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Korean Society of Photoscience (한국광과학회)
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Solvent effect on the excited state of stilbene dendrimers bearing phenylacetylene groups

  • Nishimura, Yoshinobu (Faculty of Pure and Applied Sciences, University of Tsukuba) ;
  • Arai, Tatsuo (Faculty of Pure and Applied Sciences, University of Tsukuba)
  • Received : 2014.12.01
  • Accepted : 2014.12.13
  • Published : 2014.12.31
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Abstract

We studied the characteristics of emissive state of the first (p-G1) and second (p-G2) generation of phenylacetylene dendrimers bearing stilbene as a core by using time-resolved fluorescence spectroscopy in cyclohexane (c-Hex) and N, N-dimethylformide (DMF), which are nonpolar and polar solvents, respectively. Time-dependent red-shift of emission spectra p-G2 both in c-Hex and DMF was observed in comparison with p-G1. Besides, the time constant of red-shift of spectra was found to be larger in DMF than in c-Hex. This indicates that the emissive state of p-G2 has a polar character in DMF as a result of charge delocalization from core to peripheral dendrons followed by stabilization of emissive state.

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References

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