Excitation energy migration processes in cyclic porphyrin arrays probed by single molecule spectroscopy

Jaesung Yang, Mira Park, Seok Yoon Zin, Takaaki Hori, Xiaobin Peng, Naoki Aratani, Peter Dedecker, Jun Ichi Hotta, Hiroshi Uji-i, Michel Sliwa, Johan Hofkens, Atsuhiro Osuka, Dongho Kim

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


By using single molecule fluorescence spectroscopy we have investigated the excitation energy migration processes occurring in a series of cyclic porphyrin arrays bearing a close proximity in overall architectures to the LH2 complexes in purple bacterial photosynthetic systems. We have revealed that the conformational heterogeneity induced by the structural flexibility in large cyclic porphyrin arrays, which provides the nonradiative deactivation channels as an energy sink or trap, reduces significantly the energy migration efficiency. Our study provides detailed information on the energy migration efficiency of the artificial light-harvesting arrays at the single molecule level, which will be a guideline for future applications in single molecular photonic devices in the solid state.

Original languageEnglish
Pages (from-to)1879-1884
Number of pages6
JournalJournal of the American Chemical Society
Issue number6
Publication statusPublished - 2008 Feb 13

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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