Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins

Spectrally resolved femtosecond three-pulse photon echo signal from some metal–octaethyl porphyrins (OEPs) like Zn(II)–OEP, Ni(II)–OEP, Co(II)–OEP is reported. Excited state dynamics is studied by time evolving photon echo spectra for different values of coherence and population relaxation times. De...

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Detalles Bibliográficos
Autores principales: Karthick Kumar, S.K., Tiwari, Vivek, Goswami, Tapas, Goswami, Debabrata
Formato: Texto
Lenguaje:English
Publicado: North Holland 2009
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2723920/
https://www.ncbi.nlm.nih.gov/pubmed/19693264
http://dx.doi.org/10.1016/j.cplett.2009.06.004
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author Karthick Kumar, S.K.
Tiwari, Vivek
Goswami, Tapas
Goswami, Debabrata
author_facet Karthick Kumar, S.K.
Tiwari, Vivek
Goswami, Tapas
Goswami, Debabrata
author_sort Karthick Kumar, S.K.
collection PubMed
description Spectrally resolved femtosecond three-pulse photon echo signal from some metal–octaethyl porphyrins (OEPs) like Zn(II)–OEP, Ni(II)–OEP, Co(II)–OEP is reported. Excited state dynamics is studied by time evolving photon echo spectra for different values of coherence and population relaxation times. Dependence on the spectrally resolved photon echo spectra on varying metal center is analyzed. For all these metallo-porphyrins, the electronic relaxation timescale is found to be limited by our laser pulsewidth of 50 fs whereas the timescale for intramolecular vibrational relaxation, occurring within the Q(00) band was found to be over a picosecond for Co(II)–OEP and Ni(II)–OEP and within a picosecond for Zn(II)–OEP.
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spelling pubmed-27239202009-08-18 Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins Karthick Kumar, S.K. Tiwari, Vivek Goswami, Tapas Goswami, Debabrata Chem Phys Lett Article Spectrally resolved femtosecond three-pulse photon echo signal from some metal–octaethyl porphyrins (OEPs) like Zn(II)–OEP, Ni(II)–OEP, Co(II)–OEP is reported. Excited state dynamics is studied by time evolving photon echo spectra for different values of coherence and population relaxation times. Dependence on the spectrally resolved photon echo spectra on varying metal center is analyzed. For all these metallo-porphyrins, the electronic relaxation timescale is found to be limited by our laser pulsewidth of 50 fs whereas the timescale for intramolecular vibrational relaxation, occurring within the Q(00) band was found to be over a picosecond for Co(II)–OEP and Ni(II)–OEP and within a picosecond for Zn(II)–OEP. North Holland 2009-07-07 /pmc/articles/PMC2723920/ /pubmed/19693264 http://dx.doi.org/10.1016/j.cplett.2009.06.004 Text en © 2009 Elsevier B.V. https://creativecommons.org/licenses/by/3.0/ Open Access under CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/) license
spellingShingle Article
Karthick Kumar, S.K.
Tiwari, Vivek
Goswami, Tapas
Goswami, Debabrata
Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins
title Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins
title_full Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins
title_fullStr Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins
title_full_unstemmed Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins
title_short Spectrally resolved photon echo spectroscopy of Zn(II), Co(II) and Ni(II)–octaethyl porphyrins
title_sort spectrally resolved photon echo spectroscopy of zn(ii), co(ii) and ni(ii)–octaethyl porphyrins
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2723920/
https://www.ncbi.nlm.nih.gov/pubmed/19693264
http://dx.doi.org/10.1016/j.cplett.2009.06.004
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