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      Enhanced Emission and Its Switching in Fluorescent Organic Nanoparticles

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      Journal of the American Chemical Society
      American Chemical Society (ACS)

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          Abstract

          A new class of organic nanoparticles (CN-MBE nanoparticles) with a mean diameter of ca. 30-40 nm, which exhibit a strongly enhanced fluorescence emission, were prepared by a simple reprecipitation method. CN-MBE (1-cyano-trans-1,2-bis-(4'-methylbiphenyl)ethylene) is very weakly fluorescent in solution, but the intensity is increased by almost 700 times in the nanoparticles. Enhanced emission in CN-MBE nanoparticles is attributed to the synergetic effect of intramolecular planarization and J-type aggregate formation (restricted excimer formation) in nanopaticles. On/off fluorescence switching for organic vapor was demonstrated with CN-MBE nanoparticles.

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          Author and article information

          Journal
          Journal of the American Chemical Society
          J. Am. Chem. Soc.
          American Chemical Society (ACS)
          0002-7863
          1520-5126
          December 2002
          December 2002
          : 124
          : 48
          : 14410-14415
          Article
          10.1021/ja0269082
          12452716
          d448d5a5-ab8d-4668-8b3c-c00dbf07ed6e
          © 2002
          History

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