Hydroxide-bridged Five-coordinate Dy Single-molecule Magnet Exhibiting the Record Thermal Relaxation Barrier of Magnetization Among Lanthanide-only Dimers

Overview

Journal Chem Sci

Publisher Royal Society of Chemistry

Specialty Chemistry

Date 2017 Apr 29

PMID 28451271

Citations 9

Authors

Jin Xiong

Hai-Yan Ding

Yin-Shan Meng

Chen Gao

Xue-Jing Zhang

Zhao-Sha Meng

Yi-Quan Zhang

Wei Shi

Bing-Wu Wang

Song Gao

Affiliations

Soon will be listed here.

Abstract

A hydroxide-bridged centrosymmetric Dy dimer with each Dy being five-coordinated has been synthesized using bulky hindered phenolate ligands. Magnetic studies revealed that this compound exhibits a slow magnetic relaxation of a single-ion origin together with a step-like magnetic hysteresis of the magnetic coupled cluster. The thermal relaxation barrier of magnetization is 721 K in the absence of a static magnetic field, while the intramolecular magnetic interaction is very large among reported 4f-only dimers. CASSCF calculations with a larger active space were performed to understand the electronic structure of the compound. The thermal relaxation regime and the quantum tunneling regime are well separated, representing a good model to study the relaxation mechanism of SMMs with intramolecular Dy-Dy magnetic interactions.

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