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Two extended Wells–Dawson arsenomolybdate architectures directed by Na(I) and/or Cu(I) organic complex linkers

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Two extended Wells–Dawson arsenomolybdates, (imi)2[{CuI(imi)2}2{Na(imi)2}{AsIIIAs2VMo18O62}]·2H2O (1) and {CuI0.5(trz)}6 [{CuI0.5(trz)}6(As2Mo18O62)] (2), (imi = iminazole; trz = 1,2,3-triazole), are hydrothermally synthesized and extensively characterized. Compounds 1 and 2 contain a fully oxidized Dawson {As2Mo18O62}6− (abbreviated as {As2Mo18}) anion as the parent cluster unit. Compound 1 is a symmetric mono-arsenate capped anion cluster modified by two half occupancy {AsO3} units, which represents a new capping mode for Dawson clusters. The two adjacent mono-arsenate capped structures are linked by two {Na(imi)2} bridges to form a dimeric cluster, which, as a tetra-dentate ligand, further connects with adjacent dimers by four {Cu(imi)2} linkers to form an infinite ladder shaped chain. In compound 2, each classical Dawson cluster links six adjacent analogs by six {Cu0.5(trz)2} fragments forming an unprecedented 3D network via a unique belt-to-belt staggered pattern. This structure can be simplified as a 2,6-connected 3-D framework with {812·123}{8}3 topology. Compounds 1 and 2 represent the first 1-D and 3-D assemblies of Dawson-type arsenomolybdates, respectively. They display unique electrocatalytic behavior for the oxidation of ascorbic acid (AA) and reduction of NO2 as well as good photocatalytic properties for the degradation of the difficult-to-degrade dye AP under UV light.

Graphical abstract: Two extended Wells–Dawson arsenomolybdate architectures directed by Na(i) and/or Cu(i) organic complex linkers

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The article was received on 11 Dec 2016, accepted on 21 Mar 2017 and first published on 21 Mar 2017

Article type: Paper
DOI: 10.1039/C6CE02539K
Citation: CrystEngComm, 2017, Advance Article
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    Two extended Wells–Dawson arsenomolybdate architectures directed by Na(I) and/or Cu(I) organic complex linkers

    F. Li, J. Lv, K. Yu, H. Zhang, C. Wang, C. Wang and B. Zhou, CrystEngComm, 2017, Advance Article , DOI: 10.1039/C6CE02539K

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