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

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Ultrafast deactivation processes in aminopyridine clusters: Excitation energy dependence and isotope effects

Cited 12 times inthomson ciCited 17 times inthomson ci
Title
Ultrafast deactivation processes in aminopyridine clusters: Excitation energy dependence and isotope effects
Author
Samoylova, E.Smith, V. R.Ritze, H. -H.Radloff, W.Kabelac, M.Schultz, Thomas
Keywords
PROTON-TRANSFER PROCESSES; BASE-PAIRS; AB-INITIO; MOLECULAR-DYNAMICS; ADENINE-THYMINE; STATE; SPECTROSCOPY; 2-AMINOPYRIDINE; SELECTIVITY
Issue Date
200612
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.128, no.49, pp.1562 - 1565
Abstract
Fast excited-state relaxation in H-bonded aminopyridine clusters occurs via hydrogen transfer in the excited state. We used femtosecond pump-probe spectroscopy to characterize the excited-state reaction coordinate. Considerable isotope effects for partially deuterated clusters indicate that H-transfer is the rate-limiting step and validate ab initio calculations in the literature. A nonmonotonous dependence on the excitation energy, however, disagrees with the picture of a simple barrier along the reaction coordinate. An aminopyridine dimer serves as a model for Watson-Crick base pairs, where similar reactions have been predicted by theory.
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DOI
http://dx.doi.org/10.1021/ja0638612
ISSN
0002-7863
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