Issue 4, 2017

Single-molecule magnetism arising from cobalt(ii) nodes of a crystalline sponge

Abstract

The remarkable Metal–Organic Framework (MOF), {[(Co(NCS)2)33-TPT)4a(H2O)·b(MeOH)}n (1), which is used in the revolutionary crystalline sponge method, displays characteristic Single-Molecule Magnet (SMM) behaviour under applied static fields. We report the subtle effects of changes in the coordination environment of the CoII ions in 1, leading to drastically different magnetic behaviors of two additional related compounds, {[(Co(NCS)2)30–3-TPT)4c(H2O)}n (2) and {[(Co(NCS)2(H2O)0.65(MeOH)0.35)33-TPT)2]·2.4(H2O)}n (3). Magnetic measurements reveal unquenched first order orbital angular momentum, leading to significant magnetic anisotropy in all compounds, which was corroborated through CASSCF-type calculations. Notably, the crystalline sponge is the first example of a 3D network built from CoII Single-Ion Magnets (SIMs) as nodes.

Graphical abstract: Single-molecule magnetism arising from cobalt(ii) nodes of a crystalline sponge

Supplementary files

Article information

Article type
Paper
Submitted
31 Nhl 2016
Accepted
20 N’w 2016
First published
20 N’w 2016

J. Mater. Chem. C, 2017,5, 835-841

Single-molecule magnetism arising from cobalt(II) nodes of a crystalline sponge

G. Brunet, D. A. Safin, J. Jover, E. Ruiz and M. Murugesu, J. Mater. Chem. C, 2017, 5, 835 DOI: 10.1039/C6TC04703C

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