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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.

通过有机溶剂可溶性前驱体法制备了具有扩展π共轭结构的聚芳撑乙烯薄膜。研究了制备具有扩展π共轭结构的高质量薄膜的方法.建立了四种高光学性能聚芳撑乙烯薄膜（聚1，4-苯撑乙烯、聚2，3-二甲氧基-1，4-苯撑乙烯、聚7，5-噻吩撑乙烯和聚2，5-呋喃撑乙烯）的合成方法.在制备具有非常小的化学缺陷的前体聚合物和控制从前体聚合物到共辄聚合物的转化方面的成功使得能够系统地制备具有不同平均共辄长度的样品。通过对聚合物薄膜的紫外-可见光谱的检测，得到了聚合物薄膜平均共轭长度的信息;通过红外光谱的检测，得到了决定聚合物薄膜平均共轭长度的化学缺陷的信息.低聚物是聚（2，5-噻吩亚乙烯基）的模型化合物，它对识别共轭链上的缺陷结构非常有用。顺式-亚乙烯基键被发现是结构缺陷之一.理解了前体聚合物的柔性无规卷曲链在它们转化为刚性线性共轭链时的拉伸的重要性。采用转换过程中的拉伸技术获得具有高度延伸的共轭结构的聚合物样品。