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Issue 37, 2011
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Crystal structures and magnetism of infinite alternating chains arranged by paddle-wheel dinuclear copper and mononuclear copper units

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Abstract

The crystal structures and magnetic properties of two novel polyclusters {[Cu3(tci)2(H2O)2]·12H2O}n (1) and {[Cu3(tci)2(H2O)2]·6H2O}n (2) (tci = tris(2-carboxyethyl) isocyanurate) are investigated. The X-ray crystallographic analysis reveals that they contain interesting infinite alternating chains of dinuclear paddle-wheel copper and mononuclear copper units arranged in ABBA magnetism exchange mode. Variable-temperature magnetic susceptibility measurements on the two polyclusters show strong antiferromagnetism couplings between copper ions with exchange interactions J = −181.4 cm−1, zj′ = −0.31 cm−1 for 1, J = −170 cm−1, zj′ = −0.42 cm−1 for 2. With the aim of studying magneto-structural correlation, we synthesized a three-dimensional polymer [Cu3(tci)2(py)4(H2O)2]n (3) based on isolated dinuclear cluster and mononuclear copper units. Fitting the susceptibility data yielded J = −176.1 cm−1, zj′ = −0.084 cm−1 for 3.

Graphical abstract: Crystal structures and magnetism of infinite alternating chains arranged by paddle-wheel dinuclear copper and mononuclear copper units

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Publication details

The article was received on 03 May 2011, accepted on 06 Jul 2011 and first published on 15 Aug 2011


Article type: Paper
DOI: 10.1039/C1DT10822K
Dalton Trans., 2011,40, 9388-9393

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    Crystal structures and magnetism of infinite alternating chains arranged by paddle-wheel dinuclear copper and mononuclear copper units

    H. Li, H. Yao, E. Zhang, Y. Jia, H. Hou and Y. Fan, Dalton Trans., 2011, 40, 9388
    DOI: 10.1039/C1DT10822K

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