Slow magnetisation relaxation in tetraoxolene-bridged rare earth complexes
Maja A Dunstan, Elodie Rousset, Marie-Emmanuelle Boulon, Robert W Gable, Lorenzo Sorace, Colette Boskovic
DALTON TRANSACTIONS | ROYAL SOC CHEMISTRY | Published : 2017
Three families of tetraoxolene-bridged dinuclear rare earth (RE) complexes have been synthesised and characterised, with general formula [((HB(pz)3)2RE)2(μ-tetraoxolene)] (HB(pz)3- = hydrotris(pyrazolyl)borate; tetraoxolene = chloranilate (1-RE), the dianionic form of 2,5-dihydroxy-1,4-benzoquinone (2-RE), or its 3,6-dimethyl analogue (3-RE)). In each case, the bridging tetraoxolene ligand is in the diamagnetic dianionic form and species with selected lanthanoid(iii) ions from Eu(iii) to Yb(iii) have been obtained, as well as the diamagnetic Y(iii) analogues. Use of the 3,6-dimethyl substituted tetraoxolene ligand (Me2-dhbq2-) has also afforded the two byproducts [((HB(pz)3)(MeOH)(B(OMe)4)Y)..View full abstract
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Awarded by Australian Research Council
We thank the Australian Research Council for financial support (DP150100353 and DP170100034). Part of this research was undertaken on the MX1 beamline at the Australian Synchrotron, Victoria, Australia.