Journal article

Carbonate-Bridged Lanthanoid Triangles: Single-Molecule Magnet Behavior, Inelastic Neutron Scattering, and Ab Initio Studies

Marcus J Giansiracusa, Michele Vonci, Willem Van den Heuvel, Robert W Gable, Boujemaa Moubaraki, Keith S Murray, Dehong Yu, Richard A Mole, Alessandro Soncini, Colette Boskovic

INORGANIC CHEMISTRY | AMER CHEMICAL SOC | Published : 2016

Abstract

Optimization of literature synthetic procedures has afforded, in moderate yield, homogeneous and crystalline samples of the five analogues Na11[{RE(OH2)}3CO3(PW9O34)2] (1-RE; RE = Y, Tb, Dy, Ho, and Er). Phase-transfer methods have allowed isolation of the mixed salts (Et4N)9Na2[{RE(OH2)}3CO3(PW9O34)2] (2-RE; RE = Y and Er). The isostructural polyanions in these compounds are comprised of a triangular arrangement of trivalent rare-earth ions bridged by a μ3-carbonate ligand and sandwiched between two trilacunary Keggin {PW9O34} polyoxometalate ligands. Alternating-current (ac) magnetic susceptibility studies of 1-Dy, 1-Er, and 2-Er reveal the onset of frequency dependence for the out-of-phas..

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Grants

Funding Acknowledgements

We thank the Australian Research Council for financial support to C.B., K.S.M., and A.S. We thank the Bragg Institute, ANSTO, for access to neutron scattering facilities and providing technical support for the INS measurements. M.J.G. and M.V. thank AINSE for an Honors Scholarship and a Postgraduate Research Award, respectively. W.V.d.H. thanks the University of Melbourne for a McKenzie Postdoctoral Fellowship. Ab initio calculations were supported by use of the NeCTAR Research Cloud, a collaborative Australian research platform supported by the National Collaborative Research Infrastructure Strategy.