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Issue 17, 2009
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A metamagnetic 2D copper(ii)-azide complex with 1D ferromagnetism and a hysteretic spin-flop transition

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Abstract

Compound [Cu3(N3)6(DMF)2]n (1) was initially obtained in a serendipitous way during efforts to prepare a CuII/N3/Mebta coordination polymer (Mebta = 1-methylbenzotriazole). With the identity of 1 established by single-crystal crystallography, a rational preparative route to this complex was designed and carried out by reacting Cu(ClO4)·6H2O with two equivalents of NaN3 in DMF. Complex 1 is a 2D coordination polymer possessing μ1,1,1 and μ1,1,3azido ligands. Its structure consists of {Cu3(N3)6(DMF2)} repeating units, which form chains that run parallel to the a axis; their bridging is achieved through end-on azides. The chains form sheets parallel to the ab plane through end-to-end azides. The magnetic properties of 1 have been studied in detail. The complex contains 1D ferromagnetic chains, based on a CuII3 repeating unit, which can be viewed as having an S = 3/2 ground state. The ferromagnetic chains undergo antiferromagnetic coupling, which is weak enough to be overcome by moderate magnetic fields at 2 K leading to a metamagnetic spin-flop transition at 2.7 T. The transition is first-order, leading to hysteresis of the order of 0.2 T.

Graphical abstract: A metamagnetic 2D copper(ii)-azide complex with 1D ferromagnetism and a hysteretic spin-flop transition

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Supplementary files

Article information


Submitted
05 Jan 2009
Accepted
10 Mar 2009
First published
31 Mar 2009

Dalton Trans., 2009, 3215-3221
Article type
Paper

A metamagnetic 2D copper(II)-azide complex with 1D ferromagnetism and a hysteretic spin-flop transition

G. Lazari, T. C. Stamatatos, C. P. Raptopoulou, V. Psycharis, M. Pissas, S. P. Perlepes and A. K. Boudalis, Dalton Trans., 2009, 3215
DOI: 10.1039/B823423J

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