Asymmetric Ring Opening in a Tetrazine-Based Ligand Affords a Tetranuclear Opto-Magnetic Ytterbium Complex |
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| Authors: | Paul Richardson Dr. Riccardo Marin Yixin Zhang Dr. Bulat Gabidullin Dr. Jeffrey Ovens Dr. Jani O. Moilanen Prof. Muralee Murugesu |
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| Affiliation: | 1. Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie Pvt., Ottawa, ON, K1N 6N5 Canada;2. Department of Chemistry, Nanoscience Centre, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland |
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| Abstract: | We report the formation of a tetranuclear lanthanide cluster, [Yb4(bpzch)2(fod)10] ( 1 ), which occurs from a serendipitous ring opening of the functionalised tetrazine bridging ligand, bpztz (3,6-dipyrazin-2-yl-1,2,4,5-tetrazine) upon reacting with Yb(fod)3 (fod−=6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octandionate). Compound 1 was structurally elucidated via single-crystal X-ray crystallography and subsequently magnetically and spectroscopically characterised to analyse its magnetisation dynamics and its luminescence behaviour. Computational studies validate the observed MJ energy levels attained by spectroscopy and provides a clearer picture of the slow relaxation of the magnetisation dynamics and relaxation pathways. These studies demonstrate that 1 acts as a single-molecule magnet (SMM) under an applied magnetic field in which the relaxation occurs via a combination of Raman, direct, and quantum tunnelling processes, a behaviour further rationalised analysing the luminescent properties. This marks the first lanthanide-containing molecule that forms by means of an asymmetric tetrazine decomposition. |
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| Keywords: | opto-magnetic properties photoluminescence single-molecule magnets tetrazine ytterbium |
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