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

9510274 Curtis高度共轭聚合物是用作电池或传感器中的电极、LED中的发光半导体以及抗腐蚀或抗静电涂层的有前景的材料。 这项研究开辟了生产具有可调性能的新聚合物的可能性。 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），PABT。 这些新的聚合物具有烷基侧链，使它们可溶于常见的有机溶剂中，并且可以从这些溶液中浇铸薄膜。 这些新的聚合物是区域规则的，并显示出前所未有的多态性与随之而来的多色性。 热的溶剂退火的膜诱导的固态相变，其特征在于由大的共轭长度的增加和带隙的减少。 本研究旨在确定多晶型相的结构，并确定聚合物侧链的分子结构如何影响固态堆积、相变能量学、结晶度、导电性和光致或电致发光效率。 模型低聚物将被合成，并通过X-射线衍射确定其三维结构。 这些模型研究将有助于解释的X射线和EXAFS数据的高分子量聚合物。 聚合物和模型低聚物将掺杂有各种氧化剂，并且结构和光谱性质（UV-VIS、ESR、磁化率等）将被改变。的掺杂系统将被确定，并与中性前体进行比较。这种系统的结构-性能关系的研究将提供新的数据，用于优化聚合物结构的特定性能，例如高导电性，高电致发光效率，热或光稳定性等。PABT具有一个基本的氮官能团的链骨架，可以被烷基化或用于形成金属络合物。 这些反应沿着改变电势 锁链 这样的变化可以用于改变电导率或用作激子陷阱以增加发光效率并改变发射光的波长。 ***

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. ***