Excitation energy migration in a dodecameric porphyrin box

In Wook Hwang, Zin Seok Yoon, Jiwon Kim, Taisuke Kamada, Tae Kyu Ahn, Naoki Aratani, Atsuhiro Osuka, Dongho Kim

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The excitation energy hopping (EEH) in a dodecameric porphyrin box (TB2) prepared by self-assembly of four meso-meso linked zinc(II) triporphyrin (T2)s is explored by picosecond fluorescence and femtosecond transient absorption (TA) spectroscopy. The exciton-exciton annihilation and anisotropy depolarization observed in both fluorescence and TA provide a consistent EEH rate, i.e. 300 ± 20 ps-1, assuming Förster energy hopping among four T2 units in TB2. The observed energy hopping time 300 ± 20 ps-1 is slower than the previous 98 ± 3 ps-1 of B2 (an octameric porphyrin box), even though the size of hopping unit is larger in TB2.

Original languageEnglish
Pages (from-to)130-139
Number of pages10
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume178
Issue number2-3 SPEC. ISS.
DOIs
Publication statusPublished - 2006 Mar 20

Fingerprint

Excitation energy
Porphyrins
porphyrins
Excitons
boxes
Fluorescence
Depolarization
Absorption spectroscopy
Self assembly
excitation
Zinc
Anisotropy
excitons
fluorescence
energy
depolarization
self assembly
absorption spectroscopy
zinc
anisotropy

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Physics and Astronomy(all)

Cite this

Hwang, In Wook ; Yoon, Zin Seok ; Kim, Jiwon ; Kamada, Taisuke ; Ahn, Tae Kyu ; Aratani, Naoki ; Osuka, Atsuhiro ; Kim, Dongho. / Excitation energy migration in a dodecameric porphyrin box. In: Journal of Photochemistry and Photobiology A: Chemistry. 2006 ; Vol. 178, No. 2-3 SPEC. ISS. pp. 130-139.
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abstract = "The excitation energy hopping (EEH) in a dodecameric porphyrin box (TB2) prepared by self-assembly of four meso-meso linked zinc(II) triporphyrin (T2)s is explored by picosecond fluorescence and femtosecond transient absorption (TA) spectroscopy. The exciton-exciton annihilation and anisotropy depolarization observed in both fluorescence and TA provide a consistent EEH rate, i.e. 300 ± 20 ps-1, assuming F{\"o}rster energy hopping among four T2 units in TB2. The observed energy hopping time 300 ± 20 ps-1 is slower than the previous 98 ± 3 ps-1 of B2 (an octameric porphyrin box), even though the size of hopping unit is larger in TB2.",
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Excitation energy migration in a dodecameric porphyrin box. / Hwang, In Wook; Yoon, Zin Seok; Kim, Jiwon; Kamada, Taisuke; Ahn, Tae Kyu; Aratani, Naoki; Osuka, Atsuhiro; Kim, Dongho.

In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 178, No. 2-3 SPEC. ISS., 20.03.2006, p. 130-139.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Excitation energy migration in a dodecameric porphyrin box

AU - Hwang, In Wook

AU - Yoon, Zin Seok

AU - Kim, Jiwon

AU - Kamada, Taisuke

AU - Ahn, Tae Kyu

AU - Aratani, Naoki

AU - Osuka, Atsuhiro

AU - Kim, Dongho

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AB - The excitation energy hopping (EEH) in a dodecameric porphyrin box (TB2) prepared by self-assembly of four meso-meso linked zinc(II) triporphyrin (T2)s is explored by picosecond fluorescence and femtosecond transient absorption (TA) spectroscopy. The exciton-exciton annihilation and anisotropy depolarization observed in both fluorescence and TA provide a consistent EEH rate, i.e. 300 ± 20 ps-1, assuming Förster energy hopping among four T2 units in TB2. The observed energy hopping time 300 ± 20 ps-1 is slower than the previous 98 ± 3 ps-1 of B2 (an octameric porphyrin box), even though the size of hopping unit is larger in TB2.

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