以喹吖啶酮为核的线型并苯小分子及梯型聚合物的合成及其场效应性能研究

Organic semiconducting materials are one of the frontiers and hotspots in the research of organic optoelectronic functional materials. As one of the most important material for small molecule OFETs, linear acenes have been widely studied and a few materials with high mobility and on-off ratio have been synthesized. However, they are still suffering from stability issues. Also, linear acenes with ambipolar charge transport character are still rare. Quinacridone have been proved to be a cost-effective and highly stable semiconductor with bipolar charge transport ability, but the drawback is its low mobility and processability.. In order to address these issues, by combining the advantages of linear acenes and quinacridone, a few quinacridone derivatives with extended structure are proposed. By using the Diels-Alder adduct of anthracene and maleimide as the intermediate, the peripheral benzene rings in quinacridone molecule will be extended into anthracene rings. Linear ladder polymers with benzoquinacridone units can be further constructed based on this methodology. Solution processed, high mobility, OFETs devices with ambipolar charge transport ability can be prepared by using the "solution processable precursor - annealing" strategy.

有机半导体材料是目前有机光电功能材料研究的前沿和热点之一。线型并苯类化合物是一类具有高空穴迁移率和开关比的有机半导体材料。然而，它们存在双极传输材料缺乏，稳定性不足的缺点。喹吖啶酮是一类具有廉价、高稳定性优点的双极传输半导体材料；但其存在迁移率较低，溶液加工困难的缺点。. 为了解决这些问题，本项目拟结合线型并苯和喹吖啶酮各自的优点，对喹吖啶酮进行并苯拓展，利用蒽与马来酰亚胺的Diels-Alder加成物为中间体，将外围的苯环拓展为蒽环，设计合成以喹吖啶酮为核的线型并苯小分子及梯型聚合物材料。巧妙利用“可溶液加工前体-热处理”策略，提高其溶液加工性能，制备兼具高迁移率、双极传输和高稳定性的有机场效应晶体管器件。

有机半导体材料因其具有柔性、轻质、易加工以及易化学修饰等优点引起了广泛的关注。高性能有机半导体材料多由共轭的多环和杂环芳烃有机化合物构成，其中，当材料中的芳香性单元以并环方式相连时，材料通常具有表现出较好的性能，如较高的载流子迁移率，高的发光效率，高的稳定性等。本项目以此为背景，以有机半导体材料为研究目标，采用并环的分子设计策略，将一系列可传统的应用于有机光电材料的功能单元以并环方式进行衍生，合成了一系列新的多功能稠环芳烃衍生物，可应用于有机电致发光材料，有机电致变色材料等。