Four new Schiff‐base type conjugative polymers (CPs), that is, Py_1‐4 carrying a strong electron‐withdrawing cyanopyridine scaffold coupled with different electron‐donating aromatic/heteroaromatic moieties were synthesized from their respective co‐monomers by simple poly‐condensation route. They were subjected to structural, thermal, photophysical, and electrochemical characterizations and theoretical investigations in order to identify their suitability in polymer light‐emitting diode (PLED) application. All these polymers showed good film‐forming ability and exhibited favorable photophysical behaviors with an optical bandgap in the order of 2.54‐2.68 eV. Further, their electrochemical data were used to evaluate highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels. Finally, Py_1‐4 were successfully employed as blue‐light emitter in the construction of new ITO/PEDOT:PSS/ Py_1‐4/Al configured light‐emitting diodes (LED), and the fabricated devices demonstrated stable blue electroluminescence behavior endorsing an effective electrons injection in the PLEDs.

中文翻译：

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新型基于氰基吡啶的π共轭聚（甲亚胺）：合成，表征和电致发光研究

四种新的席夫碱型共轭聚合物（CP），即Py _1-4通过简单的缩聚方法，由它们各自的共聚单体合成了带有强吸电子的氰基吡啶骨架以及不同的给电子性芳族/杂芳族部分。为了确定它们在聚合物发光二极管（PLED）应用中的适用性，对它们进行了结构，热，光物理和电化学表征以及理论研究。所有这些聚合物均表现出良好的成膜能力，并表现出良好的光物理行为，其光学带隙约为2.54-2.68 eV。此外，他们的电化学数据用于评估最高占据分子轨道（HOMO）和最低未占据分子轨道（LUMO）的水平。最后，Py _1-4被成功地用作新型ITO / PEDOT：PSS / Py _1-4 / Al配置的发光二极管（LED）的蓝光发射器，并且所制造的器件表现出稳定的蓝色电致发光性能，从而支持了有效的电子注入。 PLED。