A series of ester-functionalized polythiophenes (P3OETs) with precisely controlled head-to-tail (HT) ratios was synthesized via palladium-catalyzed direct arylation polycondensation (DArP). The ionization potentials and optical bandgaps of P3OETs decreased as their HT ratios increased because of the increased backbone coplanarity and extensive π-electron delocalization. The method of precisely controlling the regioregularity and HT ratio can contribute to the design of new polythiophene derivatives with enhanced electronic functionality. A series of ester-functionalized polythiophenes (P3OETs) with precisely controlled head-to-tail (HT) ratios was synthesized via palladium-catalyzed direct arylation polycondensation (DArP). The ionization potentials and optical bandgaps of P3OETs decreased as their HT ratios increased because of the increased backbone coplanarity and extensive π-electron delocalization. The method of precisely controlling the regioregularity and HT ratio can contribute to the design of new polythiophene derivatives with enhanced electronic functionality.

中文翻译：

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通过直接芳基化缩聚反应区域控制合成酯官能化聚噻吩

通过钯催化的直接芳基化缩聚（DArP）合成了一系列具有精确控制的头尾（HT）比例的酯官能化聚噻吩（P3OET）。由于骨架共面性增加和广泛的 π 电子离域，P3OET 的电离电位和光学带隙随着其 HT 比的增加而降低。精确控制区域规整性和 HT 比的方法有助于设计具有增强电子功能的新型聚噻吩衍生物。通过钯催化的直接芳基化缩聚（DArP）合成了一系列具有精确控制的头尾（HT）比例的酯官能化聚噻吩（P3OET）。由于骨架共面性增加和广泛的 π 电子离域，P3OET 的电离电位和光学带隙随着其 HT 比的增加而降低。精确控制区域规整性和 HT 比的方法有助于设计具有增强电子功能的新型聚噻吩衍生物。