Heterospin complex showing spin transition at room temperature

Novel binuclear [Cu(hfac)2LMe]2, [Cu(hfac)2LMe-CP]2 and chain polymer {[[Cu(hfac)2]2LMe2][Cu(hfac)2]}∞ heterospin complexes revealed spin-crossover-like phenomenon. [Display omitted] New nitronyl nitroxides LMe and LMe-CP containing a 4-methylpyridin-3-yl substituent were synthesized. It was found t...

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Bibliographic Details
Published in:Polyhedron 2015-11, Vol.100, p.132-138
Main Authors: Tolstikov, S.E., Artiukhova, N.A., Romanenko, G.V., Bogomyakov, A.S., Zueva, E.M., Barskaya, I.Yu, Fedin, M.V., Maryunina, K.Yu, Tretyakov, E.V., Sagdeev, R.Z., Ovcharenko, V.I.
Format: Article
Language:English
Subjects:
Cu(II) complexes
Magnetostructural correlations
Nitroxides
Phase transitions
Spin crossover
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Summary:Novel binuclear [Cu(hfac)2LMe]2, [Cu(hfac)2LMe-CP]2 and chain polymer {[[Cu(hfac)2]2LMe2][Cu(hfac)2]}∞ heterospin complexes revealed spin-crossover-like phenomenon. [Display omitted] New nitronyl nitroxides LMe and LMe-CP containing a 4-methylpyridin-3-yl substituent were synthesized. It was found that the interaction of Сu(hfac)2 with LMe and LMe-CP gave binuclear [Cu(hfac)2LMe]2 and [Cu(hfac)2LMe-CP]2·Solv (Solv=n-C6H14, n-C10H22, n-C16H34) and chain polymer {[[Cu(hfac)2]2LMe2][Cu(hfac)2]}∞ heterospin complexes. An important structural peculiarity of LMe and LMe-CP is a large dihedral angle between the planes of the O–N−CN→O paramagnetic fragment and the pyridine ring: 55.2 and 56.1°, respectively. The presence of a methyl group in the pyridine ring of the nitroxide molecule in {[[Cu(hfac)2]2LMe2][Cu(hfac)2]}∞ proved favorable for spin transition at nearly room temperature.
ISSN:0277-5387
DOI:10.1016/j.poly.2015.07.029