Marriott, K. E.R., Bhaskaran, L., Wilson, C. , Ochsenbein, S. T., Hill, S. and Murrie, M. (2015) Pushing the limits of magnetic anisotropy in trigonal bipyramidal Ni(II). Chemical Science, 6(12), pp. 6823-6828. (doi: 10.1039/C5SC02854J) (PMID:28757973) (PMCID:PMC5508675)
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Abstract
Monometallic complexes based on 3d transition metal ions in certain axial coordination environments can exhibit appreciably enhanced magnetic anisotropy, important for memory applications, due to stabilisation of an unquenched orbital moment. For high-spin trigonal bipyramidal Ni(II), if competing structural distortions can be minimised, this may result in an axial anisotropy that is at least an order of magnitude stronger than found for orbitally non-degenerate octahedral complexes. Broadband, high-field EPR studies of [Ni(MDABCO)2Cl3]ClO4 (1) confirm an unprecedented axial magnetic anisotropy, which pushes the limits of the familiar spin-only description. Crucially, compared to complexes with multidentate ligands that encapsulate the metal ion, we see only a very small degree of axial symmetry breaking. 1 displays field-induced slow magnetic relaxation, which is rare for monometallic Ni(II) complexes due to efficient spin–lattice and quantum tunnelling relaxation pathways.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Wilson, Dr Claire and Marriott, Miss Katie and Murrie, Professor Mark |
| Authors: | Marriott, K. E.R., Bhaskaran, L., Wilson, C., Ochsenbein, S. T., Hill, S., and Murrie, M. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Chemical Science |
| Publisher: | Royal Society of Chemistry |
| ISSN: | 2041-6520 |
| ISSN (Online): | 2041-6539 |
| Published Online: | 08 September 2015 |
| Copyright Holders: | Copyright © 2015 Royal Society of Chemistry |
| First Published: | First published in Chemical Science 6(12): 6823-6828 |
| Publisher Policy: | Reproduced under a Creative Commons License |
| Data DOI: | 10.5525/gla.researchdata.205 |
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