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A novel rhodamine-based Hg2+ sensor with a simple structure and fine performance.
Miaomiao Hong1, Yufen Chen, Yuping Zhang
1College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China. xdm.sd@163.com.
The Analyst
|October 31, 2019
Summary
A new sensor, 2-(2-((2-aminoethyl)thio)ethyl)-3
Area of Science:
- Analytical Chemistry
- Materials Science
- Environmental Science
Background:
- Mercury (Hg2+) is a toxic heavy metal pollutant.
- Developing selective and sensitive detection methods for Hg2+ is crucial for environmental and biological monitoring.
Purpose of the Study:
- To synthesize and characterize a novel spectral sensor, RMTE, for the detection of Hg2+.
- To evaluate the sensor's performance in terms of selectivity, sensitivity, reversibility, and applicability in real-world samples.
Main Methods:
- One-step synthesis of RMTE from rhodamine B and thiobisethylamine.
- Spectroscopic analysis (absorption and fluorescence) to detect Hg2+.
- Reversibility, selectivity, and pH-dependent studies.
- Application in environmental water and living cell imaging.
Main Results:
- RMTE exhibits a highly selective and reversible response to Hg2+ with distinct visual and fluorescence color changes.
- Detection limits for Hg2+ were as low as 0.14 μM (fluorescence) and 2.08 μM (absorbance).
- The sensor operates effectively within a biologically relevant pH range (6.41-8.33) and shows low cytotoxicity.
Conclusions:
- RMTE is an excellent spectral sensor for Hg2+ detection.
- The sensor demonstrates high sensitivity, selectivity, and reversibility.
- RMTE is suitable for monitoring Hg2+ in environmental water and living cells.
