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Issue 40, 2011
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Site specific Co(III) sarcophagine binding in multi-component phosphonium and p-sulfonatocalix[4]arene systems

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Abstract

Co(III) sarcophagine-type cage molecules, [Co(diCLsar)]3+ or [Co(HONOsar)]3+, form either 1 : 1 or 1 : 2 host–guest inclusion complexes with mono-phosphonium cations and sodium p-sulfonatocalix[4]arene in the solid state yielding complex I [p-sulfonatocalix[4]arene·Co(diCLsar)·2{benzyltriphenylphosphonium}], complex II [2{p-sulfonatocalix[4]arene}·Co(diCLsar)·3{tetraphenylphosphonium}] and complex III [p-sulfonatocalix[4]arene·Co(HONOsar)·tetraphenylphosphonium]. The diversity of the structural types of these multi-component systems, including the orientation of the Co(III) molecules in the cavities of the calixarenes, depends on the nature of their terminal functional groups. The secondary coordination interactions binding between the Co(III) molecules and p-sulfonatocalix[4]arene have also been investigated in water using NMR techniques.

Graphical abstract: Site specific Co(iii) sarcophagine binding in multi-component phosphonium and p-sulfonatocalix[4]arene systems

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Publication details

The article was received on 01 Apr 2011, accepted on 08 Jun 2011 and first published on 21 Jul 2011


Article type: Paper
DOI: 10.1039/C1DT10550G
Dalton Trans., 2011,40, 10337-10344

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    Site specific Co(III) sarcophagine binding in multi-component phosphonium and p-sulfonatocalix[4]arene systems

    I. Ling, Y. Alias, A. N. Sobolev, B. W. Skelton and C. L. Raston, Dalton Trans., 2011, 40, 10337
    DOI: 10.1039/C1DT10550G

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