B. Bellina, I. Compagnon, S. Houver, P. Maître, A.-R. Allouche, R. Antoine, P. Dugourd
Angew. Chem. Int. Ed. (2011). DOI

Travail réalisé sur le site de l’Université Paris Sud.

Abstract

Mellow yellow : The canonical form of the tryptophan radical cation embedded in an isolated polypeptide shows a distinctive absorption in the yellow region of the spectrum, in contrast with the neutral radical form, which shows an absorption in the blue region (see picture). The spectroscopic diagnostic was supported by vibrational spectroscopy (IRMPD), time-dependent density functional theory, and multireference perturbation theory.