A highly selective and colorimetric naked-eye chemosensor for Cu2+
Zhijun Wang1, Xiaojun Fan, Donghong Li
1Department of Chemistry, Changzhi University, Changzhi 046011, PR China.
Summary
A novel colorimetric chemosensor was developed for detecting copper ions (Cu2+). This practical sensor enables naked-eye detection with a distinct color change and UV absorption shift.
Area of Science:
- Analytical Chemistry
- Materials Science
Background:
- Metal cation detection is crucial in environmental and biological monitoring.
- Development of selective and sensitive chemosensors is an active research area.
Purpose of the Study:
- To design and synthesize a practical colorimetric chemosensor for metal cations.
- To evaluate the selectivity and sensitivity of the synthesized compound for specific metal ions.
Main Methods:
- Synthesis of 3-nitro-4-ethylenediamido-nitrobenzene (compound 2).
- Colorimetric and UV-Vis spectroscopic analysis for metal ion detection.
- Testing in a CH3OH/H2O solution at pH 7.6.
Main Results:
- The chemosensor exhibited high selectivity and sensitivity towards copper ions (Cu2+).
- A distinct color change from yellow to red was observed, detectable by the naked eye.
- UV absorption showed a new peak at 525 nm upon binding with Cu2+.
Conclusions:
- Compound 2 serves as an effective naked-eye colorimetric chemosensor for Cu2+ detection.
- The sensor offers a practical and visually discernible method for identifying copper ions.
