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Using molecular rotors to probe gelation.

Jaclyn Raeburn1, Lin Chen, Salmah Awhida

  • 1Department of Chemistry, University of Liverpool, Crown Street, Liverpool, L69 7ZD, UK. d.j.adams@liverpool.ac.uk.

Soft Matter
|April 1, 2015
PubMed
Summary
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Fluorescent molecular rotors track dipeptide gelator assembly. A novel biosensor using this system enables glucose detection in urine, correlating with diabetes clinical assessments.

Area of Science:

  • Supramolecular chemistry
  • Biomedical engineering
  • Analytical chemistry

Background:

  • Dipeptide-based low molecular weight gelators self-assemble into complex structures.
  • Understanding the kinetics and mechanisms of gelator self-assembly is crucial for developing new materials and applications.
  • Fluorescent probes offer sensitive methods for monitoring dynamic processes like self-assembly.

Purpose of the Study:

  • To investigate the self-assembly process of dipeptide-based gelators using fluorescent probes.
  • To explore the potential of Thioflavin T as a molecular rotor in these gelling systems.
  • To develop a novel gelation-linked biosensing system for glucose detection in biological fluids.

Main Methods:

  • Utilized a series of fluorescent probes, including molecular rotors, to monitor dipeptide gelator self-assembly.

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  • Characterized the fluorescence properties of Thioflavin T within the gelling systems.
  • Integrated a molecular rotor into an assay with glucose oxidase for glucose-specific gelation and fluorescent output.

    • Main Results:

    • Fluorescent probes provided insights into the dipeptide gelator self-assembly process.
    • Thioflavin T demonstrated molecular rotor behavior in the gelling systems, with fluorescence data consistent with other rotors.
    • The developed biosensor showed excellent correlation with clinical assessments of diabetes when tested with patient urine samples.

    Conclusions:

    • Fluorescent molecular rotors are effective tools for studying the self-assembly of dipeptide-based gelators.
    • Thioflavin T can function as a molecular rotor in these systems.
    • The developed gelation-linked biosensor represents a promising new approach for diabetes diagnosis and monitoring.