Photoswitchable high-dimensional CoII–[WV(CN)8] networks: Past, present, and future

2021 
The research and development of novel bistable magnetic materials is one of the most expanding areas of molecular magnetism. These materials are potentially suitable to be utilized in the construction of modern detectors, high-density data carriers, and devices for energy conversion. Until now, the greatest successes in this field have been achieved for magnetic cyanido-bridged metal assemblies. Among them, the greatest recognition is related to high-dimensional octacyanidometallate-based networks. In this Perspective, two- and three-dimensional cyanido-bridged CoII–[WV(CN)8] networks, exhibiting nontrivial magnetic properties (e.g., electron-transfer-coupled spin transition with broad thermal hysteresis and photoinduced spontaneous magnetization with relatively high Curie temperatures and large magnetic hysteresis loops) and other physicochemical properties (e.g., THz absorption and humidity sensitivity), are collected. All of them are model systems for development of bistable systems due to the presence of wide thermal hysteresis, and the formation of photoinduced metastable state tuned by temperature and wavelength of used light. Additionally, we summarized magnetostructural correlations within them, and we offered some guidelines for the improvement of their performances and the introduction of new functionalities and physicochemical cross-effects.
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