Publications de Sébastien Mercier

Electronic and vibrational spectroscopy of cold protonated amino acids in the gas phase

In this thesis report, we describe a novel home-built instrument designed to study the spectroscopy of biomolecular ions in the gas phase and at low temperature, and we present the first experimental results obtained on protonated aromatic amino acids. The ...

EPFL2008

Conformation-specific spectroscopy and photodissociation of cold, protonated tyrosine and phenylalanine

Thomas Rizzo, Oleg Boyarkine, Monia Guidi, Sébastien Mercier, Caroline Seaiby

We present here ultraviolet and infrared spectra of protonated aromatic amino acids in a cold, 22-pole ion trap. Ultraviolet photofragmentation spectra of protonated tyrosine and phenylalanine show vibronically resolved bands corresponding to different sta ...

2007

Infrared spectroscopy of hydrated amino acids in the gas phase: protonated and lithiated valine

Thomas Rizzo, Rainer Beck, Oleg Boyarkine, Sébastien Mercier, Anthi Kamariotou, Evan Rowland Williams

We report here infrared spectra of protonated and lithiated valine with varying degrees of hydration in the gas phase and interpret them with the help of DFT calculations at the B3LYP/6-31++G** level. In both the protonated and lithiated species, our resul ...

2006

Microsolvation effects on the excited state dynamics of protonated tryptophan

Ursula Röthlisberger, Thomas Rizzo, Ivano Tavernelli, Oleg Boyarkine, Sébastien Mercier, Michele Cascella, Matteo Guglielmi, Anthi Kamariotou

To better understand the complex photophysics of the amino acid tryptophan, which is widely used as a probe of protein structure and dynamics, we have measured electronic spectra of protonated, gas-phase tryptophan solvated with a controlled number of wate ...

2006

Electronic spectroscopy of cold, protonated tryptophan and tyrosine

Thomas Rizzo, Oleg Boyarkine, Sébastien Mercier, Anthi Kamariotou

We report here a new method to obtain electronic spectra of biomolecular ions that are produced in the gas phase by electrospray and cooled to ~10K in a 22-pole ion trap, and we demonstrate this technique by applying it to protonated tryptophan and tyrosin ...

2006