Lookup NU author(s): Samira Hribesh,
Dr Miguel Galindo-Cuesta,
Dr Andrew Pike,
Professor Andrew Houlton,
Professor Felix Zamora
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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.
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
Print publication date: 18/04/2013
ISSN (print): 0020-1669
ISSN (electronic): 1520-510X
Publisher: American Chemical Society
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