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Fluorescent magnesium (II) coordination polymeric hydrogel

Publication Type : Journal Article

Publisher : Chemistry – A European Journal

Source : Chemistry–A European Journal Volume 14 Issue 29 Pages 8822-8829, 2008

Campus : Coimbatore

School : School of Physical Sciences

Center : Center for Industrial Research and Innovation (ACIRI)

Year : 2008

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 1D 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.

Cite this Research Publication : Wei Lee Leong, Sudip K Batabyal, Stefan Kasapis, Jagadese J Vittal, "Fluorescent magnesium (II) coordination polymeric hydrogel", Chemistry–A European Journal Volume 14 Issue 29 Pages 8822-8829, 2008

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