Ultrafast excited state dynamics in protonated GWG and GYG tripeptides

Literature Information

Publication Date 2006-10-18
DOI 10.1039/B613585D
Impact Factor 3.676
Authors

G. Grégoire, C. Dedonder-Lardeux, C. Jouvet, C. Desfrançois, J. A. Fayeton


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Abstract

The excited state dynamics of two protonated tripeptides GWG and GYG has been investigated by pump/probe femtosecond measurements on photofragments, to explore the behavior of peptides where the terminal protonated amino group is not directly linked to the aromatic residue. The dynamics observed are short and surprisingly similar to the dynamics observed on the free protonated tryptophan and tyrosine aromatic amino acids. Specific photofragments observed for protonated GWG are related to the formation of a radical species WG°+ after cleavage of the Cα–N bond near the tryptophan residue.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions. The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.

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