Building on the recent systematic research on 1H-benzo[f]indole (Bd), an important advancement in constructing ultralong organic room temperature (UORTP) materials with a universal strategy via a readily obtained unit (7H-Benzo[c]carbazole, BCz) is proposed in this work. Pure powders of BCz and its derivatives merely exhibit blue fluorescence at ambient condition. However, when BCz and its derivatives are dispersed into polymer or powder matrixes, strong photo-activated green UORTP can be observed from their doped systems at room temperature. Moreover, the UORTP color can be tuned between green and yellow depending on the matrix. The ultralong phosphorescence originates from the generation of charge-separated states via radicals. The matrixes play a key role in both stabilizing charge-separated states and controlling UORTP color. More interestingly, when using polymethyl methacrylate as matrix, the doped films achieve stronger photo-activated ultralong phosphorescence underwater than in air at room temperature. Compared with Bd, BCz achieves better performance not only in ultralong phosphorescence properties but also in practical applications. This work gains a deeper insight into the mechanism of UORTP and paves a new approach to applying organic phosphorescent materials to underwater coating and imaging.

基于最近对 1 H-苯并[ f ]吲哚（Bd）的系统研究，通过容易获得的单元（7H-苯并[f]吲哚（Bd））以通用策略构建超长有机室温（UORTP）材料方面取得了重要进展。]咔唑，BCz）是在这项工作中提出的。BCz及其衍生物的纯粉末在环境条件下仅表现出蓝色荧光。然而，当 BCz 及其衍生物分散到聚合物或粉末基质中时，在室温下可以从其掺杂体系中观察到强光活化的绿色 UORTP。此外，UORTP 颜色可以根据矩阵在绿色和黄色之间调整。超长磷光源自通过自由基产生电荷分离态。基质在稳定电荷分离状态和控制 UORTP 颜色方面发挥着关键作用。更有趣的是，当使用聚甲基丙烯酸甲酯作为基质时，掺杂薄膜在水下比在室温下的空气中获得更强的光激活超长磷光。与Bd相比，BCz不仅在超长磷光性能方面而且在实际应用中也取得了更好的性能。该工作深入了解了UORTP的机理，为有机磷光材料应用于水下涂层和成像开辟了新途径。