Poly(alkylbithiazoles): A New Class of Variable-Band Gap Conjugated Polymer

聚（烷基联噻唑）：一类新型可变带隙共轭聚合物

• 批准号: 9510274
• 负责人: M. David Curtis
• 金额: $ 30.14万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 1998-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9510274&HistoricalAwards=false
• 关键词: Poly; alkylbithiazoles; New; Class; Variable

9510274 Curtis Highly conjugated polymers are promising materials for use as electrodes in batteries or sensors, as the light-emitting semiconductor in LEDs, and as anti-corrosion or anti-static coatings. This research opens the possibility of producing new polymers with tunable properties. %%% Curtis' research group has recently synthesized a new class of conjugated polymers, the poly(alkylbithiazole)s, PABTs. These new polymers have alkyl side chains that render them soluble in common organic solvents, and thin films may be cast from these solutions. These new polymers are regioregular and show unprecedented polymorphism with attendant polychromism. Thermal of solvent annealing of the films induces solid state phase transformations that are characterized by large increases in the conjugated length and decreases in the band gap. This research seeks to determine the structures of the polymorphic phases and to determine how the molecular structure of the polymer side chains influences the solid-state packing, phase- transformation energetics, crystallinity, conductivity, and photo- or electroluminescence efficiency. Model oligomers will be synthesized and their 3-dimensional structures determined by X-ray diffraction. These model studies will aid the interpretation of X-ray and EXAFS data on the high MW polymers. The polymers and model oligomers will be doped with a variety of oxidants and the structures and spectroscopic properties (UV-VIS, ESR, magnetic susceptibility, etc.) of the doped systems will be determined and compared with the neutral precursors. This systematic study of structure-property relationships will provide new data for optimizing polymer structure for specific properties, e.g. high conductivity, high electroluminescence efficiency, thermal- or photo-stability, etc. The PABTs have a basic nitrogen functional group in the chain backbone that can be alkylated or used to form metal complexes. These reactions alter the potential along the chain. Such changes may be used to alter conductivity or to act as exciton traps to increase luminescence efficiency and alter the wavelength of the emitted light. ***

9510274柯蒂斯高共轭聚合物是很有前途的材料，可用作电池或传感器的电极，LED的发光半导体，以及防腐或防静电涂层。这项研究为生产具有可调性能的新聚合物提供了可能性。柯蒂斯的研究小组最近合成了一类新的共轭聚合物--聚(烷基联噻唑)S，简称PABTS。这些新聚合物具有烷基侧链，使其可溶于常见的有机溶剂，并可从这些溶液中浇铸薄膜。这些新聚合物是区域规则的，并表现出前所未有的多态和随之而来的多色。溶剂退火热导致薄膜的固态相变，其特征是共轭长度大幅度增加，禁带宽度减小。这项研究试图确定多晶相的结构，并确定聚合物侧链的分子结构如何影响固态堆积、相变能、结晶度、导电性和光电发光效率。合成了模型齐聚物，并用X射线衍射法测定了其三维结构。这些模型研究将有助于解释高相对分子质量聚合物的X射线和EXAFS数据。聚合物和模型低聚物将被掺杂各种氧化剂以及结构和光谱性质(UV-Vis，ESR，磁化率等)。将确定掺杂体系的数量，并与中性前体进行比较。这种结构-性质关系的系统研究将为优化特定性质的聚合物结构提供新的数据，例如高导电性、高电致发光效率、热稳定性或光稳定性等。PABT在链主干上具有碱性氮官能团，可以烷基化或用于形成金属络合物。这些反应改变了链条上的电势。这种变化可以用来改变导电性或充当激子陷阱，以提高发光效率并改变发射光的波长。***