BROWSE

Related Researcher

Author

Schultz, Thomas
CRASY(Correlated Rotational Alignment Spectroscopy)
Research Interests
  • Correlated spectroscopy

ITEM VIEW & DOWNLOAD

Excited state dynamics and fragmentation channels of the protonated dipeptide H2N-Leu-Trp-COOH

Cited 21 times inthomson ciCited 17 times inthomson ci
Title
Excited state dynamics and fragmentation channels of the protonated dipeptide H2N-Leu-Trp-COOH
Author
Nolting, DirkSchultz, ThomasHertel, I. V.Weinkauf, Rainer
Keywords
AROMATIC-AMINO-ACIDS; GAS-PHASE; MASS-SPECTROMETRY; AB-INITIO; FLUORESCENCE DECAY; SMALL PEPTIDES; PHOTOINDUCED DISSOCIATION; TRYPTOPHAN CONFORMERS; ELECTRONIC-SPECTRUM; SPECTROSCOPY
Issue Date
2006
Publisher
ROYAL SOC CHEMISTRY
Citation
PHYSICAL CHEMISTRY CHEMICAL PHYSICS, v.8, no.44, pp.5247 - 5254
Abstract
The excited state dynamics of the isolated and protonated peptide H 2N-Leu-Trp-COOH are analyzed by fs pump-probe spectroscopy. The peptides are brought into the gas phase by electrospray ionization, and fs pump-probe excitation is detected by fragment ion formation. The pump laser addressed the excited ππ* state of the indole chromophore of the amino acid tryptophan. The subsequent excited state dynamics agreed with a biexponential decay with time constants of 500 fs and 10 ps. This is considerably shorter than the lifetime of neutral tryptophan in solution and in proteins, but similar to isolated, protonated tryptophan. Several models are discussed to explain the experimental results but the detailed quenching mechanism remains unresolved.
URI
Go to Link
DOI
http://dx.doi.org/10.1039/b609726j PubMed ID: 17203149Document Type: Article
ISSN
1463-9076
Appears in Collections:
SNS_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU