Carbonate-Bridged Dinuclear and Trinuclear Dysprosium(III) Single-Molecule Magnets

TL;DR

This paper reports the synthesis of carbonate-bridged dysprosium single-molecule magnets, demonstrating how structural modifications influence their magnetic relaxation barriers, with potential implications for magnetic data storage.

Contribution

It introduces new carbonate-bridged Dy(III) SMMs and analyzes how their structures affect magnetic relaxation barriers, expanding understanding of structure-property relationships.

Findings

Dimeric and trimeric Dy(III) SMMs were synthesized with carbonate bridges.

Effective relaxation barriers decreased to 51 K and 422 K respectively.

Structural modifications correlate with changes in magnetic relaxation barriers.

Abstract

In 2016, we reported a single-ion magnet [Dy(bbpen)Br] with an energy barrier over 1000 K. Here a dimeric [Dy2(mu-CO3)(bbpen)2(H2O)].H2O.CH3OH (1) and a trimeric [Dy3(mu3-CO3)(bppen)3](CF3SO3).H2O (2) single-molecule magnets (SMMs) were obtained through replacing the Br- anion with the carbonate bridge. Their effective relaxation barriers at zero dc field are decrease to 51 K and 422 K, respectively, which are consist with their structural modifications.