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Excitation‐Energy Migration in Self‐Assembled Cyclic Zinc( II )–Porphyrin Arrays: A Close Mimicry of a Natural Light‐Harvesting System
Author(s) -
Hwang InWook,
Park Mira,
Ahn Tae Kyu,
Yoon Zin Seok,
Ko Dah Mee,
Kim Dongho,
Ito Fuyuki,
Ishibashi Yukihide,
Khan Sazzadur R.,
Nagasawa Yutaka,
Miyasaka Hiroshi,
Ikeda Chusaku,
Takahashi Ryoichi,
Ogawa Kazuya,
Satake Akiharu,
Kobuke Yoshiaki
Publication year - 2005
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200500069
Subject(s) - mimicry , porphyrin , excitation , zinc , materials science , fluorescence , photochemistry , chemistry , chemical engineering , biophysics , optics , physics , biology , engineering , ecology , metallurgy , quantum mechanics
The excitation‐energy‐hopping (EEH) times within two‐dimensional cyclic zinc( II )–porphyrin arrays 5 and 6 , which were prepared by intermolecular coordination and ring‐closing metathesis reaction of olefins, were deduced by modeling the EEH process based on the anisotropy depolarization as well as the exciton–exciton annihilation dynamics. Assuming the number of energy‐hopping sites N =5 and 6, the two different experimental observables, that is, anisotropy depolarization and exciton–excition annihilation times, consistently give the EEH times of 8.0±0.5 and 5.3±0.6 ps through the 1,3‐phenylene linkages of 5 and 6 , respectively. Accordingly, the self‐assembled cyclic porphyrin arrays have proven to be well‐defined two‐dimensional models for natural light‐harvesting complexes.