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Femtosecond dynamics of metalloporphyrins: electron transfer and energy redistribution

Yu, H. Z. and Baskin, J. S. and Steiger, B. and Wan, C. Z. and Anson, F. C. and Zewail, A. H. (1998) Femtosecond dynamics of metalloporphyrins: electron transfer and energy redistribution. Chemical Physics Letters, 293 (1-2). pp. 1-8. ISSN 0009-2614. https://resolver.caltech.edu/CaltechAUTHORS:20160823-144514367

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Abstract

Femtosecond-resolved, real-time dynamics of the low-lying excited state ^2Q(π,π^*) of cobalt(II) tetraphenylporphyrin are reported in different solvents of varying polarity and structure. The dependence of the dynamics on the probing wavelength and on the metal and porphyrin substitution was also investigated. The decay in the π system of the porphyrin occurs with a lifetime of 220 fs in benzene, while a second process with a lifetime of 1.8 ps is consistent with a proposed model for intramolecular charge separation: porphyrin a_(2u)(π)→Co(d_z^2). The dynamics of the charge transfer state is influenced by the solvents' polarity and coordination ability.


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http://dx.doi.org/10.1016/S0009-2614(98)00753-2DOIArticle
http://www.sciencedirect.com/science/article/pii/S0009261498007532PublisherArticle
Additional Information:© 1998 Elsevier Science B.V. Received 25 May 1998. Available online 16 September 1998. This work was supported by the National Science Foundation (Laboratory for Molecular Sciences).
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Issue or Number:1-2
Record Number:CaltechAUTHORS:20160823-144514367
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20160823-144514367
Official Citation:H.Z Yu, J.S Baskin, B Steiger, C.Z Wan, F.C Anson, A.H Zewail, Femtosecond dynamics of metalloporphyrins: electron transfer and energy redistribution, Chemical Physics Letters, Volume 293, Issues 1–2, 21 August 1998, Pages 1-8, ISSN 0009-2614, http://dx.doi.org/10.1016/S0009-2614(98)00753-2. (http://www.sciencedirect.com/science/article/pii/S0009261498007532)
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ID Code:69858
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:23 Aug 2016 23:32
Last Modified:03 Oct 2019 10:26

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