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Selective fluorescence sensors for Cu2+ and Hg2+ ions using acridinium-polymer complexes
Jingqiu Hu1, Bryce Volker1, Maima Bogar1
1West Chester University of Pennsylvania, 700 South High Street, West Chester, PA 19383, United States.
Summary
This study shows poly(methacrylic acids) enhance acridinium dye fluorescence. The polymer-dye system detects copper ions and mercury ions in aqueous solutions, offering a sensitive and eco-friendly analytical method.
Area of Science:
- Photochemistry
- Analytical Chemistry
- Polymer Science
Background:
- Acridinium derivatives are fluorescent dyes.
- Poly(methacrylic acids) (PMAA) can influence dye properties.
- Developing sensitive and eco-friendly analytical methods is crucial.
Purpose of the Study:
- To investigate the photophysical properties of acridinium derivatives (Ph-Acr+, Mes-Acr+) in PMAA solutions.
- To explore the potential of these systems for detecting metal ions.
- To establish an environmentally friendly analytical method.
Main Methods:
- Studied photophysical properties of 9-phenyl-10-methylacridinium (Ph-Acr+) and 9-mesityl-10-methyl acridinium (Mes-Acr+) in PMAA.
- Varied pH and polymer-to-dye ratios in aqueous solutions.
- Investigated responses to copper (II) and mercury (II) ions.
Main Results:
- PMAA enhanced acridinium emission in acidic conditions.
- Copper (II) ions selectively quenched emission with a limit of detection (LOD) of 0.38 µM.
- Mercury (II) ions enhanced emission in near-neutral conditions with a low LOD of 43.6 nM.
Conclusions:
- Acridinium-PMAA systems offer sensitive detection of Cu2+ and Hg2+.
- The method is fast, cost-effective, and uses aqueous solutions.
- This approach provides an environmentally friendly analytical tool.
