Characterizing the functional dynamics of zinc phthalocyanine from femtoseconds to nanoseconds

Janne Savolainen, Dennis van der Linden, Niels Dijkhuizen, Jennifer Lynn Herek

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Abstract

A promising photosensitizer, zinc phthalocyanine, is investigated by means of steady-state and time-resolved pump-probe spectroscopies. Spectrally resolved pump-probe data are recorded on time scales ranging from femtoseconds to nanoseconds. Global analysis yields the excited-state absorption spectra and lifetimes, as well as the pathways and efficiencies of the competing relaxation processes from the initially excited S1 state. In addition to the expected nanosecond-scale processes of fluorescence, internal conversion and inter-system crossing that follow the generally accepted kinetic scheme, we also resolve ultrafast dynamics. The nature of these fast processes and their implications to the functional pathway involving triplet formation are discussed.
Original languageUndefined
Pages (from-to)99-105
Number of pages7
JournalJournal of photochemistry and photobiology. A: Chemistry
Volume196
Issue number1
DOIs
Publication statusPublished - 2008

Keywords

  • IR-60475
  • METIS-248632

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