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A colorimetric and fluorometric dual-mode probe for Cu2+detection based on functionalized silver nanoparticles.
Guixiang Yao1, Shuju Fang1, Pengyuan Yin1
1Key Laboratory of Resource Clean Conversion in Ethnic Regions, Education Department of Yunnan, Key Laboratory of Environmental Functional Materials of Yunnan Province Education Department, School of Chemistry and Environment, Yunnan Minzu University, Kunming, 650500, People's Republic of China.
A new dual-mode probe using silver nanoparticles (AgNPs) and rhodamine 6G derivative (Rh6G2) offers sensitive detection of copper ions. This method provides a reliable tool for environmental monitoring and developing new detection platforms.
Area of Science:
- * Nanotechnology
- * Analytical Chemistry
- * Environmental Science
Background:
- * Developing sensitive and selective methods for detecting heavy metal ions like copper is crucial for environmental monitoring.
- * Existing detection methods may lack dual-mode capabilities or require complex procedures.
- * Silver nanoparticles (AgNPs) offer unique optical properties suitable for probe development.
Purpose of the Study:
- * To synthesize and characterize a novel dual-mode (colorimetric/fluorescent) probe for copper ion detection.
- * To establish the linear ranges and limits of detection for both colorimetric and fluorescent modes.
- * To evaluate the probe's efficacy in detecting copper ions in real environmental samples, such as sediment.
Main Methods:
- * Synthesis of a probe by linking silver nanoparticles (AgNPs) with a rhodamine 6G derivative (Rh6G2) using glutathione (GSH) as a linker.
- * Investigation of the probe's response (fluorescence and colorimetric changes) upon interaction with copper ions.
- * Construction and validation of a dual-mode detection method for copper ions.
Main Results:
- * The synthesized probe (AgNPs-GSH-Rh6G2) exhibited distinct fluorescence and colorimetric changes in the presence of copper ions.
- * Linear detection ranges were established: 0.10–0.45 mM (fluorescence) and 0.15–0.65 mM (colorimetric).
- * Limits of detection were determined as 0.18 μM (fluorescence) and 24.90 μM (colorimetric), with satisfactory results in sediment samples.
Conclusions:
- * The novel AgNPs-GSH-Rh6G2 probe provides a reliable and sensitive dual-mode platform for copper ion detection.
- * This work offers a new strategy for developing multi-mode detection platforms for various analytes.
- * The probe demonstrates potential for practical application in environmental sample analysis.
