Rapid Communication in Photoscience

Korean Society of Photoscience (한국광과학회)
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Photochemical synthesis of diphenylphenanthrenes, and the photophysical properties studied by emission and transient absorption measurements

  • Yamaji, Minoru (Division of Molecular Science, Graduate School of Science and Engineering, Gunma University) ;
  • Hakoda, Yuuma (Education Program of Materials and Bioscience, Graduate School of Science and Engineering, Gunma University) ;
  • Horimoto, Ami (Education Program of Materials and Bioscience, Graduate School of Science and Engineering, Gunma University) ;
  • Okamoto, Hideki (Division of Earth, Life, and Molecular Sciences, Graduate School of Natural Science and Technology, Okayama University)
  • Received : 2014.12.07
  • Accepted : 2014.12.22
  • Published : 2014.12.31
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Abstract

Novel diphenylphenanthrenes (DPPs) were prepared by a photocyclization method, and the substituent effects of the phenyl groups on the photophysical properties of the phenanthrene chromophore were investigated based on measurements of fluorescence yields, lifetimes, and transient absorption. Fluorescence activities in DPPs are increased by introducing phenyl rings that can enhance the transition moment along the short axis of the phenanthrene skeleton. Intersystem crossing from the fluorescent states to the triplet manifolds is shown to be operative through the triplet-triplet absorption spectra obtained by laser photolysis techniques.

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References

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