A quinoline derivative as an efficient sensor to detect selectively Al³⁺ ion

Area of Science:

• Analytical Chemistry
• Materials Science

Background:

• Schiff bases are versatile organic compounds with diverse applications.
• Fluorescence chemosensors offer sensitive and selective detection methods for metal ions.
• Aluminum ion (Al3+) detection is crucial in environmental and biological monitoring.

Purpose of the Study:

• To develop and characterize a novel quinoline-based Schiff base as a fluorescence chemosensor.
• To investigate the selective detection of aluminum ions (Al3+) using the synthesized chemosensor.
• To evaluate the sensing performance, including sensitivity and selectivity.

Main Methods:

• Synthesis and characterization of the quinoline-based Schiff base (Receptor 1).
• Fluorescence spectroscopy was employed to study the interaction between Receptor 1 and Al3+.
• Determination of the association constant and detection limit for Al3+ detection.

Main Results:

• The quinoline-based Schiff base (Receptor 1) demonstrated selective fluorescence response to Al3+.
• A high association constant (3.67 × 10^5 M^-1) was observed for the Al3+-Receptor 1 complex.
• A submicromolar detection limit (0.18 ppm) for Al3+ was achieved in acetonitrile solution.

Conclusions:

• The developed quinoline-based Schiff base is a highly efficient and selective fluorescence chemosensor for Al3+ detection.
• The sensor exhibits excellent sensitivity, with a low detection limit suitable for practical applications.
• This work provides a promising platform for developing advanced chemosensors for metal ion analysis.