Intramolecular and intermolecular energy transfers in donor-acceptor linear porphyrin arrays

Hanju Rhee, Taiha Joo, Naoki Aratani, Atsuhiro Osuka, Sung Cho, Dongho Kim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We present highly time-resolved spontaneous fluorescence spectra of a porphyrin array system that consists of an energy donor and an acceptor linked by a phenyl group. The donors are meso-meso directly linked zinc(II) porphyrin arrays and the acceptor is a zinc (II) 5,15-di(phenylethynyl)porphyrin. The spectra over the entire Q (S1) emission band following the excitation of the donor B (S2) state have been measured directly without the conventional spectral reconstruction method. The time-resolved fluorescence spectra revealed detailed energy relaxation processes within the donor and subsequent energy transfer to the acceptor. The observed energy transfer rates to the acceptor are consistent with the Förster energy transfer rates calculated on the assumption that the energy is localized in the Q state of each porphyrin unit of the donor prior to the energy transfer. The passage of the energy deposited initially on one porphyrin unit of the donor to the acceptor illustrates a sequence of energy delocalization and localization processes before it finally reaches the acceptor.

Original languageEnglish
Article number074902
JournalJournal of Chemical Physics
Volume125
Issue number7
DOIs
Publication statusPublished - 2006 Aug 28

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Porphyrins
porphyrins
Energy transfer
energy transfer
Zinc
zinc
Fluorescence
energy
fluorescence
Relaxation processes
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Rhee, Hanju ; Joo, Taiha ; Aratani, Naoki ; Osuka, Atsuhiro ; Cho, Sung ; Kim, Dongho. / Intramolecular and intermolecular energy transfers in donor-acceptor linear porphyrin arrays. In: Journal of Chemical Physics. 2006 ; Vol. 125, No. 7.
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Intramolecular and intermolecular energy transfers in donor-acceptor linear porphyrin arrays. / Rhee, Hanju; Joo, Taiha; Aratani, Naoki; Osuka, Atsuhiro; Cho, Sung; Kim, Dongho.

In: Journal of Chemical Physics, Vol. 125, No. 7, 074902, 28.08.2006.

Research output: Contribution to journalArticle

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T1 - Intramolecular and intermolecular energy transfers in donor-acceptor linear porphyrin arrays

AU - Rhee, Hanju

AU - Joo, Taiha

AU - Aratani, Naoki

AU - Osuka, Atsuhiro

AU - Cho, Sung

AU - Kim, Dongho

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