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Assembly of Six [HxAs2Mo6O26](6-x)- Clusters-Based Hybrid Materials from 1D Chain to 3D Framework with Multiple Cu-N Complexes


A series of organic-inorganic hybrid compounds, formulated as, [{Cu(4,4'-bipy)1.5(H2O)2}2{H2As2Mo6O26}] (1), [{Cu (biim)2}2{HAs2Mo6O26}{Cu(biim)Cl}]•H2O (2), (H2bib)[{Cu(H2O)2(bib)}{H2As2Mo6O26}]•2H2O (3), [{(Hbix)Cu(bix)0.5}2{As2Mo6O26}]•2H2O (4), [{Cu(bmb)1.5(H2O)}2{H2As2Mo6O26}]•2H2O (5), and [{Cu2(bth)4}{H2As2Mo6O26}]•H2O (6) (4,4'-bipy=4,4'-Bipyridine; biim=Biimidazole; bib=1,4-Bis(1-imidazolyl)benzene; bix=1,4-Bis(imidazol-1-ylmethyl)benzene; bmb=1,4-Bis(benzimidazol-1-yl)benzene; bth=1,6-Bis(1,2,4-triazol-lyl)hexane) have been hydro-thermally synthesized and structurally characterized by the elemental analysis, TG, IR, XPS, XRD, and single-crystal X-ray diffraction. The crystal structures 1-6 are formed by the metal-organic complexes and [HxAs2Mo6O26](6-x)- cluster. Compounds 1-2 feature infinite 1D-chain structures. Compounds 3-5 form 2D-layer structures that Cu cations take five-, six-coordinate with polyoxoanions and organic ligands. Notably, compound 6 introduces POM sytems into metal-organic frameworks (MOFs) to form a unique POMOF {42•611•82}{42•64}{44•69•7•8} topological structure. The coordination modes of [HxAs2Mo6O26](6-x)- cluster in compounds 2, 5 and 6 are reported for the first time. The photocatalytic properties of 1-6 have been studied for decomposition of methylene blue (MB) under UV light. In addition, all compounds exhibit good electrocatalytic performance for the reduction of nitrite.

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Publication details

The article was received on 15 Feb 2017, accepted on 13 Apr 2017 and first published on 13 Apr 2017

Article type: Paper
DOI: 10.1039/C7CE00319F
Citation: CrystEngComm, 2017, Accepted Manuscript
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    Assembly of Six [HxAs2Mo6O26](6-x)- Clusters-Based Hybrid Materials from 1D Chain to 3D Framework with Multiple Cu-N Complexes

    B. Cong, Z. Su, Z. Zhao, B. yu, W. Zhao, L. Xia, X. ma and B. Zhou, CrystEngComm, 2017, Accepted Manuscript , DOI: 10.1039/C7CE00319F

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