Differently substituted thiophene–thiophene-alternating copolymers were formally synthesized employing a halo-bithiophene as a monomer. Nickel-catalyzed polymerization of bithiophene with substituents at the 3-position, including alkyl-, fluoroalkyl-, or oligosiloxane-containing groups, afforded the corresponding copolymers in good to excellent yield. The solubility test in organic solvents was performed to reveal that several copolymers showed a superior solubility. X-ray diffraction analysis of the thin film of the alternating copolymers composed of methyl and branched oligosiloxane substituents was also performed, and the results suggested the formation of a dual-layered film structure.

中文翻译：

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带有不同取代基的区域规则和交替的噻吩-噻吩共聚物的形式制备

以卤素-联噻吩为单体，正式合成了不同取代的噻吩-噻吩交替共聚物。镍催化的联噻吩在3位带有取代基的取代基（包括烷基，氟烷基或低聚硅氧烷的基团）聚合，以良好或优异的收率获得了相应的共聚物。进行了在有机溶剂中的溶解度测试以显示几种共聚物显示出优异的溶解度。还对由甲基和支链低聚硅氧烷取代基组成的交替共聚物的薄膜进行了X射线衍射分析，结果表明形成了双层膜结构。