LB film structure of poly(2-methoxy,5-(8-methoxy-3,6-dioxa-1-undecoxy)-p-phenylene vinylene) studied by spectroscopy
作者:Zhongkui Wu、Sanxie Wu、Yingqiu Liang
DOI:10.1016/s1386-1425(02)00392-x
日期:2003.5
structure for introducing di(ethylene oxide) methyl ether (DEOM) side chains to conjugated main chains. The long alkyl side chains are characterized by all trans-zigzag conformation and average tilt angle of 36+/-1.5 degrees. The layer-by-layer multilayer of MMDU-PPV obtained by Langmuir-Blodgett technique exhibits some in-plane anisotropy and more pure photoluminescence than that of the dilute MMDU-PPV
通过Gilch路线合成了PPV衍生物聚(2-甲氧基,5-(8-甲氧基-3,6-二氧杂-1--1-癸氧基)-对亚苯基亚乙烯基),以研究长烷基侧链的影响通过Langmuir-Blodgett(LB)技术获得的多层结构上的链和二(环氧乙烷)甲基醚基。紫外可见光,PL和FTIR光谱用于研究多层组织中MMDU-PPV分子的构象和取向。MMDU-PPV易于形成可转移的单层膜,其中pi系统的平面垂直于空气-水界面。LB膜中MMDU-PPV的相邻共轭主链以平行方式排列并与其pi系统的平面近似垂直于层平面堆积并且没有组织成紧凑的pi堆积结构以引入二(环氧乙烷)甲基醚(DEOM)侧链与共轭主链。长烷基侧链的特征是所有反式之字构型和36 +/- 1.5度的平均倾斜角。通过Langmuir-Blodgett技术获得的MMDU-PPV的逐层多层结构比MMDU-PPV稀溶液具有一定的面内各向异性和更纯的光致发光。