Highly selective and stable florescent sensor for Cd(II) based on poly (azomethine-urethane)

Area of Science:

• Analytical Chemistry
• Materials Science
• Environmental Science

Background:

• Heavy metal contamination, particularly Cadmium(II) (Cd(II)), poses significant environmental and health risks.
• Development of sensitive and selective detection methods for Cd(II) is crucial for environmental monitoring and safety.

Purpose of the Study:

• To synthesize and characterize a new poly(azomethine-urethane) derivative, HDI-co-3-DHB-2-AP.
• To evaluate the efficacy of HDI-co-3-DHB-2-AP as a fluorescent probe for the detection of Cd(II) ions.

Main Methods:

• Synthesis of the poly(azomethine-urethane) probe HDI-co-3-DHB-2-AP.
• Photoluminescence (PL) spectroscopy was employed to study the probe's response to various heavy metal ions.
• Interference studies were conducted with other common metal ions.

Main Results:

• The probe HDI-co-3-DHB-2-AP exhibited a linear and highly stable fluorescent response to Cd(II).
• A distinct emission peak shift to 562 nm was observed in the presence of Cd(II).
• Minimal interference was observed from other tested metal ions, indicating high selectivity.

Conclusions:

• HDI-co-3-DHB-2-AP functions as an effective optical sensor for Cd(II) detection.
• The sensor demonstrates a low detection limit of 8.86 × 10⁻⁴ mol L⁻¹, suitable for various applications.
• This probe offers a promising tool for sensitive and selective monitoring of Cadmium(II) in environmental samples.