Issue 10, 2011

Two-step synthesis, structure and adsorption property of a dynamic zinc phosphonocarboxylate framework

Abstract

Two zinc phosphonocarboxylate frameworks, Zn1.5(pbc)(2,2′-bpy) (1) (2,2′-bpy = 2,2′-bipyridine) and Zn(pbc)(NH2(CH3)2)0.5·0.5H3O (2), were synthesized in a mixed-solvothermal condition. Their structures have been determined by single-crystal X-ray diffraction analysis, IR spectra and thermogravimetric analysis. Compound 1 is a three-dimensional zinc phosphonocarboxylate with auxiliary ligand of 2,2′-bpy. 2 was obtained by reheating the filtrate of 1 and shows a nanoporous open-framework with zeolitic GIS topology. At room temperature, 2 can absorb organic amine and solvents in its channels, causing a breathing effect and shrinkage of the pores, resulting in single-crystal-to-single-crystal transformation to structure 2a, Zn(pbc)(NH2(CH3)2)·0.5DMF·2H2O. The porosity of 2 was demonstrated by the methanol and water adsorption experiments, indicating selective guest uptake.

Graphical abstract: Two-step synthesis, structure and adsorption property of a dynamic zinc phosphonocarboxylate framework

Supplementary files

Article information

Article type
Paper
Submitted
01 Oct 2010
Accepted
29 Nov 2010
First published
24 Jan 2011

CrystEngComm, 2011,13, 3378-3382

Two-step synthesis, structure and adsorption property of a dynamic zinc phosphonocarboxylate framework

Z. Chen, Y. Ling, H. Yang, Y. Guo, L. Weng and Y. Zhou, CrystEngComm, 2011, 13, 3378 DOI: 10.1039/C0CE00687D

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