Studies on the Magnetic Ground State of a Spin Möbius Strip |
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| Authors: | Dr. Graham N. Newton Dr. Norihisa Hoshino Dr. Takuto Matsumoto Dr. Takuya Shiga Prof. Motohiro Nakano Prof. Hiroyuki Nojiri Prof. Wolfgang Wernsdorfer Prof. Yuji Furukawa Prof. Hiroki Oshio |
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| Affiliation: | 1. Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan;2. School of Chemistry, University of Nottingham, Nottingham, UK;3. Research Center for Structural Thermodynamics, Graduate School of Science, Osaka University, Toyonaka, Osaka, Japan;4. Institute of Materials Research, Tohoku University, Aoba-ku, Sendai, Japan;5. CNRS, Institut NEEL, Univ. Grenoble Alpes, Grenoble, France;6. Ames Laboratory and, Department of Physics and Astronomy, Iowa State University, Ames, IA, USA |
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| Abstract: | Here we report the synthesis, structure and detailed characterisation of three n‐membered oxovanadium rings, Nan[(V=O)nNan(H2O)n(α, β, or γ‐CD)2]?m H2O (n=6, 7, or 8), prepared by the reactions of (V=O)SO4?x H2O with α, β, or γ‐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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| Keywords: | cluster compounds cyclodextrins macrocyclic ligands magnetic properties vanadium |
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