Metal-organic anion receptors: arranging urea hydrogen-bond donors to encapsulate sulfate ions
Metal-organic anion receptors: arranging urea hydrogen-bond donors to encapsulate sulfate ions
A new class of synthetic receptors for anions can be prepared by arranging urea hydrogen-bond donor groups on a simple metal-organic scaffold. The complex cation [PtL4]2+ (L = 8-(n-butylurea)iso-quinoline) can adopt four conformations reminiscent of calix[4]arene-based receptors; "cone", "partial cone", "1,2-alternate", or "1,3-alternate". 1H NMR solution data and solid-state X-ray structures show that a "1,2-alternate" conformation is used to bind spherical halide ions while a "cone" conformation is involved in strong binding with the tetrahedral oxy-anions such as the sulfate ion; even in a strongly competitive solvent such as DMSO.
anion binding, sulfate, supramolecular chemistry, molecular recognition
5030-5031
Bondy, Chantelle R.
42e08031-2cdb-4df8-82bb-f435efac2ef7
Gale, Philip A.
c840b7e9-6847-4843-91af-fa0f8563d943
Loeb, Stephen J.
66849bb2-caf8-4dd0-9710-0785f114ca8f
30 March 2004
Bondy, Chantelle R.
42e08031-2cdb-4df8-82bb-f435efac2ef7
Gale, Philip A.
c840b7e9-6847-4843-91af-fa0f8563d943
Loeb, Stephen J.
66849bb2-caf8-4dd0-9710-0785f114ca8f
Bondy, Chantelle R., Gale, Philip A. and Loeb, Stephen J.
(2004)
Metal-organic anion receptors: arranging urea hydrogen-bond donors to encapsulate sulfate ions.
Journal of the American Chemical Society, 126, .
(doi:10.1021/ja039712q).
Abstract
A new class of synthetic receptors for anions can be prepared by arranging urea hydrogen-bond donor groups on a simple metal-organic scaffold. The complex cation [PtL4]2+ (L = 8-(n-butylurea)iso-quinoline) can adopt four conformations reminiscent of calix[4]arene-based receptors; "cone", "partial cone", "1,2-alternate", or "1,3-alternate". 1H NMR solution data and solid-state X-ray structures show that a "1,2-alternate" conformation is used to bind spherical halide ions while a "cone" conformation is involved in strong binding with the tetrahedral oxy-anions such as the sulfate ion; even in a strongly competitive solvent such as DMSO.
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More information
Submitted date: 20 November 2003
Published date: 30 March 2004
Additional Information:
This article was featured in Science (Editor's Choice) 2004, 304, 361 "Snapping up sulfate"
Keywords:
anion binding, sulfate, supramolecular chemistry, molecular recognition
Identifiers
Local EPrints ID: 13500
URI: http://eprints.soton.ac.uk/id/eprint/13500
ISSN: 0002-7863
PURE UUID: 0136a452-5d47-4dea-8514-bdce9cf8dbf5
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Date deposited: 14 Dec 2004
Last modified: 16 Mar 2024 03:15
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Contributors
Author:
Chantelle R. Bondy
Author:
Philip A. Gale
Author:
Stephen J. Loeb
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