A new family of octanuclear Cu4Ln4 (Ln = Gd, Tb and Dy) spin clusters

Kerwyn G. Alley; Arindam Mukherjee; Rodolphe Clérac; Colette Boskovic

doi:10.1039/B710755B

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A new family of octanuclear Cu₄Ln₄ (Ln = Gd, Tb and Dy) spin clusters†‡

Kerwyn G. Alley,^a Arindam Mukherjee,^a Rodolphe Clérac^b and Colette Boskovic*^a

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* Corresponding authors

^a School of Chemistry, University of Melbourne, Victoria, Australia
E-mail: c.boskovic@unimelb.edu.au

^b Université Bordeaux 1; CNRS, Centre de Recherche Paul Pascal, CRPP UPR-8641, 115, Avenue du Dr A. Schweitzer, 33600 Pessac, France

Abstract

The reaction of Cu(OAc)₂ and Ln(OAc)₃ (Ln = Gd, Tb and Dy) with 2-amino-2-methyl-1,3-propanediol (ampdH₂) under solvothermal conditions has afforded a new family of isostructural octanuclear Cu₄Ln₄ complexes with the formula [Cu₄Ln₄(OAc)₁₂(ampdH)₈(OH₂)₂] (Ln = Gd (1), Tb (2) and Dy(3)) in good yield. Variable temperature magnetic susceptibility measurements reveal weak intramolecular exchange interactions for 1 and 2. Ferromagnetic coupling is observed for 1 and attributed to Cu⋯Gd interactions. In contrast, the magnetic susceptibility behaviour of 2 arises from a combination of intramolecular exchange interactions and the crystal field splitting of the ⁷F₆ ground state of the Tb^III ions.

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Article information

DOI: https://doi.org/10.1039/B710755B
Article type: Paper
Submitted: 01 Aug 2007
Accepted: 28 Sep 2007
First published: 18 Oct 2007

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Dalton Trans., 2008, 59-63

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A new family of octanuclear Cu₄Ln₄ (Ln = Gd, Tb and Dy) spin clusters

K. G. Alley, A. Mukherjee, R. Clérac and C. Boskovic, Dalton Trans., 2008, 59 DOI: 10.1039/B710755B

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Dalton Transactions