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Issue 25, 2018
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Effective photocatalytic and bifunctional electrocatalytic materials based on Keggin arsenomolybdates and different transition metal capped assemblies

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Abstract

Three novel Keggin arsenomolybdates with transition metal modifying caps, (Hbimb)(H2bimb)[AsMoVI8VV4Co2O40] (1), (Hbimb)2(H2bimb)0.5[AsMoVI8VV4Cu2O40]·1.5H2O (2), and [CuI(imi)2][{CuI(imi)2}4{AsMoV6VVI6O40(VIV2O2)}] (3) (bimb = 1,4-bis(imidazol-l-yl)butane; imi = imidazole), were obtained via altering the solution pH and the organic ligands in the reaction system, and were characterized via routine techniques. Compounds 1 and 2 are tetra-vanadium substituted {AsMoVI8VV4O40} clusters capped by two Co2+ or Cu2+ cations at two symmetrical pit positions of two opposite {Mo4O18} tetramers, and these represent the first tetra-vanadium substituted bi-cobalt(II)/copper(II) capped assemblies. The basic unit of compound 3 is one hexa-electron-reduced Keggin polyoxoanion {AsMoV6MoVI6O40} capped by two {VO5} units at the same positions. The adjacent basic units were bonded together via the square binuclear linker {Cu2(imi)4O2} to yield an infinite 1D cap-to-cap chain, which was further aggregated together in A–B–A–B mode via a pair of {Cu(1)(imi)2} linkers, forming an unique 2D layer. Compounds 1–3 show bifunctional electrocatalytic character and effective photocatalytic performance toward the degradation of typical dyes under UV irradiation.

Graphical abstract: Effective photocatalytic and bifunctional electrocatalytic materials based on Keggin arsenomolybdates and different transition metal capped assemblies

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Publication details

The article was received on 08 Apr 2018, accepted on 18 May 2018 and first published on 22 May 2018


Article type: Paper
DOI: 10.1039/C8CE00550H
Citation: CrystEngComm, 2018,20, 3522-3534
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    Effective photocatalytic and bifunctional electrocatalytic materials based on Keggin arsenomolybdates and different transition metal capped assemblies

    F. Li, J. Lv, K. Yu, M. Zhang, K. Wang, F. Meng and B. Zhou, CrystEngComm, 2018, 20, 3522
    DOI: 10.1039/C8CE00550H

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