Fe(II) spin crossover molecule-based materials

Spin crossover complex has an ideal molecular Instability in which a single molecule or an assembly of molecules can be used as active elements in novel thermal switches, optical switches or information memory devices. The important progress over the past three years on Fe(II) spin crossover molecule-based materials is reviewed in this paper. These materials include the Fe(II) spin crossover complexes showing a spin transition close to room temperature, the Fe(II) spin crossover compounds with the light-induced excited spin state trapping (LIESST) effect and the multifunctional Fe(II) spin crossover materials with liquid crystalline properties, porous properties or electrical conductivity. The applications and perspectives of the Fe(II) spin crossover molecule-based materials are also discussed.