Valence-bond non-equilibrium solvation model for a twisting monomethine cyanine

The Journal of Chemical Physics
Sean McConnellSeth Olsen

Abstract

We propose and analyze a two-state valence-bond model of non-equilibrium solvation effects on the excited-state twisting reaction of monomethine cyanines. Suppression of this reaction is thought responsible for environment-dependent fluorescence yield enhancement in these dyes. Fluorescence is quenched because twisting is accompanied via the formation of dark twisted intramolecular charge-transfer (TICT) states. For monomethine cyanines, where the ground state is a superposition of structures with different bond and charge localizations, there are two possible twisting pathways with different charge localizations in the excited state. For parameters corresponding to symmetric monomethines, the model predicts two low-energy twisting channels on the excited-state surface, which leads to a manifold of TICT states. For typical monomethines, twisting on the excited state surface will occur with a small barrier or no barrier. Changes in the solvation configuration can differentially stabilize TICT states in channels corresponding to different bonds, and that the position of a conical intersection between adiabatic states moves in response to solvation to stabilize either one channel or the other. There is a conical intersection seam ...Continue Reading

References

Dec 1, 1993·Proceedings of the National Academy of Sciences of the United States of America·C B Gorman, S R Marder
Feb 25, 2003·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Damien LaageJames T Hynes
Oct 9, 2004·Faraday Discussions·Irene BurghardtJames T Hynes
Nov 1, 1939·Proceedings of the National Academy of Sciences of the United States of America·L Pauling
Jun 10, 2006·Physical Chemistry Chemical Physics : PCCP·Zahra AziziValera Veryazov
Oct 6, 2006·The Journal of Physical Chemistry. a·Irene Burghardt, James T Hynes
Feb 13, 2007·Annual Review of Physical Chemistry·Benjamin G Levine, Todd J Martínez
Apr 10, 2007·The Journal of Physical Chemistry. B·Benjamin DietzekAlexander N Tarnovsky
Apr 25, 2007·The Journal of Physical Chemistry. B·Benjamin DietzekArkady Yartsev
Nov 18, 2008·The Journal of Physical Chemistry. a·Joshua D CoeTodd J Martínez
Dec 19, 2008·The Journal of Physical Chemistry. B·Aaron M VirshupTodd J Martínez
Sep 5, 2009·Journal of the American Chemical Society·Martial Boggio-PasquaGerrit Groenhof
Sep 17, 2010·Journal of Biological Engineering·Mark A Haidekker, Emmanuel A Theodorakis
Sep 24, 2010·The Journal of Physical Chemistry. B·Minako KondoStephen R Meech
Oct 12, 2010·The Journal of Physical Chemistry. a·João Pedro MalhadoJames T Hynes
Jan 12, 2011·Annual Review of Physical Chemistry·Spiridoula Matsika, Pascal Krause
Mar 9, 2011·The Journal of Physical Chemistry. a·Nadav AmdurskyDan Huppert
Mar 15, 2011·Langmuir : the ACS Journal of Surfaces and Colloids·Anthony BaldridgeLaren M Tolbert
Mar 18, 2011·ACS Combinatorial Science·Anthony BaldridgeLaren M Tolbert
Apr 13, 2011·Biochemistry·Catherine C KittsBengt Nordén
Jun 30, 2011·The Journal of Physical Chemistry. a·Yuval ErezDan Huppert
Jul 30, 2011·Science·Jeremy S PaigeSamie R Jaffrey
Jun 14, 2012·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Cristina SissaAnna Painelli
Jun 29, 2012·Accounts of Chemical Research·Nadav AmdurskyDan Huppert
Nov 7, 2012·The Journal of Chemical Physics·Seth Olsen, Ross H McKenzie

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