Journal article

Single-ion anisotropy and exchange coupling in cobalt(ii)-radical complexes: insights from magnetic and ab initio studies

Gemma K Gransbury, Marie-Emmanuelle Boulon, Richard A Mole, Robert W Gable, Boujemaa Moubaraki, Keith S Murray, Lorenzo Sorace, Alessandro Soncini, Colette Boskovic

CHEMICAL SCIENCE | ROYAL SOC CHEMISTRY | Published : 2019

Abstract

The concurrent effects of single-ion anisotropy and exchange interactions on the electronic structure and magnetization dynamics have been analyzed for a cobalt(ii)-semiquinonate complex. Analogs containing diamagnetic catecholate and tropolonate ligands were employed for comparison of the magnetic behavior and zinc congeners assisted with the spectroscopic characterization and assessment of intermolecular interactions in the cobalt(ii) compounds. Low temperature X-band (ν ≈ 9.4 GHz) and W-Band (ν ≈ 94 GHz) electron paramagnetic resonance spectroscopy and static and dynamic magnetic measurements have been used to elucidate the electronic structure of the high spin cobalt(ii) ion in [Co(Me3tp..

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Grants

Awarded by Australian Research Council


Awarded by Italian MIUR


Funding Acknowledgements

We thank the Australian Research Council for financial support to CB and LS through DP150100353. GKG acknowledges the support of an Elizabeth and Vernon Puzey Scholarship from the University of Melbourne and an Australian Government Research Training Scholarship. LS and MEB acknowledge the financial support from Italian MIUR through Project No. PRIN 2015-HYFSRT. The authors wish to thank Dr Willem Van den Heuvel for guidance on ab initio calculations, Mr Edward Nagul for running ICP-OES and Dr Nick Chilton for helpful discussions. This research was supported by use of the NeCTAR Research Cloud, a collaborative Australian research platform supported by the National Collaborative Research Infrastructure Strategy (NCRIS).