An electronic time scale in chemistry.

Proceedings of the National Academy of Sciences of the United States of America
F Remacle, R D Levine

Abstract

Ultrafast, subfemtosecond charge migration in small peptides is discussed on the basis of computational studies and compared with the selective bond dissociation after ionization as observed by Schlag and Weinkauf. The reported relaxation could be probed in real time if the removal of an electron could be achieved on the attosecond time scale. Then the mean field seen by an electron would be changing rapidly enough to initiate the migration. Tyrosine-terminated tetrapeptides have a particularly fast charge migration where in <1 fs the charge arrives at the other end. A femtosecond pulse can be used to observe the somewhat slower relaxation induced by correlation between electrons of different spins. A slower relaxation also is indicated when removing a deeper-lying valence electron. When a chromophoric amino acid is at one end of the peptide, the charge can migrate all along the peptide backbone up to the N end, but site-selective ionization is probably easier to detect for tryptophan than for tyrosine.

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Citations

Jul 3, 2013·Journal of the American Society for Mass Spectrometry·Martin J DuffyJason B Greenwood
Feb 23, 2012·Physical Chemistry Chemical Physics : PCCP·O González-MagañaT Schlathölter
May 23, 2013·Physical Chemistry Chemical Physics : PCCP·Matthias F KlingRegina de Vivie-Riedle
Oct 7, 2009·Proceedings of the National Academy of Sciences of the United States of America·Olga SmirnovaMisha Yu Ivanov
Jul 4, 2012·Proceedings of the National Academy of Sciences of the United States of America·Gopal DixitRobin Santra
Jun 21, 2008·Science·E GoulielmakisU Kleineberg
Mar 17, 2012·Science·Markus Gühr
Nov 23, 2007·Annual Review of Physical Chemistry·Matthias F Kling, Marc J J Vrakking
Jan 29, 2009·The Journal of Chemical Physics·Alexander I Kuleff, Andreas Dreuw
Aug 3, 2012·The Review of Scientific Instruments·F FrankJ W G Tisch
Apr 12, 2013·The Journal of Chemical Physics·Gopal Dixit, Robin Santra
Mar 13, 2012·Annual Review of Physical Chemistry·Lukas GallmannUrsula Keller
Mar 5, 2016·The Review of Scientific Instruments·F CampiP Johnsson
Sep 12, 2015·Nano Letters·Shuo DongZhi-Heng Loh
Apr 6, 2016·The Journal of Physical Chemistry. a·Gunter HermannJean Christophe Tremblay
Mar 17, 2016·Annual Review of Physical Chemistry·Krupa RamaseshaDaniel M Neumark
Jun 18, 2016·The Journal of Physical Chemistry. B·Sherin JoyGanga Periyasamy
Apr 22, 2017·Physical Chemistry Chemical Physics : PCCP·Daniel DundasAlejandro de la Calle
Dec 17, 2015·Physical Chemistry Chemical Physics : PCCP·Masahiro YamakiYuichi Fujimura
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Oct 7, 2016·Faraday Discussions·Stephen R Leone, Daniel M Neumark
Oct 11, 2016·Faraday Discussions·Pierre ÇarçabalRaluca Cireasa
Sep 22, 2017·Physical Chemistry Chemical Physics : PCCP·Kai-Jun Yuan, André D Bandrauk

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