为了说明调节TP-的电子和光学性能的能力,制备了2,3-双官能化的噻吩并[3,4- b ]吡嗪(TP)和9,9-二辛基芴的四种供体-受体(DA)共聚物。通过选择TP单元上的侧链来制备基于DA的DA聚合物。另外,制备具有和不具有噻吩间隔基单元的类似聚合物,以便讨论它们对材料性能的影响。这种效果的组合允许在1.6–2.1 eV的范围内调整带隙。报告了所有材料的完整光学和电化学特性,以及代表性材料的初始光伏器件数据。
Synthesis and Characterization of Thieno[3,4-b]pyrazine-Based Terthienyls: Tunable Precursors for Low Band Gap Conjugated Materials
摘要:
Synthetic methods have been developed for the preparation of new 2,3-dihalo- and 2,3-ditriflato-5,7-bis(2-thienyl)thieno[3,4-b]pyrazines. From these reactive intermediates, a variety of new 2,3-difunctionalized 5,7-bis(2-thienyl)-thieno[3,4-b]pyrazines have been produced as precursors to conjugated materials. Structural, electronic, and optical characterization of these new analogues illustrate the extent to which the electronic nature of the functional groups can be used to tune the electronic properties of these thieno[3,4-b]pyrazine-based terthienyl units.