Formation and photofragmentation properties of isolated aromatic amino acid-silver cluster hybrids
LASIM, UMR CNRS 5579, Université Lyon 1, 69622 Villeurbanne, France
Corresponding author: a firstname.lastname@example.org
Published online: 24 January 2009
The formation of isolated [ (Trp-2H)+Ag9] + and [ (Tyr-2H)+Ag9] + amino-acid-Ag9 hybrids is reported. The photofragmentation yields of the aromatic amino acid-silver cluster hybrids, as well as those of the protonated tryptophan and tyrosine molecules ([Trp+H]+ and [Tyr+H]+) have been recorded. The fragmentation yields of the complexes are higher than the yields for [Trp+H]+ and [Tyr+H]+ and present an extension of the fragmentation on the red side of the spectrum. The photofragmentation spectrum of [ Trp+Ag9] + was recently reported [Mitric et al., J. Chem. Phys. 127, 134301 (2007)]. While the optical spectra of substituted [ (Trp-2H)+Ag9] + and non-substituted [ Trp+Ag9] + complexes are very similar, a strong modification of the fragmentation channels between the two complexes is observed. The fragmentation channels are sensitive to the type of bonding in aromatic amino acid-silver cluster hybrids and can be used as fingerprints of structures.
PACS: 32.30.Jc – Visible and ultraviolet spectra / 33.15.-e – Properties of molecules / 61.46.Bc – Structure of clusters
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2009