Ultrafast decay dynamics of photoexcited Cu(II)(TMpy-P4) in water solvent

Sae Chae Jeoung, Satoshi Takeuchi, Tahei Tahara, Dongho Kim

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Femtosecond time-resolved absorption spectroscopy was employed to investigate the relaxation dynamics of photoexcited copper(II) tetrakis (4-N-methylpyridyl)porphyrin (Cu(II)(TMpy-P4)) in neat water. The transient absorption spectra and their temporal profiles show a strong pump-power dependence reflecting multiphoton ionization of water, which probably caused the discrepancies in the previous reports. Time-resolved transient absorption spectra were recorded under low pump-power condition to avoid the multiphoton effect. It was confirmed that the relaxation process finishes within 100 ps, exhibiting the double exponential recovery of Cu(II)(TMpy-P4) ground state. The relevant mechanism for the relaxation dynamics of photoexcited Cu(II)(TMpy-P4) in water was proposed.

Original languageEnglish
Pages (from-to)369-376
Number of pages8
JournalChemical Physics Letters
Volume309
Issue number5-6
DOIs
Publication statusPublished - 1999 Aug 20

Fingerprint

Water
Absorption spectra
decay
Pumps
pumps
water
absorption spectra
Porphyrins
Relaxation processes
Absorption spectroscopy
porphyrins
Ground state
Ionization
Copper
absorption spectroscopy
recovery
Recovery
ionization
copper
ground state

All Science Journal Classification (ASJC) codes

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

Cite this

Jeoung, Sae Chae ; Takeuchi, Satoshi ; Tahara, Tahei ; Kim, Dongho. / Ultrafast decay dynamics of photoexcited Cu(II)(TMpy-P4) in water solvent. In: Chemical Physics Letters. 1999 ; Vol. 309, No. 5-6. pp. 369-376.
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Ultrafast decay dynamics of photoexcited Cu(II)(TMpy-P4) in water solvent. / Jeoung, Sae Chae; Takeuchi, Satoshi; Tahara, Tahei; Kim, Dongho.

In: Chemical Physics Letters, Vol. 309, No. 5-6, 20.08.1999, p. 369-376.

Research output: Contribution to journalArticle

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AU - Takeuchi, Satoshi

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