Photoreduction of Prussian Blue Intercalated into Titania Nanosheet Ultrathin Films

摘要

Photomagnetism has been one of the most attractive topics for the molecule-based magnetism community. In principle, this phenomenon is attributed to photoinduced electron transfer, leading to changes in the spin state. For example, in Co-Fe Prussian Blue, excitation of an intervalence charge transfer band results in trapping the metastable high-spin state. Previously, we have demonstrated a photomagnetic effect in the composite system of semiconductive CdS and magnetic Prussian Blue nanoparticles. Upon UV excitation, generated electrons in the conduction band of CdS were injected into Prussian Blue. As a result, ferromagnetic Prussian Blue was reduced to paramagnetic Prussian White.