Efficient Eu3+-Integrated UiO-66 Probe for Ratiometric Fluorescence Sensing of Styrene and Cyclohexanone
Zhijuan Zhang1,2, Luping Liu1, Teng Zhang1
1College of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
ACS Applied Materials & Interfaces
|April 7, 2023
Summary
A new bimetallic lanthanide metal-organic framework (Eu/Zr-UiO-66) enables sensitive fluorescence detection of volatile organic compounds (VOCs), specifically styrene and cyclohexanone, with low detection limits and visual recognition capabilities.
Area of Science:
- Materials Science
- Chemistry
- Environmental Science
Background:
- Sensitive detection of volatile organic compounds (VOCs) is crucial for public health and security.
- Metal-organic frameworks (MOFs) offer tunable properties for chemical sensing applications.
- Lanthanide-based MOFs provide unique luminescent properties for fluorescence sensing.
Purpose of the Study:
- To develop a novel bimetallic lanthanide metal-organic framework (Eu/Zr-UiO-66) for sensitive and selective VOC detection.
- To establish a ratiometric fluorescence probe for simultaneous detection of styrene and cyclohexanone.
- To investigate the sensing mechanisms and practical applicability of the developed MOF sensor.
Main Methods:
- One-pot synthesis of Eu/Zr-UiO-66 bimetallic MOFs.
- Utilizing fluorescence spectroscopy for quantitative analysis of VOCs.
- Developing ratiometric fluorescence sensing strategies based on emission intensity ratios.
- Evaluating sensor performance including limits of detection, selectivity, and reusability.
Main Results:
- Eu/Zr-UiO-66 was successfully synthesized and characterized.
- A ratiometric fluorescence probe was established using Eu/Zr-UiO-66 for styrene and cyclohexanone detection.
- Achieved low limits of detection (LODs) of 1.5 ppm for styrene and 2.5 ppm for cyclohexanone.
- Demonstrated visual recognition of styrene and cyclohexanone using test strips.
- Identified fluorescence quenching mechanisms involving electronegativity and Förster Resonance Energy Transfer (FRET).
Conclusions:
- Eu/Zr-UiO-66 serves as a highly effective platform for sensitive and selective fluorescence sensing of VOCs.
- The developed ratiometric probe offers a reliable method for simultaneous detection of styrene and cyclohexanone.
- The MOF-based sensor exhibits excellent anti-interference, reusability, and potential for on-site visual detection.
- This work presents a significant advancement in MOF-based chemical sensing for environmental and security applications.
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