Studies on the Magnetic Ground State of a Spin M\'obius Strip
| Autor: | Newton, Graham N., Hoshino, Norihisa, Matsumoto, Takuto, Shiga, Takuya, Nakano, Motohiro, Nojiri, Hiroyuki, Wernsdorfer, Wolfgang, Furukawa, Yuji, Oshio, Hiroki |
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| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Chem. Eur. J. 22, 14205 (2016) |
| Druh dokumentu: | Working Paper |
| Popis: | 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)$_n$($\alpha$, $\beta$, or $\gamma$-CD)$_2$]$m$H$_2$O (n = 6, 7, or 8), prepared by the reactions of (V=O)SO$_4$$\cdot$$x$H$_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 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. Comment: 8 pages, 8 figures, accepted for publication in Chemistry - A European Journal |
| Databáze: | arXiv |
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