Research Progress of Metal–Organic Radical Materials and Applications

Metal–organic radical luminescent materials, as an emerging research direction in the field of optoelectronic functional materials, have attracted extensive attention due to their unique open‐shell electronic structures and controllable photophysical properties. This review provides an in‐depth discussion of metal–organic free radical materials from multiple perspectives, including the optical physical properties, construction strategies, metal action mechanisms, and practical applications in the field of photoelectric magnetism. Especially in terms of the interaction between metals and organic radicals as well as the applications, the specific influence of the charge‐transfer process between metals and organic radicals was discussed in detail, along with the potential applications in fields such as photodriven sensing, photothermal conversion, and photoelectromagnetic coupling. Although the number of literature on metal–organic free radicals has significantly increased in recent years, most existing research articles and review articles are limited to specific metal systems and lack systematic comparison. The depth of discussion on the structure–activity relationship of the materials is insufficient, and the discussion on the application transformation path is also rather vague. This review aims to break through the above limitations, provide comprehensive references for researchers, and promote the further development of the field of metal–organic free radical luminescent materials.