Time-resolved Raman spectroscopy of excited-state porphyrins

Steven E.J. Bell; Ala H.R. Al-Obaidi; Martin Hegarty; Colin Lefly; Ronald E. Hester; John J. McGarvey

doi:10.1117/12.146128

17 June 1993 Time-resolved Raman spectroscopy of excited-state porphyrins

Steven E.J. Bell, Ala H.R. Al-Obaidi, Martin Hegarty, Colin Lefly, Ronald E. Hester, John J. McGarvey

Proceedings Volume 1921, Laser Spectroscopy of Biomolecules; (1993) https://doi.org/10.1117/12.146128
Event: Laser Spectroscopy of Biomolecules: 4th International Conference on Laser Applications in Life Sciences, 1992, Jyvaskyla, Finland

Abstract

Time-resolved resonance Raman spectroscopy has been used to probe the lowest excited singlet and triplet states of free-base meso-tetraarylporphyrins. Both single-color and two-color time-resolved techniques have been used to probe the excited singlet states, while the triplet spectra were obtained in two-color experiments with a time-delay between pump and probe lasers of 30 ns. Marker bands for each of these three states have been identified. The information which qualitative analysis of the Raman spectra can give on the structural differences between these excited states is discussed.

Citation Download Citation

Steven E.J. Bell, Ala H.R. Al-Obaidi, Martin Hegarty, Colin Lefly, Ronald E. Hester, and John J. McGarvey "Time-resolved Raman spectroscopy of excited-state porphyrins", Proc. SPIE 1921, Laser Spectroscopy of Biomolecules, (17 June 1993); https://doi.org/10.1117/12.146128

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