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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
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
0002-7863
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
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, 5030-5031. (doi:10.1021/ja039712q).

Record type: Article

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: https://eprints.soton.ac.uk/id/eprint/13500
ISSN: 0002-7863
PURE UUID: 0136a452-5d47-4dea-8514-bdce9cf8dbf5
ORCID for Philip A. Gale: ORCID iD orcid.org/0000-0001-9751-4910

Catalogue record

Date deposited: 14 Dec 2004
Last modified: 06 Jun 2018 12:51

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Contributors

Author: Chantelle R. Bondy
Author: Philip A. Gale ORCID iD
Author: Stephen J. Loeb

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