Since the 1960s, poly(benzobisimidazobenzophenathrolinedione) (BBL) has been the only n-type ladder-type conjugated polymer (LCP) that is utilized in thin film electronic devices. Its high electrochemical and thermal stabilities make it a promising candidate for organic electrochemical transistors (OECTs) and thermoelectrics (OTEs) applications. Here we report the synthesis and characterization of a new π-extended poly(benzimidazoanthradiisoquinolinedione) (BAL). The tetrachlorinated BAL (Cl4-BAL) is fully soluble in methanesulfonic acid (MSA) and can be spin-coated into good quality thin films, enabling the fabrication and characterization of OTEs. Doping of Cl4-BAL films using our in-house benzyl viologen radical cation (BV^●+) n-dopant shows better electrical air-stability as compared to BBL due to its very low LUMO value (−4.83 eV), making it a promising material toward air-stable n-doped conducting polymers.

中文翻译：

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π-扩链聚(苯并咪唑蒽二异喹啉二酮)梯型共轭聚合物

自 1960 年代以来，聚（苯并双咪唑并苯并吩咯啉二酮）（BBL）一直是唯一用于薄膜电子器件的 n 型梯型共轭聚合物（LCP）。其高电化学和热稳定性使其成为有机电化学晶体管 (OECT) 和热电 (OTE) 应用的有希望的候选者。在这里，我们报告了一种新的 π 扩展聚（苯并咪唑并蒽二异喹啉二酮）（BAL）的合成和表征。四氯化 BAL (Cl4-BAL) 完全溶于甲磺酸 (MSA)，可以旋涂成高质量的薄膜，从而能够制造和表征 OTE。^{使用我们内部的苄基紫精自由基阳离子 (BV ●+} ) 掺杂 Cl4-BAL 薄膜) 与 BBL 相比，n 掺杂剂由于其非常低的 LUMO 值（-4.83 eV）显示出更好的电空气稳定性，使其成为用于空气稳定的 n 掺杂导电聚合物的有前途的材料。