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Reply to the Comment on “Resonance Raman Investigation of Ru(phen)_2dppz^(2+) and Related Complexes in Water and in the Presence of DNA”

Chen, Wei and Turro, Claudia and Friedman, Lee A. and Barton, Jacqueline K. and Turro, Nicholas J. (1998) Reply to the Comment on “Resonance Raman Investigation of Ru(phen)_2dppz^(2+) and Related Complexes in Water and in the Presence of DNA”. Journal of Physical Chemistry B, 102 (32). p. 6303. ISSN 1520-6106. https://resolver.caltech.edu/CaltechAUTHORS:20180719-163630672

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Abstract

Our recent paper describes the rR spectra of Ru(phen)_2dppz^(2+), Ru(phen)_2(F_2-dppz)^(2+), and Os(phen)_2(dppz)^(2+) (phen = 1,10-phenanthroline, dppz = dipyrido[3,2-a:2‘,3‘-d]phenazine, F_2-dppz = 7,8-difluoro-dppz) obtained utilizing 354.7 nm excitation (fwhm ∼ 10 ns). The spectra collected for Ru(phen)_2(F_2-dppz)^(2+) and Os(phen)_2(dppz)^(2+) were assigned to the ground state of the complexes at both high and low pulse energies. In the case of Ru(phen)_2dppz^(2+), the power dependence of the peaks at 1365 and 1453 cm^(-1) were consistent with an excited state. Our interpretation described below and on the recent paper was not based on the assumption that the ^3ππ* state of the dppz ligand lies below the MLCT in Ru(phen)_2dppz^(2+), but rather that pumping directly into the dppz ^1ππ* manifold could lead to trapping of the excitation at short time scales on the lowest LC dppz state (^3ππ*) if crossing to the MLCT required activation. Lowering of the MLCT relative to the ^3ππ* in Ru(phen)_2(F_2-dppz)^(2+) and Os(phen)_2(dppz)^(2+) would result in lowering the activation barrier and much faster crossing to the MLCT.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://dx.doi.org/10.1021/jp9817123DOIArticle
ORCID:
AuthorORCID
Barton, Jacqueline K.0000-0001-9883-1600
Alternate Title:Reply to the Comment on “Resonance Raman Investigation of Ru(phen)2dppz2+ and Related Complexes in Water and in the Presence of DNA”
Additional Information:© 1998 American Chemical Society. Received: March 30, 1998; In Final Form: June 4, 1998.
Issue or Number:32
Record Number:CaltechAUTHORS:20180719-163630672
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180719-163630672
Official Citation:Reply to the Comment on “Resonance Raman Investigation of Ru(phen)2dppz2+ and Related Complexes in Water and in the Presence of DNA” Wei Chen, Claudia Turro, Lee A. Friedman, Jacqueline K. Barton, and Nicholas J. Turro The Journal of Physical Chemistry B 1998 102 (32), 6303-6303 DOI: 10.1021/jp9817123
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:88044
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:23 Jul 2018 16:08
Last Modified:03 Oct 2019 20:02

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