Issue 59, 2017, Issue in Progress

Construction of 3D metal–organic frameworks bearing heteropolyoxometalate units and multi-azole molecules and exploration of their photocatalytic activities

Abstract

Taking advantage of multi-azole molecules as organic linkers, two novel 3D metal–organic frameworks consisting of heteropolyoxometalate building blocks, i.e., [Cu5(1,4-ttb)4(CrMo6(OH)6O18)(H2O)8]·10H2O (1) and [Cu4(1,4-ttb)4(SiW12O40)(H2O)8]·4H2O (2) (1,4-ttb = 1-(tetrazo-5-yl)-4-(triazo-1-yl)benzene) have been fabricated and characterized via X-ray single-crystal diffraction, FT-IR spectroscopy, powder X-ray diffraction (PXRD) and TG analyses. Compounds 1 and 2 both possess pillared-layer 3D frameworks which were based on POM units and different Cu–tetrazolate motifs. Compound 1 is a (2,6,6)-connected 3D framework constructed from the 2D networks {Cu5(1,4-ttb)4(H2O)8}n through connected CrMo6 polyoxoanions with (32.42.52.68.8)(34.44.54.63) topology. Compound 2 is a (2,3,5)-connected 3D framework constructed from the 2D wave layers {Cu4(1,4-ttb)4(H2O)8} through connected SiW12 polyoxoanions with (4.82)2(42.64.82.102)(8) topology. Magnetism studies of compound 1 reveal the dominant antiferromagnetic coupling between the Cu(II) ions. The electrochemistry properties of compound 2 were studied. Intriguingly, compounds 1 and 2 display considerable photocatalytic activities for the degradation of several organic dyes.

Graphical abstract: Construction of 3D metal–organic frameworks bearing heteropolyoxometalate units and multi-azole molecules and exploration of their photocatalytic activities

Supplementary files

Article information

Article type
Paper
Submitted
09 May 2017
Accepted
19 Jul 2017
First published
24 Jul 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 36860-36866

Construction of 3D metal–organic frameworks bearing heteropolyoxometalate units and multi-azole molecules and exploration of their photocatalytic activities

C. Gong, X. Zeng, L. Xin, J. Zhang and J. Xie, RSC Adv., 2017, 7, 36860 DOI: 10.1039/C7RA05210C

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