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Updated: Jun 26, 2025
08:27
Highly Sensitive and Rapid Fluorescence Detection with a Portable FRET Analyzer
Published on: October 1, 2016
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A novel fluorescent indicator-based fluorene derivative for rapid and visual trace water sensing
Juan Chen1, Shengfeng Cui1, Jingwei Wan1
1Zhengzhou Key Laboratory of Criminal Science and Technology, Department of Criminal Science and Technology, Railway Police College, Zhengzhou, China.
Summary
A new fluorescent probe detects trace water in organic solvents quickly and sensitively. This innovation enables rapid water content analysis using portable devices and smartphones.
Area of Science:
- Organic Chemistry
- Analytical Chemistry
- Materials Science
Background:
- Fluorene derivatives are promising for developing advanced fluorescence probes.
- Solvation chromogenic effects offer potential for sensing applications.
- Trace water detection in organic solvents is crucial for various industries.
Purpose of the Study:
- To develop a novel fluorescent probe based on a fluorene core and azacyclobutane.
- To investigate the probe's response to varying solvent polarity and its application in trace water detection.
- To establish a rapid and sensitive method for quantifying water content in organic solvents.
Main Methods:
- Synthesis of a novel fluorescent probe by reacting a fluorene core with azacyclobutane.
- Characterization of the probe's fluorescence properties in different solvents, focusing on solvatochromism.
- Development of a fluorescence quenching-based sensing system for trace water detection.
- Theoretical calculations using time-dependent density functional theory (TDDFT) to elucidate the luminescence mechanism.
- Application of the probe in dipstick format for practical water content analysis.
Main Results:
- The novel fluorene-based probe exhibited a typical solvation chromogenic effect, with fluorescence quenching in highly polar solvents.
- A sensitive and fast (30 seconds) fluorescence system for trace water detection was constructed.
- The detection limit for water content in dimethyl sulfoxide (DMSO) reached 0.13%.
- The probe was successfully applied to detect trace water in honey and alcohol using a dipstick format.
- Theoretical calculations supported the observed luminescence mechanism.
Conclusions:
- The developed fluorescent probe offers a sensitive and rapid method for trace water detection in organic solvents.
- The probe's ability to be integrated with portable devices and smartphones facilitates on-site analysis.
- This work presents a new strategy for designing efficient fluorescent probes for dipstick and mobile phone-based detection systems.
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