thienopyrazine-based donor–acceptor–donor (D–A–D) near-infrared (NIR) fluorescent compounds were synthesized through a rapid, palladium-catalyzed C–H activation route. The dyes were studied through computational analysis, electrochemical properties analysis, and characterization of their photophysical properties. Large Stokes shifts of approximately 175 nm were observed, which led to near-infrared emission. Computational
通过快速、
钯催化的 C-H 活化途径合成了一系列基于
噻吩并
吡嗪的供体-受体-供体 (D-A-D) 近红外 (NIR) 荧光化合物。通过计算分析、电
化学特性分析和光物理特性表征对
染料进行了研究。观察到约 175 nm 的大斯托克斯位移,这导致近红外发射。计算评估表明,这种大斯托克斯位移的起源是显着的分子
重组,尤其是 D-A 键的
重组。该系列的量子产率高达 φ = >4%,发射最大值范围为 725 至 820 nm。在溶液中、薄膜中以及单分子
水平上的隔离中,发射很强。它们在单分子
水平上的稳定发射使这些化合物成为近红外单分子光子源的良好候选者。