Issue 23, 2016

Two- and three-dimensional Zn(ii) coordination polymers constructed from mixed ligand systems: interpenetration, structural transformation and sensing behavior

Abstract

Four Zn(II) coordination compounds (1–4) were prepared solvothermally by reacting Zn2+ ions and organic linkers of dim and carboxylic acid-based ligands. Two-dimensional structures (1 and 2), which are extended to three-dimensional frameworks with the assistance of multiple hydrogen bonding interactions, are formed by employing isophthalate-based organic ligands. 4-fold (3) and 3-fold (4) interpenetrations occur when organic linkers that have carboxylic acid groups located oppositely are used. Interestingly, the interpenetrating nets undergo phase transformation via two pathways involving solvent exchange/resolvation and solvent exchange/activation/resolvation, which reveals that the structures are flexible. Photoluminescence properties show the selective fluorescence quenching of 3 and 4 in nitrobenzene (NB) among the tested solvents. Such quenching is substantial even at low NB concentrations, which is associated with the existence of Lewis basic sites in the interpenetrating framework.

Graphical abstract: Two- and three-dimensional Zn(ii) coordination polymers constructed from mixed ligand systems: interpenetration, structural transformation and sensing behavior

Supplementary files

Article information

Article type
Paper
Submitted
21 jan 2016
Accepted
03 mar 2016
First published
03 mar 2016

CrystEngComm, 2016,18, 4349-4358

Two- and three-dimensional Zn(II) coordination polymers constructed from mixed ligand systems: interpenetration, structural transformation and sensing behavior

M. K. Park, K. S. Lim, J. H. Park, J. H. Song, D. W. Kang, W. R. Lee and C. S. Hong, CrystEngComm, 2016, 18, 4349 DOI: 10.1039/C6CE00155F

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