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

All Science Journal Classification (ASJC) codes

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

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