Naphthalene derived Schiff base as a reversible fluorogenic chemosensor for aluminium ions detection

Area of Science:

• Coordination Chemistry
• Analytical Chemistry
• Materials Science

Background:

• Schiff bases are versatile organic compounds with diverse applications.
• Development of selective and sensitive chemosensors for metal ion detection is crucial for environmental monitoring and biological studies.
• Aluminum ions (Al3+) play significant roles in biological systems and environmental processes, necessitating accurate detection methods.

Purpose of the Study:

• To synthesize and characterize a novel Schiff base, HNPD.
• To develop HNPD as a fluorogenic chemosensor for the selective detection of aluminum ions (Al3+).
• To evaluate the sensor's performance in real-world environmental samples.

Main Methods:

• Synthesis of Schiff base HNPD via condensation reaction.
• Spectroscopic characterization (e.g., NMR, IR, UV-Vis) to confirm structure.
• Fluorescence spectroscopy to assess sensing capabilities for Al3+ and other metal ions.
• Density Functional Theory (DFT) calculations to understand sensing mechanism.

Main Results:

• Successful synthesis and spectroscopic confirmation of Schiff base HNPD.
• HNPD exhibited high fluorescence amplification and selectivity for Al3+ detection over other metal ions.
• Achieved a low limit of detection (0.0248 × 10-6 M) and a binding constant of 6.19 × 103 M-1 for Al3+.
• Intramolecular charge transfer kinetics and DFT studies elucidated the selective Al3+ binding mechanism.

Conclusions:

• The synthesized Schiff base HNPD is an effective fluorogenic chemosensor for Al3+ detection.
• The sensor demonstrates high sensitivity, selectivity, and practical applicability in real soil and water samples.
• This work contributes to the development of advanced analytical tools for environmental monitoring of aluminum.