Intramolecular hydrogen transfer in the ionization process of α-alanine†
Abstract
Photoionization and dissociative photoionization of α-alanine have been studied with infrared laser desorption/tunable NH2+ ion derived from a direct C–C(O) bond cleavage. The photoionization
NH2+ is much stronger than that of the CH3ĊHNH3+ fragment. The formation of the CH3ĊHNH3+ and CH3CH
NH2+ ions is thought to be thermodynamically and kinetically favorable, respectively. Detailed formation pathways for the two