新型有机共轭高分子受体材料的合成及性能研究

The design, synthesis, and characterization of organic conjugated polymers with high electron affinities, especially organic conjugated polymers based on naphthalene tetracarboxylic diimides and perylene tetracarboxylic diimides have attracted much attention due to their unique optical and electronic properties, and potential applications in organic thin film transistors and photovoltaic cells. We are particularly interested in the design and synthesis of novel π-extended electron-poor molecules based on rylene diimides with unique optoelectronic properties. In this project, naphthalene tetracarboxylic diimides, perylene tetracarboxylic diimides, and larger rylene tetracarboxylic diimides will be chosen as building blocks for novel conjugated polymers, which may have broad absorption, high electron affinities and be solution processible..Firstly, Heck, Stille, Suzuki and Sonogashira cross-couplings have proved to be an especially popular tool for carbon-carbon bond formation, which will be used to build single-linked hybrid rylene array polymers. In order to build fully conjugated hybrid rylene array polymers, we will develop a facile and efficient method by combining the traditional carbon-carbon bond formation (Stille or Suzuki) and C-H transformation. Secondly, different functional groups will be introduced to the novel hybrid rylene array copolymers in order to tune their optoelectronic properties and self-assemble behaviours. And the relationship between chemical structure and optoelectronic properties will be investigated systematically. Moreover, the applications of novel hybrid rylene array copolymers with high electron affinities in electronic devices, especially in organic thin film transistors and photovoltaic cells will be also investigated.

新型有机共轭高分子受体材料由于其独特的光电性质，是有机场效应晶体管、有机太阳能电池等分子器件的关键材料，尤其是基于萘酰亚胺、苝酰亚胺的有机共轭高分子的研究引起了人们的广泛关注。本项目以萘酰亚胺、苝酰亚胺、以及同系的缺电子共轭分子体系为基本模块，重点在于通过对构筑共轭高分子的传统合成方法的优化与创新，开发出具有窄能量带隙、宽光谱吸收、和好的加工性能的新型有机共轭高分子受体材料。进一步地，选择性地引入功能性单元对其自组装行为和光电性质进行调控，设计合成出适用于器件研究的有机共轭高分子材料，系统地研究结构性能的构效关系，优化筛选出各项性能优异的实用性材料，深入地探索其作为受体材料在分子器件，特别是在场效应晶体管、太阳能电池方面的应用。

新型有机共轭高分子受体材料由于其独特的光电性质，是有机场效应晶体管、有机太阳能电池等分子器件的关键材料，尤其是基于萘酰亚胺、苝酰亚胺的有机共轭高分子的研究引起了人们的广泛关注。本项目以萘酰亚胺、苝酰亚胺、以及同系的缺电子共轭分子体系为基本模块，通过对构筑共轭高分子的传统合成方法的优化与创新，开发出了具有窄能量带隙、宽光谱吸收、和好的加工性能的新型有机共轭高分子受体材料，即杂化Rylene 酰亚胺类新型n型有机共轭高分子齐聚物。系统地总结了二聚体、三聚体、五聚体以及更长共轭高分子齐聚物之间结构性能的构效关系，积累了有机共轭高分子功能材料设计规律及合成方法的改进方面的经验，优化筛选出了各项性能优异的材料，深入地探索了其作为有机半导体受体材料在有机电子器件，尤其是在有机场效应晶体管、有机太阳能电池方面的应用。其中，五聚体杂化Rylene 酰亚胺的薄膜场效应晶体管在空气中的电子迁移率高达1.7cm2V-1s-1,这在具有大的刚性共轭结构的梯形低聚物中还未见报道，对深入地探索其作为受体材料在分子器件方面的应用打下了很好的基础。