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A persistent luminescent nanobeacon for practical detection of lead ions via avoiding background interference
Qi Luo1, Lingfeng Qin2, Peng Zhang2
1College of Environment and Resources, Xiangtan University, Xiangtan, 411105, Hunan, China; Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha, 410114, Hunan, China.
A novel persistent luminescent nanobeacon effectively detects heavy metal ions in real water samples. This method overcomes background interference, offering a more accessible approach for accurate water pollution monitoring.
Area of Science:
- Environmental Science
- Analytical Chemistry
- Materials Science
Background:
- Heavy metal ions pose significant water pollution risks.
- Accurate detection is crucial for environmental protection and pollution control.
- Background interference complicates fluorescent analysis in complex samples.
Purpose of the Study:
- To develop a method for detecting metal ions in real samples while mitigating background interference.
- To introduce a persistent luminescent nanobeacon for enhanced signal-to-background ratios.
- To demonstrate the practical application of this technology in environmental monitoring.
Main Methods:
- Synthesis of Zn2GeO4:Mn persistent luminescence nanorods (PLNRs).
- Functionalization of PLNRs with the 17E DNAzyme for specific lead ion (Pb2+) recognition.
- Utilizing persistent luminescence for detection to circumvent background noise.
Main Results:
- The nanobeacon selectively recognized and detected Pb2+ with high signal-to-background ratios (SBR) in both buffer and real samples.
- Persistent luminescence detection maintained high SBR in complex matrices, unlike traditional fluorescence.
- Demonstrated superior performance compared to methods solely focused on improving fluorescent SBR.
Conclusions:
- The persistent luminescent nanobeacon offers a practical and accessible solution for metal ion detection in real-world water samples.
- This approach effectively overcomes background interference issues inherent in fluorescent methods.
- The adaptable DNAzyme-based design allows for the detection of various metal ions.
