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Studies on the Magnetic Ground State of a Spin Möbius Strip
Author(s) -
Newton Graham N.,
Hoshino Norihisa,
Matsumoto Takuto,
Shiga Takuya,
Nakano Motohiro,
Nojiri Hiroyuki,
Wernsdorfer Wolfgang,
Furukawa Yuji,
Oshio Hiroki
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201602439
Subject(s) - antiferromagnetism , ground state , ion , crystallography , vanadium , chemistry , cluster (spacecraft) , degenerate energy levels , spin (aerodynamics) , sodium , inorganic chemistry , physics , condensed matter physics , atomic physics , organic chemistry , quantum mechanics , computer science , thermodynamics , programming language
Here we report the synthesis, structure and detailed characterisation of three n ‐membered oxovanadium rings, Na n [(V=O) n Na n (H 2 O) n (α, β, or γ‐CD) 2 ]⋅ m H 2 O ( n =6, 7, or 8), prepared by the reactions of (V=O)SO 4 ⋅ x H 2 O 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.