Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Energy Relaxation Dynamics of Excited Triplet States of Directly Linked Zn(II)Porphyrin Arrays

  • Song, Nam-Woong (Laser Metrology Laboratory, Korea Research Institute of Standards and Science) ;
  • Cho, Hyun-Sun (Center for Ultrafast Optical Characteristics Control and Department of Chemistry, Yonsei University) ;
  • Yoon, Min-Chul (Center for Ultrafast Optical Characteristics Control and Department of Chemistry, Yonsei University) ;
  • Aratani, Naoki (Department of Chemistry, Graduate School of Science, Kyoto University) ;
  • Osuka, Atsuhiro (Department of Chemistry, Graduate School of Science, Kyoto University) ;
  • Kim, Dong-Ho (Center for Ultrafast Optical Characteristics Control and Department of Chemistry, Yonsei University)
  • Published : 2002.02.20
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Abstract

The energy relaxation dynamics of the lowest excited singlet and triplet states of the Zn(II)porphyrin monomer and its directly linked arrays were comparatively investigated with increasing the number of porphyrin moieties. While the fluorescence decay rates and quantum yields of the porphyrin arrays increased with the increase of porphyrin units, their triplet-triplet (T-T) absorption spectra and decay times remained almost the same. The difference in the trends of energy relaxation dynamics between the excited singlet and triplet states has been discussed in view of the electronic orbital configurations.

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References

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