Explosive and pollutant nitroaromatic sensing through a Cd(II) based ladder shaped 1D coordination polymer

Area of Science:

• Materials Science
• Environmental Science
• Analytical Chemistry

Background:

• Nitroaromatic compounds pose significant environmental and national security risks.
• Developing sensitive and selective sensors for these compounds is crucial for detection and monitoring.
• Material researchers face challenges in creating effective detection systems for explosives and pollutants.

Purpose of the Study:

• To synthesize and characterize a novel Cd(II)-based 1D ladder coordination polymer.
• To investigate the potential of this coordination polymer as a fluorescent sensor for nitroaromatic compounds.
• To elucidate the sensing mechanism and assess the sensor's performance metrics.

Main Methods:

• Synthesis of a new Cd(II)-based 1D ladder coordination polymer, [Cd(4-bpd)(3-cbn)]n.
• Characterization using single crystal X-ray diffraction analysis.
• Fluorescence quenching method for detecting 2,4,6-trinitrophenol, supported by FESEM and theoretical studies.

Main Results:

• The synthesized coordination polymer, [Cd(4-bpd)(3-cbn)]n, was successfully characterized.
• The compound exhibited efficient fluorescence quenching detection of 2,4,6-trinitrophenol.
• A low limit of detection (0.260 μM) and a high Stern-Volmer coefficient (6.047 × 10^3 M^-1) were achieved.

Conclusions:

• The Cd(II)-based coordination polymer demonstrates high sensitivity and selectivity for detecting 2,4,6-trinitrophenol.
• The fluorescence quenching mechanism is well-supported by experimental and theoretical findings.
• This research offers a promising platform for developing next-generation sensor technologies for hazardous nitroaromatic compounds.