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Issue 21, 2014
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Recyclable chemosensor for oxalate based on bimetallic complexes of a dinucleating bis(iminopyridine) ligand

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Abstract

Herein we describe bimetallic di-nickel and di-copper complexes [Ni2(L)Br4] (1) and [Cu2(L)Br4(NCMe)2] (2) (L = (1E,1′E)-N,N′-(1,4-phenylenebis(methylene))bis(1-(6-(2,4,6-triisopropylphenyl)pyridin-2-yl)methanimine)) that bind oxalate intramolecularly to form [Ni2(L)Br2(C2O4)(NCMe)] (3) and [Cu2(L)Br2(C2O4)] (4). For the di-nickel complex 1, oxalate incorporation is accompanied by a significant colour change, from red-pink (1) to deep green (3). Mass spectrometric experiments demonstrate that the compound 1 is selective for oxalate versus related mono- and di-carboxylates tested. Oxalate can be released by the addition of slight excess of calcium bromide that forms insoluble calcium oxalate and restores the original Ni2(L)Br4 species. The product of the oxalate release was crystallized as [Ni2(L)Br4]·CaBr2(THF)4 species.

Graphical abstract: Recyclable chemosensor for oxalate based on bimetallic complexes of a dinucleating bis(iminopyridine) ligand

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Publication details

The article was received on 24 Feb 2014, accepted on 01 Apr 2014 and first published on 01 Apr 2014


Article type: Paper
DOI: 10.1039/C4DT00577E
Author version available: Download Author version (PDF)
Citation: Dalton Trans., 2014,43, 7979-7986
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    Recyclable chemosensor for oxalate based on bimetallic complexes of a dinucleating bis(iminopyridine) ligand

    J. W. Beattie, D. S. White, A. Bheemaraju, P. D. Martin and S. Groysman, Dalton Trans., 2014, 43, 7979
    DOI: 10.1039/C4DT00577E

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