Tetraphenylnaphthosiline (TPNS): a potential building block for deep-blue emitter featured aggregation-induced blue-shifted emission
作者:Han Wang、Weiqiang Feng、Guangshuai Gong、Hao Chen、Xin He、Baoxi Li、Tian Zhang、Zujin Zhao、Zhiming Wang、Ben Zhong Tang
DOI:10.1039/d2tc02940e
日期:——
active cyclization reaction, which is beneficial for subsequent structural optimization. Fortunately, the three TPNS-derived compounds not only inherited the AIE characteristics but also displayed deep-blue emission in the solid with obvious blueshifting from the solution state to the aggregated state. Employing electrochemical characterization, the high electron affinity of silicon-based heterocycles was
作为 AIEgens 的代表性组成部分,1,1,2,3,4,5-六苯基硅氧烷(HPS)由于其高电子亲和力,在构建高效 OLED 方面表现更好,但其合成过程过于苛刻,而且在宽带隙发射器中很难实现良好的荧光。根据我们报道的构建四苯基苯并硅氧烷 (TPBS) 衍生物的“苯并策略”,在这项工作中引入了萘基团来稠合含硅的六元环,并开发了一种名为萘甲硅烷 (NS) 的新型结构单元。与 TPBSs 的闭环反应中的自由基过程不同,四苯基萘酚 (TPNS) 的制备对于底物选择更为普遍。金属催化的C-H活性环化反应,有利于后续结构优化。幸运的是,三种 TPNS 衍生化合物不仅继承了 AIE 特性,而且在固体中表现出深蓝色发射,从溶液态到聚集态有明显的蓝移。采用电化学表征,硅基杂环的高电子亲和力也得以保持,并且它们的非掺杂旋涂 OLED 表现出令人印象深刻的性能,具有 2.0-3.5% 的更好的外部量子效率 (EQE)