A naphthalene-based Al3+ selective fluorescent sensor for living cell imaging.

Area of Science:

• Analytical Chemistry
• Materials Science
• Biochemistry

Background:

• Aluminum ions (Al3+) play crucial roles in biological processes.
• Dysregulation of Al3+ is linked to various neurological disorders.
• Sensitive and selective detection methods for Al3+ are essential.

Purpose of the Study:

• To synthesize a novel fluorescent receptor for Al3+ detection.
• To evaluate the selectivity and sensitivity of the synthesized receptor.
• To assess the applicability of the receptor for intracellular Al3+ imaging.

Main Methods:

• Synthesis of N-(2-hydroxy-1-naphthalene)-N'-(2-(2-hydroxy-1-naphthalene)amino-ethyl)-ethane-1,2-diamine (L) via condensation reaction.
• Spectroscopic analysis (fluorescence) to determine receptor-Al3+ interaction.
• Testing selectivity against various metal ions in ethanol and HEPES buffer (pH 7.4).
• Demonstration of intracellular Al3+ detection using fluorescence microscopy.

Main Results:

• The synthesized ligand (L) exhibits efficient fluorescence response towards Al3+.
• The receptor demonstrates high selectivity and affinity for Al3+ over other tested metal ions.
• Detection limits of 3.0 × 10(-7) M in ethanol and 1.0 × 10(-7) M in HEPES buffer were achieved.
• Successful imaging of intracellular Al3+ using fluorescence microscopy.

Conclusions:

• The novel fluorescent receptor (L) is a promising tool for Al3+ sensing.
• Its high selectivity and sensitivity make it suitable for biological applications.
• The receptor facilitates the detection of intracellular Al3+ with high spatial resolution.