Field-Induced Slow Magnetic Relaxation of GdIII Complex with a Pt-Gd Heterometallic Bond

Heterometallic Gd-Pt complexes ([Gd2Pt3(H2O)(2)(SAc)(12)] (SAc=thioacetate), [Y1.4Gd0.6Pt3(H2O)(2)(SAc)(12)], and [Gd2Pt3(H2O)(6)(SAc)(12)]7H(2)O have been synthesized. The crystal structures and DFT calculations indicated a Gd-Pt heretometallic bond. Single-crystal ESR spectra determined the direction of magnetic anisotropy as direction of the Gd-Pt bond. In other words, the Gd-Pt bond dictates the direction of magnetic anisotropy. The heterometallic Gd-Pt bond lowers the symmetry of the Gd ion, splitting the Kramers doublet in a dc field. Thus, we observed clear field-induced slow magnetic relaxation of [Y1.4Gd0.6Pt3(H2O)(2)(SAc)(12)] up to 36K. The relaxation process was determined to be a direct process.