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Surface patterned pH-sensitive fluorescence using β-cyclodextrin functionalized poly(ethylene glycol).

Sung Han Kim1, Shazid Md Sharker2, Insik In3

  • 1Department of IT Convergence, Korea National University of Transportation, Chungju 380-702, Republic of Korea.

Carbohydrate Polymers
|May 15, 2016
PubMed
Summary
This summary is machine-generated.

This study introduces a pH-responsive molecular pattern for fluorescent sensing. The pattern enables selective molecule detection on various surfaces, aiding diagnostics and environmental monitoring.

Keywords:
Boronate esterCyclodextrinHost-guest interactionSurface patternpH responsive

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Developing selective sensors for molecular detection is crucial for diagnostics and environmental monitoring.
  • pH-responsive materials offer tunable properties for controlled interactions.

Purpose of the Study:

  • To develop a pH-responsive molecular pattern for selective host-guest interactions.
  • To utilize this pattern as a pH fluorescent sensor for molecule discrimination on diverse substrates.

Main Methods:

  • Formation of a pH-responsive boronate ester linkage between beta-cyclodextrin (CD) and poly(ethylene glycol) functionalized phenylboronic acid.
  • Printing of the molecular pattern onto a versatile substrate.
  • Characterization using confocal laser scanning microscopy, fluorescence spectroscopy, and 1H NMR.

Main Results:

  • Demonstrated reversible formation of a molecular lining pattern controlled by pH.
  • Confirmed acid-labile nature of the boronate ester bridge, enabling removal of the CD monolayer.
  • Successful visualization of pH-responsive fluorescence using a rhodamine-CD complex for molecule discrimination.

Conclusions:

  • The developed pH-responsive molecular pattern acts as an effective fluorescent sensor.
  • This sensor allows straightforward discrimination of molecules on any surface.
  • Potential applications in clinical diagnostics and environmental monitoring are facilitated.