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

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33 Citations (Scopus)

Abstract

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
Volume129
Issue number12
DOIs
Publication statusPublished - 2007 Mar 28

All Science Journal Classification (ASJC) codes

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

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    Park, M., Yoon, M. C., Yoon, Z. S., Hori, T., Peng, X., Aratani, N., Hotta, J. I., Uji-I, H., Sliwa, M., Hofkens, J., Osuka, A., & Kim, D. (2007). Single-molecule spectroscopic investigation of energy migration processes in cyclic porphyrin arrays. Journal of the American Chemical Society, 129(12), 3539-3544. https://doi.org/10.1021/ja065813n