Visible light-induced reversible photomagnetism in copper(II) octacyanomolybdate(IV)

Abstract

We report a visible light-induced reversible photomagnetism in CuII2[MoIV(CN)8]· 8H2O (1). By the irradiation with a 480-nm laser light, the compound 1 showed a spontaneous magnetization with a magnetic ordering temperature (Tc) of 30 K. Conversely, the magnetization and Tc. values were reduced by the irradiation with a 600-nm laser light. This photomagnetism is due to the reversible photo-induced electron transfer between paramagnetic 1 and its valence isomer exhibiting ferromagnetism.