Synthesis of a 1,2-Dithienylethene-Containing Donor-Acceptor Polymer via Palladium-Catalyzed Direct Arylation Polymerization (DArP)
作者:Masayuki Wakioka、Natsumi Yamashita、Hiroki Mori、Yasushi Nishihara、Fumiyuki Ozawa
DOI:10.3390/molecules23040981
日期:——
palladium-catalyzed direct arylation polymerization (DArP). The reaction of dibromoisoindigo (1-Br) and DTE (2-H), in the presence of Pd₂(dba)₃·CHCl₃ (0.5 mol%), P(2-MeOC₆H₄)₃ (L1) (2 mol%), pivalic acid (1 equiv) as catalyst precursors, and Cs₂CO₃ (3 equiv) as a base affords poly(1-alt-2) with a high molecular weight (Mn up to 44,900). Although, it has been known that monomers, with plural C⁻H bonds, tend to
本文报道了通过钯催化的直接芳基化聚合(DArP)合成包含1,2-二噻吩基乙烯(DTE)单元的DA聚合物。在Pd 2(dba)3·CHCl 3(0.5mol%),P(2-MeOC 3 H 4)3(L1)(2mol%)存在下,二溴异靛蓝(1-Br)和DTE(2-H)反应,用新戊酸(1当量)作催化剂前体,用Cs 2 CO 3(3当量)作碱,得到高分子量(Mn高达44,900)的聚(1-alt-2)。尽管已知具有多个C⁻H键的单体倾向于在不希望的C⁻H位置通过直接芳基化形成不溶性物质;1-Br和2-H的反应可以干净地进行而不会溶解。所得的聚合物具有良好的控制结构,并在有机场效应晶体管(OFET)中表现出良好的电荷转移特性,与Migita⁻Kosugi⁻Stille交叉偶联聚合生产的聚合物相比。DArP产品在电流⁻电压曲线中显示出理想的线性关系,而Migita⁻Kosugi⁻Stille产品显示出电荷迁移率随VG的变化。