Thomas R. Rizzo

TL;DR: In this paper, a review presents a number of techniques employed in our laboratory and in others for measuring the spectroscopy of cold, gas-phase protonated peptides.

TL;DR: A new method to obtain electronic spectra of biomolecular ions that are produced in the gas phase by electrospray and cooled to approximately 10 K in a 22-pole ion trap is reported, and it is shown that a fast nonradiative process broadens the individual vibronic features, even upon excitation at the electronic band origin.

TL;DR: For doubly deuterated methane (CD2H2), this article showed that the reaction probability with two quanta of excitation in one C-H bond was greater (by as much as a factor of 5) than with one quantum in each of two c-H bonds.

TL;DR: The electronic spectrum of the amino acid tryptophan has been measured in the environment of a cold, supersonic molecular beam as discussed by the authors, and features characteristic of more volatile indole derivitives, however the region of the spectrum near the origin shows distinctive low frequency structure absent from the simpler indole containing molecules.

TL;DR: In this paper, the authors report 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.