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A 'Plug and Play' Method to Create Water-dispersible Nanoassemblies Containing an Amphiphilic Polymer, Organic Dyes and Upconverting Nanoparticles
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Published on: November 14, 2015

Fast fluorescence switching within hydrophilic supramolecular assemblies.

Janet Cusido1, Mutlu Battal, Erhan Deniz

  • 1Laboratory for Molecular Photonics, Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431, USA.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|May 31, 2012
PubMed
Summary

Researchers developed a supramolecular method to control fluorescence in water using light. This technique utilizes amphiphilic polymers to encapsulate fluorophore-photochrome molecules, enabling rapid, reversible fluorescence modulation for potential biological imaging applications.

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Area of Science:

  • Supramolecular Chemistry
  • Polymer Science
  • Photochemistry

Background:

  • Developing methods for optical control of fluorescence in aqueous environments is crucial for advanced imaging.
  • Existing techniques often face limitations in speed, reversibility, or biocompatibility.

Purpose of the Study:

  • To design a supramolecular strategy for modulating fluorescence in water using optical control.
  • To create nanostructured constructs with fast, reversible fluorescence switching capabilities.

Main Methods:

  • Employed a supramolecular strategy involving amphiphilic polymers to encapsulate fluorophore-photochrome dyads.
  • Utilized ultraviolet light to reversibly operate the photochromic component on a microsecond timescale.
  • Investigated the photomodulation of fluorescence in aqueous solutions over hundreds of cycles.

Main Results:

  • Successfully demonstrated reversible fluorescence modulation in water under optical control.
  • Achieved microsecond switching speeds for fluorescence intensity changes.
  • Developed nanostructured constructs exhibiting stable photomodulation for hundreds of cycles.

Conclusions:

  • The developed supramolecular strategy offers a robust method for fast fluorescence switching in aqueous solutions.
  • This approach holds promise for creating novel functional probes for investigating biological samples.
  • The system provides a foundation for advanced optical control in bioimaging and sensing.