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Issue 31, 2013
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The syntheses, structures and properties of three new lanthanoid thioarsenates: the only example of thioarsenate acting as a ligand to a lanthanide complex

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Abstract

Three new lanthanoid thioarsenates [Eu(en)32-AsS4)] (1, en = ethylenediamine), [Er(teta)(en)(η2-AsS4)] (2, teta = triethylenetetramine) and [La2(tepa)2(μ-η13-AsS3)2] (3, tepa = tetraethylenepentamine) have been solvothermally synthesized and structurally characterized. In compounds 1and 2, the tetrathioarsenate [AsS4]3− anions act as η2-AsS4 chelating ligands to the lanthanide complexes [Eu(en)3]3+/[Er(teta)(en)]3+, leading to neutral molecules [Eu(en)32-AsS4)]/[Er(teta)(en)(η2-AsS4)], whereas the [AsS3]3− anion in compound 3 acts as a μ-η13-AsS3 tetradentate bridging ligand to link [La(tepa)]3+ ions into neutral centrosymmetric [La2(tepa)2(μ-η13-AsS3)2] moieties, where a new coordination mode of μ-η13-AsS3 is observed for the [AsS3]3− ligand. Compounds 1–3 are the only examples of solvothermally synthesized thioarsenates where the [AsS4]3−/[AsS3]3− anions act as ligands in the lanthanide complex. Compound 1 exhibits a fluorescence emission at room temperature. Density functional theory calculations for compounds 2 and 3 also have been performed, and the absorption edges of compounds 1–3 have been investigated by UV-vis spectroscopy.

Graphical abstract: The syntheses, structures and properties of three new lanthanoid thioarsenates: the only example of thioarsenate acting as a ligand to a lanthanide complex

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Publication details

The article was received on 01 Apr 2013, accepted on 29 May 2013 and first published on 30 May 2013


Article type: Paper
DOI: 10.1039/C3DT50858G
Citation: Dalton Trans., 2013,42, 11155-11162
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    The syntheses, structures and properties of three new lanthanoid thioarsenates: the only example of thioarsenate acting as a ligand to a lanthanide complex

    J. Zhou, X. Liu, R. Li, L. An, F. Hu, R. Chen and Y. Wei, Dalton Trans., 2013, 42, 11155
    DOI: 10.1039/C3DT50858G

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