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Issue 4, 2006
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[Ln(terpy)]3+ (Ln = Sm, Gd) entity forms isolated magnetic chains with [W(CN)8]3−

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Abstract

The reaction between Ln(NO3)3·xH2O, Cs3[WV(CN)8]·H2O and 2,2′:6′,2″-terpyridine (terpy) leads to the original isomorphous cyano-bridged [LnIII(terpy)(DMF)4][WV(CN)8]·6H2O [Ln = Gd (1), Sm (2)] 1-D chains. The crystal structures of {LnIIIWV} chains 1 and 2 consist of alternating {[W(CN)8]} and {[Ln(terpy)]} building blocks. The neighbouring 1-D chains are weakly linked through π–π stacking interactions of the aromatic rings leading to 2-D supramolecular layers. The layers are linked through hydrogen bonds between H2O molecules and terminal cyano ligands. Magnetic studies revealed a weak antiferromagnetic coupling (J = −2.3(2) K) within the {GdIIIWV} chains in 1. The positive effective coupling constant J = +2.0(5) K between the total angular momentum of the Sm(III) centre and the spin of the W(V) ion is equivalent to an antiferromagnetic character of the spin coupling between both centres in the {SmIIIWV} chains of 2. The magnetic measurements suggest that they display an isolated magnetic chain behaviour.

Graphical abstract: [Ln(terpy)]3+ (Ln = Sm, Gd) entity forms isolated magnetic chains with [W(CN)8]3−

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Publication details

The article was received on 18 Aug 2005, accepted on 13 Oct 2005 and first published on 03 Nov 2005


Article type: Paper
DOI: 10.1039/B511788G
Citation: Dalton Trans., 2006,0, 625-628
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    [Ln(terpy)]3+ (Ln = Sm, Gd) entity forms isolated magnetic chains with [W(CN)8]3−

    P. Przychodzeń, K. Lewiński, R. Pełka, M. Bałanda, K. Tomala and B. Sieklucka, Dalton Trans., 2006, 0, 625
    DOI: 10.1039/B511788G

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