This article presents the synthesis of a new family of naphthyl-fused phosphepines through Ni-mediated C-C coupling. Interestingly, the chlorophosphine oxide intermediate shows strong resistance toward oxidation/hydrolysis owing to a combination of steric hindrance and pnictogen interactions. However, it can undergo substitution reactions under specific conditions. The optical/redox properties and the electronic structure of these new π-systems were studied experimentally (UV/Vis absorption, emission, cyclic voltammetry) and computationally (TD-DFT calculations, NICS investigation). Taking advantage of the luminescence of these derivatives, a blue-emitting OLED has been prepared, highlighting that these novel π-conjugated P-heterocycles appear to be promising building blocks for solid-state lighting applications.

中文翻译：

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萘基吡啶类：发光扭曲的多环P-杂环。

本文介绍了通过Ni介导的CC偶联合成一个新的萘基融合的磷脂碱家族。有趣的是，由于空间位阻和光生原相互作用的结合，氯氧化膦中间体显示出对氧化/水解的强抵抗力。但是，它可以在特定条件下发生取代反应。这些新的π系统的光学/氧化还原特性和电子结构已通过实验（紫外/可见吸收，发射，循环伏安法）和计算（TD-DFT计算，NICS研究）进行了研究。利用这些衍生物的发光，制备了发蓝光的OLED，强调了这些新颖的π共轭P杂环似乎是固态照明应用的有前途的构建基块。