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Singlet and Triplet (π, π*) Excited States of Zinc(II) Octaalkylporphyrins: A Time-Resolved Resonance-Raman Study

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Time-Resolved Vibrational Spectroscopy VI

Part of the book series: Springer Proceedings in Physics ((SPPHY,volume 74))

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Abstract

The excited states of porphyrins and hydroporphyrins act as primary intermediates in processes ranging from biological energy transfer and electron transfer to photocatalysis and photodynamic therapy. We report resonance Raman (RR) spectra of the singlet S1 and triplet T1 excited states of zinc(II) octaethylporphyrin (ZnOEP) and zinc(II) etioporphyrin-I (ZnEtio), using picosecond and nanosecond RR techniques. Picosecond time-resolved resonance Raman experiments were performed using 532 nm photoexcitation pulses and 436 nm probe pulses (both 100 ps, 50 Hz); the experimental apparatus consisted of a mode-locked Nd:YAG laser (Coherent) in combination with a Nd:YAG regenerative amplifier (Continuum) and an H2 cell for stimulated Raman shifting. The apparatus used for nanosecond time-resolved RR experiments has been described previously [1]. Porphyrin samples were prepared in a nitrogen atmosphere at a concentration of 0.5 mM (tetrahydrofuran solvent).

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References

  1. Reed, R. A.; Purrello, Roberto; Prendergast, Kristine; Spiro, Thomas G. J. Phys. Chem. 1991, 95, 9720

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  2. Gouterman, M. in The Porphyrins; Dolphin, D.; Academic Press: New York 1978; Vol. III, Chapter 1 and references therein

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  3. Prendergast, K; Spiro, T. G. J. Phys. Chem. 1991, 95, 9728

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Authors and Affiliations

  1. Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA

    R. Kumble, G. R. Loppnow, S. Hu, S. E. Vitols & T. G. Spiro

Authors
  1. R. Kumble
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  2. G. R. Loppnow
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  3. S. Hu
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  4. S. E. Vitols
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  5. T. G. Spiro
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Editor information

Editors and Affiliations

  1. Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e. V., Rudower Chaussee 6, D-12474, Berlin, Germany

    Albrecht Lau  & Wolfgang Werncke  & 

  2. Institut für Biophysik und Strahlenbiologie, Albert-Ludwigs-Universität, Albertstrasse 23, D-79104, Freiburg, Germany

    Friedrich Siebert

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© 1994 Springer-Verlag Berlin Heidelberg

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Kumble, R., Loppnow, G.R., Hu, S., Vitols, S.E., Spiro, T.G. (1994). Singlet and Triplet (π, π*) Excited States of Zinc(II) Octaalkylporphyrins: A Time-Resolved Resonance-Raman Study. In: Lau, A., Werncke, W., Siebert, F. (eds) Time-Resolved Vibrational Spectroscopy VI. Springer Proceedings in Physics, vol 74. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85060-8_29

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  • DOI: https://doi.org/10.1007/978-3-642-85060-8_29

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-85062-2

  • Online ISBN: 978-3-642-85060-8

  • eBook Packages: Springer Book Archive

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