Metal-ion recognition: Selective interaction of silver(I) with tri-linked N2S2 donor macrocycles and their single ring analogues

Chartres, Jy D., Groth, Andrew M., Lindoy, Leonard F., and Meehan, George V. (2002) Metal-ion recognition: Selective interaction of silver(I) with tri-linked N2S2 donor macrocycles and their single ring analogues. Dalton Transactions, 2002. pp. 371-376.

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Abstract

The interaction of four tri-linked N2S2-donor macrocyclic ligands and their single ring analogues with silver(I) has been investigated. The 3 1 (metal ligand) stoichiometries of the silver(I) complexes of the tri-linked species in dimethyl sulfoxide-d6/CDCl3 were confirmed by means of NMR titrations involving the incremental addition of silver(I) nitrate to the respective ligands in the above solvent mixture and following the corresponding induced shifts in the 1H NMR spectrum. Solid 3 1 (metal ligand) complexes were isolated for each of the parent (unsubstituted) tri-linked ligands. Competitive solvent extraction experiments (water/chloroform) and related bulk membrane transport (water/chloroform/water) experiments have been performed in which each of the four tri-linked ligands as well as their single ring analogues were employed as the extractant/ionophore in the chloroform phase. In both sets of experiments the respective aqueous source phases (buffered at pH 4.9) contained an equimolar mixture of cobalt(II), nickel(II), copper(II), zinc(II), cadmium(II), silver(I) and lead(II) nitrates. For membrane transport the aqueous receiving phase was buffered at pH 3. Under the conditions employed, both the solvent extraction and the bulk membrane transport experiments resulted in high extraction/transport selectivity for silver(I) relative to the other six metal ions present.

Item ID: 4417
Item Type: Article (Research - C1)
ISSN: 1477-9234
Keywords: inorganic chemistry; organic chemistry
Date Deposited: 12 Jun 2009 05:48
FoR Codes: 03 CHEMICAL SCIENCES > 0302 Inorganic Chemistry > 030207 Transition Metal Chemistry @ 33%
03 CHEMICAL SCIENCES > 0305 Organic Chemistry > 030503 Organic Chemical Synthesis @ 34%
03 CHEMICAL SCIENCES > 0303 Macromolecular and Materials Chemistry > 030302 Nanochemistry and Supramolecular Chemistry @ 33%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970103 Expanding Knowledge in the Chemical Sciences @ 100%
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