An Amidochlorin-Based Colorimetric Fluorescent Probe for Selective Cu(2+) Detection.

Area of Science:

• Analytical Chemistry
• Environmental Science
• Materials Science

Background:

• Developing selective and sensitive chemosensors is crucial for quantifying ionic species.
• Amidochlorin p6 (ACP) is derived from methyl pheophorbide-a (MPa).

Purpose of the Study:

• To design and synthesize a novel colorimetric and fluorescent probe (ACP) for copper ions (Cu2+).
• To evaluate the probe's sensitivity, selectivity, and applicability for detecting Cu2+ in aqueous solutions.

Main Methods:

• Synthesis of amidochlorin p6 (ACP) from methyl pheophorbide-a (MPa).
• Spectrophotometric and fluorometric analysis of ACP in the presence of various metal ions.
• Determination of the detection limit and selectivity profile of the ACP probe for Cu2+.

Main Results:

• ACP exhibited a distinct color change from pale yellow to blue upon interaction with Cu2+ ions.
• Fluorescence quenching was observed, indicating complexation between ACP and Cu2+.
• The probe demonstrated a low detection limit of 7.5 × 10(-8) mol/L for Cu2+.
• ACP showed excellent selectivity for Cu2+ over a range of other metal ions.

Conclusions:

• Amidochlorin p6 (ACP) is a highly sensitive and selective chemosensor for Cu2+ detection in aqueous solutions.
• The probe's visual color change allows for naked-eye detection, making it a practical indicator for copper ions.