Field-Induced Slow Magnetic Relaxation of Gd^III Complex with a Pt−Gd Heterometallic Bond.

Yoshida, Takefumi; Cosquer, Goulven; Izuogu, David Chukwuma; Ohtsu, Hiroyoshi; Kawano, Masaki; Lan, Yanhua; Wernsdorfer, Wolfgang; Nojiri, Hiroyuki; Breedlove, Brian K.; Yamashita, Masahiro

Heterometallic Gd−Pt complexes ([Gd2Pt3(H2O)2(SAc)12] (SAc=thioacetate), [Y1.4Gd0.6Pt3(H2O)2(SAc)12], and [Gd2Pt3(H2O)6(SAc)12]⋅7 H2O 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 36 K. The relaxation process was determined to be a direct process.

MAGNETIC relaxation; GADOLINIUM compounds; METALLIC bonds; SINGLE crystals; MAGNETIC anisotropy

Chemistry - A European Journal, 2017, Vol 23, Issue 19, p4551

0947-6539

Academic Journal

10.1002/chem.201700886