Issue 47, 2013

Two three-dimensional porous frameworks built from metal–organic coordination polymer sheets pillared by polyoxometalate clusters

Abstract

Two new porous frameworks [Ni(bix)2][VW12O40]·(H2bix)·H2O (1) and [Co(bix)2][VW12O40]·(H2bix)·2H2O (2) (bix = 1,4-bis(imidazol-1-ylmethyl)-benzene) composed of Keggin polyoxometalates (POMs) and metal–organic coordination polymer sheets have been successfully obtained, and characterized by elemental analysis, IR spectra, thermal gravimetric analysis, and single crystal X-ray diffraction. Structural analysis reveals that the 2D metal–organic coordination polymer sheets in the two compounds are constructed from the transition-metal (TM) cations and the flexible N-donor ligand bix, which are further pillared by POM clusters into the 3D porous frameworks. Powder X-ray diffraction (PXRD) patterns of 1 indicate the structural integrity of the framework in aqueous solution with a wide pH range of 1 to 11, and in common organic solvents (methanol, ethanol and DMF). Photocatalytic studies indicate that compounds 1 and 2 are not only active photocatalysts for degradation of rhodamine B (RB), but very stable and easily separated from the photocatalytic system for reuse as well.

Graphical abstract: Two three-dimensional porous frameworks built from metal–organic coordination polymer sheets pillared by polyoxometalate clusters

Supplementary files

Article information

Article type
Paper
Submitted
27 Jun 2013
Accepted
09 Sep 2013
First published
10 Sep 2013

Dalton Trans., 2013,42, 16602-16607

Two three-dimensional porous frameworks built from metal–organic coordination polymer sheets pillared by polyoxometalate clusters

Q. Lan, J. Zhang, Z. Zhang, Y. Lu and E. Wang, Dalton Trans., 2013, 42, 16602 DOI: 10.1039/C3DT51722E

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