Journal article

Tetraoxolene-bridged rare-earth complexes: a radical-bridged dinuclear Dy single-molecule magnet

William R Reed, Maja A Dunstan, Robert W Gable, Wasinee Phonsri, Keith S Murray, Richard A Mole, Colette Boskovic

Dalton Transactions | ROYAL SOC CHEMISTRY | Published : 2019


Two families of neutral tetraoxolene-bridged dinuclear rare earth complexes of general formula [((HBpz3)2RE)2(μ-tetraoxolene)] (RE = Y and Dy; HBpz3- = hydrotris(pyrazolyl)borate; tetraoxolene = fluoranilate (fa2-; 1-RE) or bromanilate (ba2-; 2-RE)) have been synthesised and characterised. In each case, the bridging tetraoxolene ligand is in the diamagnetic dianionic form and each rare earth metal centre has two HBpz3- ligands completing the coordination. Electrochemical studies on the soluble 2-RE family reveal a tetraoxolene-based reversible one-electron reduction. Bulk chemical reduction with cobaltocene affords the cobaltocenium (CoCp+) salt of the 1e-reduced analogue: [CoCp][((HBpz3)2RE..

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Awarded by Australian Research Council

Funding Acknowledgements

We thank the Australian Research Council for financial support (DP170100034) to CB, KSM and RAM. MAD thanks AINSE for an AINSE Post-Graduate Research Award. This research was undertaken in part using the PPMS at the Australian Centre for Neutron Scattering and the MX1 and MX2 beamlines at the Australian Synchrotron (using the Australian Cancer Research Foundation (ACRF) detector), both part of ANSTO.