Facile Syntheses of Dioxythiophene-Based Conjugated Polymers by Direct C–H Arylation
作者:Haichao Zhao、Ching-Yuan Liu、Shyh-Chyang Luo、Bo Zhu、Tsai-Hui Wang、Hsiu-Fu Hsu、Hsiao-hua Yu
DOI:10.1021/ma300719n
日期:2012.10.9
Various substituted dioxythiophenes bearing 3,4-propylenedioxythiophenes (ProDOT) and 3,4-ethylenedioxythiophene (EDOT) moieties successfully undergo Pd-catalyzed direct C–H arylation to yield π-conjugated polymers. The effects of palladium catalysts, phosphine ligands or additives, and functional groups on this facile polycondensation approach are investigated. Polymers from alkoxy-substituted ProDOT
各种带有3,4-亚丙二氧基噻吩(ProDOT)和3,4-亚乙二氧基噻吩(EDOT)部分的取代二氧噻吩成功地进行了Pd催化的直接C–H芳基化,生成π共轭聚合物。研究了钯催化剂,膦配体或添加剂以及官能团对这种简便的缩聚方法的影响。由烷氧基取代的ProDOT合成的聚合物具有合理的分子量(M n= 6100–9600)和低PDI(1.3–1.9)。带有烷氧基或受保护的官能团的四个取代的EDOT也经过直接的C–H芳基化缩聚反应生成相应的聚合物。所获得的聚二氧噻吩的紫外可见吸收范围为480至590 nm,这些共轭聚合物具有电活性,并且在施加电势时可逆地在氧化态和中性态之间切换。