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Quantifying the Binding Interactions Between CuII and Peptide Residues in the Presence and Absence of Chromophores

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A Highly Efficient BODIPY Based Turn-off Fluorescent Probe for Detecting Cu².

Ruopei Sun¹, Lusheng Wang¹, Chao Jiang¹

¹School of Nuclear Science and Technology, Lanzhou University, 222 Tianshui South Rd, Chengguan District, Lanzhou, Gansu, China.

Journal of Fluorescence

|June 5, 2020

Summary

A new fluorescent probe, HHPBA-BODIPY, effectively detects copper ions (Cu2+) in water. This BODIPY-based sensor shows high sensitivity and selectivity, enabling environmental monitoring.

Keywords:

BODIPY Copper ion detection Cu2+Fluorescent probe

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Area of Science:

Analytical Chemistry
Materials Science
Environmental Science

Background:

Boron-dipyrromethene (BODIPY) derivatives are widely used as fluorescent materials.
Developing selective and sensitive probes for metal ion detection is crucial for environmental and biological monitoring.

Purpose of the Study:

To design, synthesize, and characterize a novel fluorescent probe, HHPBA-BODIPY, for the sensitive detection of copper ions (Cu2+).
To evaluate the probe's selectivity and efficiency in real water samples for environmental monitoring applications.

Main Methods:

Synthesis and characterization of the HHPBA-BODIPY fluorescent probe.
Spectroscopic analysis (absorption and emission) to determine the probe's optical properties.
Investigation of the probe's response to Cu2+ ions, including fluorescence quenching and linearity analysis.
Selectivity studies against various metal ions and testing in environmental water samples.

Main Results:

The HHPBA-BODIPY probe exhibits strong green fluorescence around 510 nm with maximum absorption near 500 nm.
Fluorescence intensity is quenched linearly with increasing Cu2+ concentration, with a detection limit of 0.35 μM.
The probe demonstrates high selectivity for Cu2+ over most other tested metal ions, with minor interference from Fe3+ and Cr3+.
HHPBA-BODIPY proved effective for detecting Cu2+ in real water samples.

Conclusions:

HHPBA-BODIPY is a sensitive and selective fluorescent probe for Cu2+ detection.
The probe's performance in water samples highlights its potential for environmental monitoring of copper ions.
This BODIPY-based probe offers a promising tool for trace metal analysis.