Pyrene-Integrated Cationic Organic Network: A Dual-Functionalized Platform for Simultaneous Chromate Detection and...

Area of Science:

• Materials Science
• Environmental Chemistry
• Analytical Chemistry

Background:

• Toxic heavy metal oxoanions, such as chromate (CrO4 2-), are significant water contaminants.
• Industrial processes release chromate, posing risks to human health and ecosystems.
• Efficient detection and removal of chromate from water are crucial.

Purpose of the Study:

• To synthesize novel pyrene-integrated cationic organic networks (CONs) for chromate detection and removal.
• To optimize CON properties by modulating pyrene unit content.
• To evaluate the sensing and adsorption performance of the optimized CON material.

Main Methods:

• Multivariate synthesis strategy to create pyrene-integrated CONs.
• Characterization of CONs for fluorescence properties.
• Testing selectivity and sensitivity for chromate detection among various anions.
• Assessing chromate adsorption kinetics and capacity.

Main Results:

• An optimized CON (CON-LDU8-30%) was synthesized with superior fluorescence properties.
• CON-LDU8-30% demonstrated highly sensitive and selective "turn-off" fluorescence detection of chromate.
• The material exhibited efficient chromate adsorption with a high adsorption capacity (150 mg g-1).

Conclusions:

• Pyrene-integrated CONs effectively combine fluorescent sensing and adsorption removal of chromate.
• The developed material shows significant potential for practical application in water treatment.
• This study offers a novel approach to addressing toxic heavy metal contamination in water sources.