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Redox- and solvato-magnetic switching in a tetrathiafulvalene-based triad single-molecule magnet

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Abstract

The first simultaneous redox and solvato-magnetic switching was achieved. The dinuclear complex [Dy2(hfac)6(H2SQ)]·CH2Cl2 (Dy2H2SQ) (where hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate and H2SQ = 2,2′-benzene-1,4-diylbis(6-hydroxy-4,7-di-tert-butyl-1,3-benzodithiol-2-ylium-5-olate) was reversibly oxidized into the dinuclear complex [Dy2(hfac)6(H2O)2(Q)] (Dy2Q) (where Q = 2,2′-cyclohexa-2,5-diene-1,4-diylidenebis(4,7-di-tert-butyl-1,3-benzodithiole-5,6-dione)) inducing the reversible coordination of water molecules to the DyIII ion. Magnetic susceptibility measurements and ab initio CASSCF/SI-SO calculations, confirmed by Cantilever Torque Magnetometry measurements, demonstrated that Dy2H2SQ is a Single-Molecule Magnet with a magnetic relaxation 7000 times slower than Dy2Q (at 3 K) allowing a “ON–OFF” switching of the magnetic bistability.

Graphical abstract: Redox- and solvato-magnetic switching in a tetrathiafulvalene-based triad single-molecule magnet

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Supplementary files

Article information


Submitted
17 Mar 2020
Accepted
24 Apr 2020
First published
27 Apr 2020

Inorg. Chem. Front., 2020, Advance Article
Article type
Research Article

Redox- and solvato-magnetic switching in a tetrathiafulvalene-based triad single-molecule magnet

F. Pointillart, J. Flores Gonzalez, V. Montigaud, L. Tesi, V. Cherkasov, B. Le Guennic, O. Cador, L. Ouahab, R. Sessoli and V. Kuropatov, Inorg. Chem. Front., 2020, Advance Article , DOI: 10.1039/D0QI00319K

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