研究(英文)  

STUDY ON THE LB FILMS OF A HAIRY-ROD LADDER POLYSILSESQUIOXANE WITH TRIPHENYLENE SIDE GROUPS

作　　者：张晓静[1] 贾天刚[1] 韩志超[2] 谢萍[2] 张榕本[2] 

机构地区：[1]郑州轻工业学院材料与化学工程学院河南省表界面科学重点实验室,郑州450002 [2]中国科学院化学研究所高分子物理与化学国家重点实验室北京分子科学中心,北京100080

出　　处：《高分子学报》2009年第6期506-512,共7页Acta Polymerica Sinica

基　　金：supported by the National Natural Science Foundation of China(Nos.20174047,20204016,50273043,29974036,50073028);the Doctor Research Foundation of Zhengzhou University of Light Industry(No.000310)

摘　　要：一种新的含烷基取代的苯并菲侧基的"毛-棒"状(hairy-rod)梯形聚倍半硅氧烷(LPSQ)可以在空气-水界面形成稳定的单分子层,研究了温度、铺展溶剂和浓度对π-A等温曲线的影响.在适当的表面压下,以甲苯为铺展溶剂该单分子层可以被成功地转移至疏水的硅片或石英片上形成均一稳定的Y-型LB膜,其紫外吸收强度在几个月内均保持不变,说明该LB膜具有良好的稳定性,AFM图像表明其形成了均一致密的膜.通过偏振紫外光谱和荧光光谱研究了其面内各向异性,发现LPSQ的分子链采取了平行于拉膜方向的优先取向,最优取向因子S为0.42.A novel kind of ＂hairy-rod＂ ladder polysilsesquioxane （LPSQ） with alkyl substituted triphenylene side groups formed a stable monolayer on the air-water interface, and the effects of temperature, solvents and concentration of LPSQ solution on π-A isotherm curves were investigated. The monolayers of LPSQ can be successfully transferred onto hydrophobic surface of silicon wafer or quartz plate to develop a very stable and uniform Y-type Langmuir-Blodgett （LB） film when using toluene as the spreading solvent at proper surface pressure. High stability of LPSQ LB films is confirmed by the fact that the intensity of UV absorption does not decay within several months and AFM image shows uniform and compact films without noticeable defects. The in-plane anisotropy was monitored by the combination of polarized UV and fluorescence spectroscopy, revealing that the backbones of LPSQ adopted a preferential orientation parallel to the dipping direction with an optimum orientation parameter S of 0.42. Furthermore, the stable and uniform LB films of LPSQ with the triphenylene side groups promise to be a fine onedimensional molecular/nano-wire material.

关 键 词：梯形高分子 聚硅氧烷 苯并菲 LB膜 

分 类 号：O634.41[理学—高分子化学] TQ241.12[理学—化学]