An Electronic Time Scale in Chemistry

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 co...

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Bibliographic Details
Published in:Proceedings of the National Academy of Sciences - PNAS 2006-05, Vol.103 (18), p.6793-6798
Main Authors: Remacle, F., Levine, R. D.
Format: Article
Language:English
Subjects:
Atoms
Cations
Chemistry
Chimie
Electrons
Energy
Ionization
Ions
Ions - chemistry
Mathematics
Molecular Structure
Molecules
Orbitals
Peptides
Peptides - chemistry
Physical Sciences
Physical, chemical, mathematical & earth Sciences
Physique, chimie, mathématiques & sciences de la terre
Potential energy
Spectrum analysis
Stationary orbits
Time Factors
Tryptophan - chemistry
Tyrosine - chemistry
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Summary: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
ISSN:0027-8424
1091-6490
1091-6490
DOI:10.1073/pnas.0601855103