Highly effective chemosensor for mercury ions based on bispyrenyl derivative

Area of Science:

• Supramolecular Chemistry
• Analytical Chemistry
• Materials Science

Background:

• Cation recognition is crucial for environmental monitoring and biological sensing.
• Developing selective sensors for heavy metal ions like mercury is a significant challenge.
• Bispyrenyl azadiene derivatives offer potential as fluorescent chemosensors.

Purpose of the Study:

• To synthesize and characterize a new bispyrenyl azadiene derivative.
• To evaluate its cation recognition capabilities, particularly for mercury(II) ions.
• To explore its potential application in fluorescent sensing and ion-selective electrodes.

Main Methods:

• Synthesis of a novel bispyrenyl azadiene ligand.
• Spectroscopic analysis (UV-Vis, fluorescence) for cation binding studies.
• Fabrication and electrochemical evaluation of an ion-selective electrode (ISE).

Main Results:

• The synthesized ligand demonstrated strong selectivity for Hg(2+) over various other metal cations.
• An "Off-On" fluorescent response was observed in the presence of both Cu(2+) and Hg(2+).
• The fabricated ion-selective electrode showed excellent Hg(2+) selectivity with a low detection limit of 7.08 x 10(-6) M.

Conclusions:

• The new bispyrenyl azadiene derivative is a highly selective sensor for Hg(2+) ions.
• The fluorescent "Off-On" behavior provides a sensitive detection mechanism.
• The developed ion-selective electrode offers a promising tool for Hg(2+) determination.