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Department of Chemistry, Research Institute of Natural Sciences, Gyeongsang National University, Jinju 660-701, Korea
; Fax: +82 55-758-6027
; Tel: +82 55-751-6027
Department of Chemistry, The City College of New York, The Graduate School and University Center of the City University of New York and CUNY Institute of Macromolecular Assemblies, New York, USA
; Fax: +1 212-650-6107
; Tel: +1 212-650-8353
Chem. Soc. Rev., 2013,42, 924-936
04 Oct 2012,
First published online
28 Nov 2012
Coordination Polymer Gels (CPGs) constitute a subset of solid-like metal ion and bridging organic ligand structures (similar to metal–organic frameworks) that form multi-dimensional networks through a trapped solvent as a result of non-covalent interactions. While physical properties of these gels are similar to conventional high molecular weight organic polymer gels, coordination polymer gel systems are often fully reversible and can be assembled and disassembled in the presence of additional energy (heat, sonication, shaking) to give a solution of solvated gelators. Compared to gels resulting from purely organic self-assembled low molecular weight gelators, metal ions incorporated into the fibrilar networks spanning the bulk solvent can impart CPGs with added functionalities. The solid/liquid nature of the gels allows for species to migrate through the gel system and interact with metals, ligands, and the solvent. Chemosensing, catalysis, fluorescence, and drug-delivery applications are some of the many potential uses for these dynamic systems, taking advantage of the metal ion's coordination, the organic polydentate ligand's orientation and functionality, or a combination of these properties. By fine tuning these systems through metal ion and ligand selection and by directing self-assembly with external stimuli the rational synthesis of practical systems can be envisaged.
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