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Coordination Chemistry of 6-Thioguanine Derivatives with Cobalt: Toward Formation of Electrical Conductive One-Dimensional Coordination Polymers

Lookup NU author(s): Samira Hribesh, Dr Miguel Galindo-Cuesta, Dr Andrew Pike, Professor Andrew Houlton, Professor Felix Zamora

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Abstract

In this work we have synthetized and characterized by X-ray diffraction five cobalt complexes with 6-thioguanine (6-ThioGH), 6-thioguanosine (6-ThioGuoH), or 2′-deoxy-6-thioguanosine (2′-d-6-ThioGuoH) ligands. In all cases, these ligands coordinate to cobalt via N7 and S6 forming a chelate ring. However, independently of reagents ratio, 6-ThioGH provided monodimensional cobalt(II) coordination polymers, in which the 6-ThioG– acts as bridging ligand. However, for 2′-d-6-ThioGuoH and 6-ThioGuoH, the structure directing effect of the sugar residue gives rise to mononuclear cobalt complexes which form extensive H-bond interactions to generate 3D supramolecular networks. Furthermore, with 2′-d-6-ThioGuoH the cobalt ion remains in the divalent state, whereas with 6-ThioGuoH oxidation occurs and Co(III) is found. The electrical and magnetic properties of the coordination polymers isolated have been studied and the results discussed with the aid of DFT calculations, in the context of molecular wires.


Publication metadata

Author(s): Amo-Ochoa P, Alexandre SS, Hribesh S, Galindo MA, Castillo O, Gómez-García CJ, Pike AR, Soler JM, Houlton A, Zamora F

Publication type: Article

Publication status: Published

Journal: Inorganic Chemistry

Year: 2013

Volume: 52

Issue: 9

Pages: 5290-5299

Print publication date: 18/04/2013

ISSN (print): 0020-1669

ISSN (electronic): 1520-510X

Publisher: American Chemical Society

URL: http://dx.doi.org/10.1021/ic400237h

DOI: 10.1021/ic400237h


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