Electrochemical Annulation of Phenothiazines with Alkynes: Access to Anti-Kasha Triple-Emission, Light-Sensitive, and Room-Temperature Phosphorescent Materials

Novel anti-Kasha triple-emission materials, light-sensitive materials, and ultralong room-temperature phosphorescent materials were synthesized by an efficient electrochemical synthesis method for the first time. The experimental data and theoretical calculations demonstrate the anti-Kasha triple-emission characteristics of the phenothiazinium salts. These characteristics enable three-channel emission intensity ratio imaging for visualizing intercellular architectures and endow the ability to specifically target the mitochondria of living cells. Furthermore, the novel light-sensitive materials demonstrate a pronounced red shift upon light irradiation. Additionally, the novel phenothiazine-based ultralong room-temperature phosphorescent materials exhibit an extraordinarily long lifetime and a distinctive afterglow, highlighting significant potential for encryption applications in binary coding systems.