Photoswitchable spin crossover nanoparticles

During the last few decades, the photoswitching of spin crossover compounds, based on the Light-Induced Excited Spin State Trapping (LIESST) effect, has been widely studied. More recently, the synthesis and characterization of spin crossover nanoparticles have been developed. This focused review describes the recent progress in the characterization of the photo-excitation and relaxation processes in spin crossover nanoparticles, for both large assemblies and single nano-objects. A discussion of the size-reduction effect on such processes is presented.