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Studies on the Magnetic Ground State of a Spin Mobius Strip

TitleStudies on the Magnetic Ground State of a Spin Mobius Strip
Publication TypeJournal Article
Year of Publication2016
AuthorsNewton, GN, Hoshino, N, Matsumoto, T, Shiga, T, Nakano, M, Nojiri, H, Wernsdorfer, W, Furukawa, Y, Oshio, H
JournalChemistry-a European Journal
Date Published09
Type of ArticleArticle
ISBN Number0947-6539
Accession NumberWOS:000384698200017
Keywordschemistry, cluster compounds, complexes, cyclodextrins, epr, identification, liquid-crystals, macrocyclic ligands, Magnetic, metal, properties, rings, single-molecule magnets, transition, Vanadium, weak ferromagnetism, wheels

Here we report the synthesis, structure and detailed characterisation of three n-membered oxovanadium rings, Na-n[(V=O)(n)Na-n(H2O)(n)(alpha,beta, or gamma-CD)(2)]center dot mH(2)O (n = 6, 7, or 8), prepared by the reactions of (V=O)SO4 center dot xH(2)O with alpha, beta, or gamma-cyclodextrins (CDs) and NaOH in water. Their alternating heterometallic vanadium/sodium cyclic core structures were sandwiched between two CD moieties such that O-Na-O groups separated the neighbouring vanadyl ions. Antiferromagnetic interactions between the S = 1/2 vanadyl ions led to S = 0 ground states for the even-membered rings, but to two quasi-degenerate S = 1/2 states for the spin-frustrated heptanuclear cluster.

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Complex States

Short TitleChem.-Eur. J.
Alternate JournalChem.-Eur. J.