红外光谱研究聚硅氧烷侧链手性液晶及其单体的单层LB膜  

FTIR Spectroscopy of Monolayer LB Films of a Kind of Side-Chain Chiral Liquid Crystalline

作　　者：王旭[1] 赵冰[1] 孙丽[1] 薛庆斌[2] 杨孔章[2] 张其震[3] 

机构地区：[1]超分子结构与材料教育部重点实验室,吉林大学长春130012 [2]胶体与界面教育部重点实验室,山东大学济南250100 [3]山东大学化学系,山东大学济南250100

出　　处：《光散射学报》2005年第2期137-141,共5页The Journal of Light Scattering

基　　金：国家自然科学基金资助(编号:20173019;20273022;20375014;20473029)

摘　　要：一种聚硅氧烷侧链手性液晶P及其单体M的单层LB膜分别在11mN/m和8mN/m的表面压力下,从水汽界面成功地转移到在镀金玻璃片和氟化钙基片上。π-A曲线表明P及其单体M在水汽界面上单层膜的崩溃压力分别是35和11mN/m。红外透过和反射吸收光谱表明两者的生色团部分及烷基链部分倾斜排列在固体基片上,但其倾斜角不同。M比P有更大的倾斜角。同时,不论P或M其烷基链的轴向与芳香核部分的长轴方向并不重合。P的烷基链比M的烷基链更有序。Monolayer Langmuir-Blodgett films of a side-chain ferroelectric liquid crystalline P and its monomer M were transferred at a surface pressure of 11 and 8 mNm-1onto solid sub- strates, respectively. Theπ-A isotherms of the Langmuir films showed that the collapse pres- sure is about 35 and 11 mNm-1, respectively, for P and M. Infrared (IR) transmission and reflection-absorption (RA) spectra of Langmuir-Blodgett (LB) films of P and M indicate that the long axis of the chromophoric part of P is almost perpendicular to the substrate surface while that of M is tilted with the respective to the substrate normal. The alkyl parts of both P and M are tilted considerably from the substrate normal.

关 键 词：红外光谱 LANGMUIR-BLODGETT膜 手性液晶 

分 类 号：O641[理学—物理化学]