Control of Average pi-Conjugation Length in Main-Chain Conjugated Polymers Prepared via Soluble Precursor Route

通过可溶性前体途径制备的主链共轭聚合物中平均π共轭长度的控制

基本信息

批准号：
02650653
负责人：
TSUTSUI Tetsuo
金额：
$ 1.22万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1990
资助国家：
日本
起止时间：
1990 至 1991
项目状态：
已结题

项目摘要

Polyarylenevinylene films with extended pi-conjugated structures were prepared via the organic solvent-soluble precursor route. The method to realize high-quality thin films with extended pi-conjugated structures were investigated.1. The synthetic methodology to prepare four polyarylenevinylene films (poly (1, 4-phenylenevinylene), poly (2, 3--dimethoxy-1, 4-phenylenevinylene), poly (7, , 5-thienylenevinylene) and poly (2, 5-furyienevinylene)) with high optical qualities were established.2. The success in both the preparation of precursor polymers with very small chemical defects and the control of conversion from precursor 'Polymer to conjugated polymers enabled the systematic preparation of samples with varied average conjugation lengths. Inspection of UV-visible spectra of polymer films gave the information concerning average conjugation lengths, and IR spectra gave the knowledge on the chemical defects which determined the average conjugation lengths.3. Oligomer compounds which are the model compounds of poly (2, 5thienylenevinylene) were very useful for identifying structures of defects on conjugated chains. The cis-vinylene linkages were found to be one of the structural defects.4. Importance of stretching of flexible random coil chains of precursor polymers, when they are converted to rigid linear conjugated chains were understood. The stretching-during-conversion technique was employed to obtain polymer samples with highly extended conjugated structures.

通过有机溶剂可溶的前体途径制备了具有扩展PI共轭结构的聚氧化乙烯膜。研究了使用扩展PI结合结构的高质量薄膜的方法。1。制备四个聚氧乙烯膜（聚（1，4-苯基乙烯），聚（2，3--二甲氧基-1，4-二甲基1，4-苯基乙烯），聚（7，，5-苯基乙烯基乙烯）和聚（2，5-二烯烃）的合成方法。在具有非常小的化学缺陷的前体聚合物制备方面的成功以及从前体聚合物到共轭聚合物的转化率的控制，都可以系统制备平均共轭长度的样品。对聚合物膜的紫外可见光谱的检查提供了有关平均共轭长度的信息，而红外光谱则提供了有关确定平均共轭长度的化学缺陷的知识。3。寡聚化合物是聚（2，5泰乙烯乙烯）的模型化合物，对于鉴定在共轭链上的缺陷结构非常有用。发现顺式 - 乙烯连接是结构缺陷之一。4。当理解将前体聚合物的柔性随机线圈链拉伸到刚性线性共轭链时的重要性。采用拉伸转换技术来获得具有高度扩展共轭结构的聚合物样品。