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Accessing new microporous polyspirobifluorenes via a C/Si switch.

Andrei Nesmelov1, David Lee, Christopher Bejger

  • 1Department of Chemistry, University of North Carolina - Charlotte, Charlotte, NC 28223, USA. Tom.Schmedake@uncc.edu.

Chemical Communications (Cambridge, England)
|July 28, 2020
PubMed
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New microporous spirosilabifluorene networks show bright fluorescence. Their fluorescence is quenched by nitroaromatics, making them useful for sensing applications.

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Area of Science:

  • Materials Science
  • Organic Chemistry
  • Polymer Chemistry

Background:

  • Spirobifluorene frameworks are known for their unique optical and electronic properties.
  • Microporous organic polymers offer high surface areas and tunable functionalities.
  • Nitroaromatic compounds are common environmental pollutants and explosives.

Purpose of the Study:

  • To synthesize novel microporous spirosilabifluorene networks.
  • To investigate the fluorescence properties of these networks.
  • To explore their potential for sensing nitroaromatic compounds.

Main Methods:

  • Yamamoto coupling reaction of tetrabromospirosilabifluorene precursors.
  • Characterization of the synthesized networks using spectroscopic and microscopic techniques.
  • Fluorescence quenching studies in the presence of nitroaromatics.

Main Results:

  • Successful synthesis of microporous spirosilabifluorene networks.
  • Observation of bright fluorescence emission from the networks.
  • Significant fluorescence quenching upon exposure to nitroaromatics, indicating sensing capability.
  • Subtle effects of the carbon-silicon (C/Si) switch on optical properties.

Conclusions:

  • Microporous spirosilabifluorene networks are promising fluorescent materials.
  • The developed networks can be used for the sensitive detection of nitroaromatics.
  • The C/Si switch offers a method for tuning polybifluorene structures and properties.