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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.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|April 7, 2025
Summary
New sensors detect anions in water using vibration-induced emission (VIE). These sensors accurately quantify citrate and phosphate in aqueous solutions, expanding VIE sensing to biological and environmental applications.
Area of Science:
- Analytical Chemistry
- Supramolecular Chemistry
- Chemical Sensing
Background:
- Vibration-induced emission (VIE) sensors show promise for distinguishing similar anions in organic solvents.
- Demonstrating VIE sensing in aqueous media is crucial for broader applications.
Purpose of the Study:
- To develop and evaluate anion sensors capable of functioning in aqueous environments.
- To assess the utility of VIE sensing for anion discrimination in water.
Main Methods:
- Synthesis of two novel sensors: monoZnDPA-DPAC and ZnDPA-DPAC, with varying anion-binding sites.
- Testing sensor performance in aqueous-organic solvent mixtures.
- Utilizing dual emission via VIE for anion detection and quantification.
Main Results:
- The sensors effectively bind anions in water.
- Dual emission via VIE is sustained in up to 70% aqueous mixtures.
- ZnDPA-DPAC exhibits a unique ratiometric response to citrate and phosphate.
Conclusions:
- The developed sensors demonstrate successful anion detection in aqueous media using VIE.
- ZnDPA-DPAC enables accurate quantification of citrate and phosphate, validating VIE sensing in water.
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