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Facile and Efficient Preparation of Tri-component Fluorescent Glycopolymers via RAFT-controlled Polymerization
Published on: June 19, 2015
Fluorescent coordination polymeric gel from tartaric acid-assisted self-assembly.
Sudip K Batabyal1, Wei Lee Leong, Jagadese J Vittal
1Department of Chemistry, National University of Singapore, Singapore 117543.
Langmuir : the ACS Journal of Surfaces and Colloids
|February 19, 2010
Summary
A novel fluorescent organogel was synthesized using zinc acetate, a bipyridine ligand, and tartaric acid. This coordination polymer gel exhibits enhanced fluorescence and viscoelastic properties, offering new possibilities for material science applications.
Area of Science:
- Coordination Chemistry
- Supramolecular Chemistry
- Materials Science
Background:
- Organogels are materials that can gel organic liquids.
- Coordination polymers offer tunable properties.
- Fluorescence enhancement in aggregated states is a key phenomenon.
Purpose of the Study:
- To synthesize a novel fluorescent organogel.
- To investigate the formation mechanism and properties of the organogel.
- To explore the role of coordination polymers in fluorescence enhancement.
Main Methods:
- Sol-gel reaction involving zinc acetate, 1,4-bis(4-pyridyl)-2,3-diaza-1,3-butadiene (bpd), and tartaric acid (H4tar) in methanol.
- Characterization of the organogel structure and properties.
- Rheological studies to assess viscoelastic behavior.
Main Results:
- A fluorescent organogel was successfully obtained.
- The gelation mechanism involves cross-linking of 1D coordination polymers by tartrate coligands, entrapping solvent molecules via hydrogen bonding.
- Organogelation significantly enhanced the fluorescence of the weakly emissive bpd ligand.
- The organogel displayed viscoelastic behavior.
Conclusions:
- The three-component system is essential for organogel formation.
- The enhanced fluorescence is attributed to reduced nonradiative decay in the aggregated state.
- The developed organogel shows potential for applications requiring fluorescent and viscoelastic materials.
