Single-molecule spectroscopic investigation of energy migration processes in cyclic porphyrin arrays

Mira Park, Min Chul Yoon, Zin Seok Yoon, Takaaki Hori, Xiaobin Peng, Naoki Aratani, Jun Ichi Hotta, Hiroshi Uji-I, Michel Sliwa, Johan Hofkens, Atsuhiro Osuka, Dongho Kim

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


Covalently linked cyclic porphyrin arrays have been synthesized to mimic natural light-harvesting apparatuses and to investigate the highly efficient energy migration processes occurring in these systems for future applications in molecular photonics. To avoid an ensemble-averaged picture, we performed a single-molecule spectroscopic study on the energy migration processes of cyclic porphyrin arrays and a linear model compound embedded in a rigid polymer matrix by recording fluorescence intensity trajectories, by performing coincidence measurements, and by doing wide-field defocused imaging. Our study demonstrates efficient energy migration within the cyclic porphyrin arrays at the single-molecule level. By comparison with the data of the linear model compound, we could pinpoint the role of the dipole-dipole coupling between diporphyrin subunits and the rigidity of the cyclic structures on the energy transfer processes.

Original languageEnglish
Pages (from-to)3539-3544
Number of pages6
JournalJournal of the American Chemical Society
Issue number12
Publication statusPublished - 2007 Mar 28

All Science Journal Classification (ASJC) codes

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


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