A high-efficiency salamo-based copper(ii) complex double-channel fluorescent probe

Area of Science:

• Analytical Chemistry
• Inorganic Chemistry
• Chemical Sensing

Background:

• Sulfide ions (S^2-) are crucial in biological processes but require sensitive detection methods.
• Existing detection methods for sulfide can be complex or lack selectivity.
• Development of novel chemosensors is needed for efficient sulfide detection.

Purpose of the Study:

• To synthesize and characterize a salamo-based copper(II) complex probe (L-Cu²⁺).
• To evaluate the probe's efficacy in detecting sulfide ions (S^2-) with high sensitivity and selectivity.
• To explore the probe's potential for visual detection of sulfide and hydrogen sulfide (H₂S).

Main Methods:

• Synthesis of a salamo-based copper(II) complex probe (L-Cu²⁺).
• Spectroscopic analysis including UV-Vis absorption and fluorescence spectroscopy.
• Testing selectivity against various interfering anions.
• Visual colorimetric detection and H₂S gas sensing experiments.

Main Results:

• The L-Cu²⁺ probe exhibited a strong fluorescence response upon interaction with sulfide ions (S^2-).
• High sensitivity and selectivity for S^2- detection were confirmed, even in the presence of other anions.
• A visible color change from colorless to bright yellow occurred upon S^2- addition.
• The probe successfully detected S^2- in H₂S gas molecules.

Conclusions:

• The developed L-Cu²⁺ probe is effective for sensitive and selective sulfide detection.
• The probe allows for naked-eye detection of sulfide ions via a colorimetric response.
• This probe holds significant potential for applications in biological and medical diagnostics.