Issue 73, 2002

The flexibility of molecular components as a suitable tool in designing extended magnetic systems

Abstract

In this work we show how the design of n-dimensional magnetic compounds (nD with n = 1–3) can strongly benefit from the use crystal engineering techniques, which can give rive to structures of different shapes with different properties. We focus on the networks built by assembling the malonato-bridged tetranuclear copper(II) units Cu4(mal)4 (mal2− is the dianion of propanedioic acid, H2mal) through the potentially bridging 2,4′-bipyridine (2,4′-bpy), 4,4′-bipyridine (4,4′-bpy) and pyrazine (pyz). The magneto-structural study of the complexes of formula [Cu4(mal)4(2,4′-bpy)4(H2O)4]·8H2O (1), [Cu4(mal)4(H2O)4(4,4′-bpy)2] (2) (this compound was the subject of a previous report but it is included here for comparison) and [Cu4(mal)4(pyz)2]·4H2O (3) reveals that the ferromagnetically coupled Cu4(mal)4 unit which occurs in 13 is propagated into two- (2) and three-dimensions (3) by using 4,4′-bpy and pyz as linkers, respectively. Whereas in the case of complex 1, this tetranuclear unit is magnetically isolated, significant antiferromagnetic interactions between these units mediated by the bridges 4,4′-bpy and pyz occur in 2 and 3.

Article information

Article type
Paper
Submitted
09 Apr 2002
Accepted
21 May 2002
First published
19 Jul 2002

CrystEngComm, 2002,4, 440-446

The flexibility of molecular components as a suitable tool in designing extended magnetic systems

Y. Rodríguez-Martín, M. Hernández-Molina, F. S. Delgado, J. Pasán, C. Ruiz-Pérez, J. Sanchiz, F. Lloret and M. Julve, CrystEngComm, 2002, 4, 440 DOI: 10.1039/B203506P

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