Studies on the Magnetic Ground State of a Spin Möbius Strip.
作者： Graham N. Newton , Norihisa Hoshino , Takuto Matsumoto , Takuya Shiga , Motohiro Nakano
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摘要: 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]⋅mH2O (n = 6, 7, 8), prepared by reactions (V=O)SO4⋅xH2O with α, γ-cyclodextrins(CDs) NaOH in water. Their alternating heterometallic vanadium/sodium cyclic core structures were sandwiched between two CD moieties such that O-Na-O groups separated neighbouring vanadyl ions. Antiferromagnetic interactions S ½ ions led to 0 ground states for even-membered but quasi-degenerate spin-frustrated heptanuclear cluster.
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