Abstract

In this chapter, the optical and magnetic properties of multifunctional cyanido-bridged metal assemblies are introduced. Cyanido-bridged metal assemblies draw much attention due to their magnetic properties and functionalities. As for magnetic properties, they have an advantage to show long-range magnetic ordering due to strong magnetic couplings between magnetic metal ions via cyanide. In addition, the cyanido-bridged metal assemblies can acquire structural diversity and various electronic states by combination of metal ions and ligand, resulted in their functionalities. For examples, introduction of transition metal ions showing charge transfer and spin crossover could allow switching of spin states by external stimuli, and metal assemblies containing lanthanide ions are expected to show luminescence and slow magnetic relaxation. Herein, some cyanido-bridged metal assemblies with unique characters of photoinduced magnetization, luminescence, and slow magnetic relaxation are presented.

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