A cascade reaction-based switch-on fluorescent sensor for Ce(iv) ions in real samples.

Area of Science:

• Analytical Chemistry
• Environmental Science
• Materials Science

Background:

• Cerium(IV) ions are significant environmental pollutants.
• Developing sensitive and selective sensors for heavy metal detection is crucial.

Purpose of the Study:

• To develop a novel switch-on fluorescence sensor for the detection of cerium(IV) ions.
• To investigate the reaction mechanism for fluorescence generation.

Main Methods:

• A cascade reaction involving the oxidation of β-naphthol by Ce(iv) ions.
• Condensation of oxidized β-naphthol with o-phenylenediamine to form benzo[a]phenazine.
• Spectrofluorometric analysis for quantitative detection.

Main Results:

• The sensor exhibited a significant 200-fold fluorescence enhancement upon Ce(iv) ion detection.
• The developed sensor demonstrated successful application in real sample analysis.
• The mechanism involves Ce(iv)-mediated oxidation and subsequent condensation reactions.

Conclusions:

• The developed cascade reaction-based sensor offers a sensitive and effective method for Ce(iv) detection.
• This approach provides a valuable tool for environmental monitoring and analysis.
• The switch-on fluorescence mechanism allows for straightforward and reliable detection.