Highly Conjugated Poly(thiophene)s − Synthesis of Regioregular 3-Alkylthiophene Polymers and 3-Alkylthiophene/Thiophene Copolymers
作者:Jean-Pierre Lère-Porte、Joël J. E. Moreau、Christophe Torreilles
DOI:10.1002/1099-0690(200104)2001:7<1249::aid-ejoc1249>3.0.co;2-f
日期:2001.4
5-bromo-4-octyl-2,2′-bi(thiophene) have been selectively prepared. Condensation reactions in the presence of Pd2(dba)3(CHCl3)/4 PPh3 led to high yields (ca. 90%) of regioregular poly(3-octylthiophene) (Mw = 21.4 × 104, Mw/Mn = 1.48) and poly[4-octylbi(thiophene)] (Mw = 3.8 × 104, Mw/Mn = 1.1). The regioregularity of the head-to-tail (HT) coupling has been determined by 1H NMR, which showed HT > 95% for poly(3-octylthiophene)
已经选择性地制备了 2-bromo-3-octylthiophene 和 5-bromo-4-octyl-2,2'-bi(thiophene) 的三丁基锡衍生物。在 Pd2(dba)3(CHCl3)/4 PPh3 存在下的缩合反应导致区域规整聚(3-辛基噻吩)(Mw = 21.4 × 104,Mw/Mn = 1.48)和聚[4-辛基双(噻吩)] (Mw = 3.8 × 104, Mw/Mn = 1.1)。头对尾 (HT) 偶联的区域规整性已通过 1H NMR 确定,表明聚(3-辛基噻吩)的 HT > 95% 和新聚 [4-辛基双(噻吩)] 的 HT > 90% . 这些材料的共轭特性已通过 FT-IR 和 UV/Vis 光谱表征。与相应的无规聚合物相比,新的常规聚合物的吸收最大值移至更高的波长(分别为 λmax = 448 和 466 nm)。平均共轭长度随着偶联区域规整性的增加和共轭链上