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Miniaturized Separation-Sensing Tandem Enabled by Fluorescent Monoliths.

Jie Wang1, Ruijuan Wen1, Jinglin Kong2

  • 1Institute of New Concept Sensors and Molecular Materials, Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, China.

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Summary

This study introduces porous fluorescent monoliths, a novel material that integrates separation and sensing. This allows for discriminative detection of complex mixtures, overcoming previous sensing challenges.

Keywords:
BenzeneFluorescent sensorMonolithPerfluoroalkyl compoundSeparation

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Area of Science:

  • Materials Science
  • Analytical Chemistry
  • Chemical Engineering

Background:

  • Discriminative sensing of mixtures is challenging due to the lack of integrated separation units.
  • Existing sensors often require pre-separation steps, limiting on-site analysis.
  • Porous fluorescent monoliths offer a potential solution by combining separation and sensing capabilities.

Purpose of the Study:

  • To develop a novel sensing medium, porous fluorescent monoliths, capable of both separation and discriminative detection.
  • To establish a integrated separation-sensing platform for quantitative analysis of various analytes.
  • To demonstrate the potential for creating portable, on-site sensing devices.

Main Methods:

  • Synthesis of porous fluorescent monoliths via polymerization of specific tetrabenzaldehyde and diamines.
  • Systematic study of the photophysical properties and hierarchical porosity of the monoliths.
  • Development and application of a separation-sensing platform for diverse sample analyses.

Main Results:

  • The porous fluorescent monoliths exhibit tunable photophysical properties and controlled hierarchical porosity.
  • The separation-sensing platform successfully performed quantitative analysis of trace water in methanol, a sarin simulant, perfluoroalkyl compounds, and metal ions.
  • Baseline separation and low limits of detection (ng level) were achieved for benzene, toluene, ethylbenzene, and xylene.

Conclusions:

  • Porous fluorescent monoliths represent a novel material for integrated separation and sensing.
  • The developed separation-sensing platform enables sensitive and discriminative detection of complex mixtures.
  • This work provides a promising strategy for portable, on-site analytical devices for real-world samples.