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Self-sorted photoconductive xerogels.

Emily R Draper1, Jonathan R Lee2,3, Matthew Wallace1

  • 1Department of Chemistry , University of Liverpool , Crown Street , Liverpool , L69 7ZD , UK .

Chemical Science
|April 29, 2017
PubMed
Summary
This summary is machine-generated.

Researchers created self-sorted gels using perylene bisimide (PBI) and stilbene gelators. These novel materials exhibit enhanced photoconductivity, showing potential for visible-active optoelectronics.

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Area of Science:

  • Supramolecular Chemistry
  • Materials Science
  • Organic Electronics

Background:

  • Perylene bisimide (PBI) and stilbene derivatives are known for their unique photophysical properties.
  • Self-assembly of gelators into ordered structures is crucial for advanced material applications.
  • Controlling the morphology and properties of multicomponent gels remains a significant challenge.

Purpose of the Study:

  • To investigate the formation and properties of self-sorted gels composed of PBI and stilbene-based gelators.
  • To explore the impact of self-sorting on the photoconductive properties of the resulting xerogels.
  • To understand the photophysical mechanisms underlying the enhanced performance of these multicomponent systems.

Main Methods:

  • Gelation induced by a slow pH change via glucono-δ-lactone (GdL) hydrolysis.
  • Characterization of self-sorting using Nuclear Magnetic Resonance (NMR) spectroscopy, UV-Vis spectroscopy, rheology, and viscometry.
  • Photoconductivity measurements and transient absorption spectroscopy to probe electronic properties and dynamics.

Main Results:

  • Successful formation of self-sorted gels from PBI and stilbene gelators.
  • Demonstrated photoconductivity in the resulting xerogels with altered wavelength dependence compared to PBI alone.
  • Evidence of PBI radical anion formation within picoseconds in the presence of stilbene, observed via transient absorption spectroscopy.

Conclusions:

  • The controlled self-sorting of PBI and stilbene gelators leads to materials with unique optoelectronic properties.
  • The formation of PBI radical anions under visible light enhances the spectral response of the multicomponent gels.
  • These self-sorted gel systems hold significant potential for applications in visible-active optoelectronics.