Insights into Magnetic Interactions in a Monodisperse Gd12 Fe14 Metal Cluster

Angew Chem Int Ed Engl. 2017 Sep 11;56(38):11475-11479. doi: 10.1002/anie.201705697. Epub 2017 Aug 9.

Abstract

The largest Ln-Fe metal cluster [Gd12 Fe14 (μ3 -OH)12 (μ4 -OH)6 (μ4 -O)12 (TEOA)6 (CH3 COO)16 (H2 O)8 ]⋅(CH3 COO)2 (CH3 CN)2 ⋅(H2 O)20 (1) and the core-shell monodisperse metal cluster of 1 a@SiO2 (1 a=[Gd12 Fe14 (μ3 -OH)12 (μ4 -OH)6 (μ4 -O)12 (TEOA)6 (CH3 COO)16 (H2 O)8 ]2+ ) were prepared. Experimental and theoretical studies on the magnetic properties of 1 and 1 a@SiO2 reveal that encapsulation of one cluster into one silica nanosphere not only effectively decreases intermolecular magnetic interactions but also significantly increases the zero-field splitting effect of the outer layer Fe3+ ions.

Keywords: lanthanides; magnetic interactions; monodispersity; silica nanospheres; transition-metal clusters.

Publication types

  • Research Support, Non-U.S. Gov't