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Title: Fluorescent magnesium(II) coordination polymeric hydrogel
Authors: Leong, W.L. 
Batabyal, S.K. 
Kasapis, S. 
Vittal, J.J. 
Keywords: Coordination polymers
Issue Date: 10-Oct-2008
Citation: Leong, W.L., Batabyal, S.K., Kasapis, S., Vittal, J.J. (2008-10-10). Fluorescent magnesium(II) coordination polymeric hydrogel. Chemistry - A European Journal 14 (29) : 8822-8829. ScholarBank@NUS Repository.
Abstract: A pH and mechano-responsive coordination polymeric gel was developed without the use of long chain hydrophobic groups. The hydrogel was synthesised by reacting the aqueous solution of Mg2+ with the basic aqueous solution of N-(7-hydroxyl-4-methyl-8-coumarinyl)-alanine. The gelation is attributed to the self-aggregation of ID coordination polymers to form 3D nanostructures through non-covalent interactions to entrap water molecules. The freeze-dried hydrogel exhibits a fibrillar network structure with a uniform ribbon shape. UV/vis absorption studies illustrate that the hydrogel displays a typical π-π* transition. The fluorescence intensity of the hydrogel is enhanced drastically with a longer lifetime upon gel formation. Mechanical analysis including dynamic oscillation on shear, steady shear and creep (retardation-relaxation) testing have been performed to elucidate the supramolecular nature of the 3D assembly. Together with the viscoelastic properties and biocompatibility, the Mg2+ hydrogel may find utility as a novel soft material in biomedical applications. © 2008 Wiley-VCH Verlag GmbH & Co. KGaA.
Source Title: Chemistry - A European Journal
ISSN: 09476539
DOI: 10.1002/chem.200801129
Appears in Collections:Staff Publications

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