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Published on: November 15, 2016
A Vibration-Induced Emission-Based Ratiometric Sensor for Detection of Anions in Aqueous Solution
Stephen M Butler1, Nikki A Tzioumis1, Katrina A Jolliffe1
1School of Chemistry and ARC Centre of Excellence for Innovations in Peptide and Protein Science, University of Sydney, Sydney, Australia.
Abstract:
Sensors that respond to anions via vibration-induced emission (VIE) have recently emerged as effective tools for discrimination between closely related carboxylate species in non-competitive, organic solvents. However, the utility of this sensing mechanism has not yet been demonstrated for anions in aqueous media. Here, we prepared two sensors, monoZnDPA-DPAC and ZnDPA-DPAC, with either one or two anion-binding motifs. These systems are capable of binding to anions in water. Dual emission via VIE is maintained in solvent mixtures of up to 70% water. ZnDPA-DPAC provides a unique, ratiometric response to citrate and phosphate, which was used for the accurate quantification of aqueous solutions of these anions.
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