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A Smart pH-Responsive Three Components Luminescent Hydrogel.

Yibao Li1, Wei Liu2, Linxiu Cheng3

  • 1Key Laboratory of Organo-pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, China. liyib@126.com.

Journal of Functional Biomaterials
|September 15, 2016
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel luminescent hydrogel using amino acid derivatives, riboflavin, and melamine. This pH-responsive material exhibits reversible fluorescence changes, showing potential for nano pH sensors.

Keywords:
hydrogelluminescencepH-response

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Area of Science:

  • Materials Science
  • Supramolecular Chemistry
  • Nanotechnology

Background:

  • Hydrogels are versatile materials with applications in sensing and drug delivery.
  • Luminescent materials offer unique properties for optical detection.
  • pH-responsive materials are crucial for developing smart sensors.

Purpose of the Study:

  • To synthesize and characterize a novel three-component luminescent hydrogel.
  • To investigate the self-assembly mechanism driven by hydrogen bonding and π-π stacking.
  • To explore the pH-responsive luminescent properties and potential applications.

Main Methods:

  • Synthesis of a hydrogel from N,N'-di valine-3,4,9,10-perylenetetracarboxylic acid (NVPD), riboflavin (RF), and melamine (MM).
  • Characterization of hydrogel structure and properties using techniques like fluorescence spectroscopy.
  • Investigation of pH-dependent gel-solution transitions and fluorescence changes.

Main Results:

  • A stable three-component luminescent hydrogel was successfully formed.
  • The hydrogel formation is driven by multiple hydrogen bonds and π-π stacking interactions.
  • The hydrogel exhibits reversible pH-responsive behavior, transitioning between gel and solution states (pH 6.1-10.6) with altered fluorescence.
  • Green fluorescence emission was observed under 498 nm excitation.

Conclusions:

  • The developed hydrogel demonstrates tunable, reversible luminescent properties based on pH.
  • The material's pH-responsive nature suggests its utility in developing advanced nano pH sensors.
  • This work highlights the potential of combining small organic molecules for functional supramolecular materials.