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Published on: April 22, 2016
Polyoxometalate-Based Metal-Organic Frameworks as Visible-Light-Induced Photocatalysts
Xiuxia Zhao1, Shaowei Zhang1,2, Junqing Yan1
1College of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (MOE) , Nankai University , Tianjin , 300071 , China.
Abstract:
Two stable 3D polyoxometalate-based metal-organic frameworks (PMOFs), [CuI12(trz)8(H2O)2][α-SiW12O40]·2H2O (1) and [CuI12(trz)8Cl][α-PW12O40] (2) (Htrz = 1- H-1,2,4-triazole) based on Keggin-type POMs were successfully obtained and fully characterized. The basic building units of the two PMOFs are [CuI12(trz)8], but polyoxoanion (POA) template effect leads to different structures and properties: 1 represents an interesting example that [α-SiW12O40]4- locate in the nine-membered Cu-trz rings through Cu···O weak interactions to form a 3D framework, whereas 2 shows a 3D structure constructed from 2D bilayer cationic network [CuI12(trz)8Cl]3+ and [α-PW12O40]3- lying in the adjacent layers via Cu···O weak interactions. PMOF 1 as unusual visible-light photocatalyst exhibit significantly enhanced photocatalytic activity under visible-light and excellent stability during the photocatalysis process for recovering and recycling, as well as photocatalytic hydrogen evolution activity.
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