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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Area of Science:

  • Materials Science
  • Chemistry
  • Sensor Technology

Background:

  • Porous covalent materials like COFs and COPs offer large surface areas, chemical stability, and insolubility.
  • Their tunable structures make them highly suitable for sensitive and selective sensor applications.
  • Fluorescence spectroscopy is a key detection method for these advanced materials.

Purpose of the Study:

  • To review the application of COFs and COPs in fluorescence-based sensing.
  • To explore the diverse range of analytes detected using these materials.
  • To analyze the sensing mechanisms and performance metrics.

Main Methods:

  • Focus on covalent polymeric systems utilizing fluorescence spectroscopy.
  • Review physical principles of fluorescence-based sensors.
  • Analyze literature on COFs and COPs for sensing various analytes.

Main Results:

  • COFs and COPs demonstrate significant potential in detecting heavy metal ions, explosives, biological molecules, amines, pH, VOCs, iodine, enantiomers, gases, and anions.
  • Sensing mechanisms and performance data (limits of detection, quenching constants) are discussed.
  • High sensitivity and selectivity are achieved due to tunable material structures.

Conclusions:

  • COFs and COPs are effective platforms for fluorescence-based chemical sensing.
  • Further research is needed to address challenges and advance future sensor development.
  • The review provides a comprehensive summary of current capabilities and future directions.