Decoding the role of encapsulated ions in the electronic and magnetic properties of mixed-valence polyoxovanadate capsules {X@V22O54} (X = ClO4−, SCN−, VO2F2−): a combined theoretical approach
文献情報
Almudena Notario-Estévez, Piotr Kozłowski, Oliver Linnenberg, Xavier López, Kirill Yu. Monakhov
The electronic structure and magnetism of mixed-valence, host–guest polyoxovanadates {X@VIV/V22O54} with diamagnetic (X =) ClO4− (Td, 1) and SCN− (C∞v, 2) template anions are assessed by means of two theoretical methods: density functional theory and effective Hamiltonian calculations. The results are compared to those obtained for another member of this family with X = VO2F2− (C2v, 3) (see P. Kozłowski et al., Phys. Chem. Chem. Phys., 2017, 19, 29767–29771), for which complementary data are also acquired. It is demonstrated that the X guest anions strongly influence the electronic and magnetic properties of the system, leading to various valence states of vanadium and modifying V–O–V exchange interactions. Our findings are concordant with and elucidate the available experimental data (see K. Y. Monakhov et al., Chem. – Eur. J., 2015, 21, 2387–2397).
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