title: [Study on laser flash spectroscopy of processes of photoionization of tyrosine: pH effects].
abstract: The processes of photoionization of tyrosine on three different pH value solutions were investigated by 248 nm laser flash photolysis. The results showed that the processes of photoionization of tyrosine were affected by pH value of the solution. With pH value increasing, the molecule number of photoionization increases via a monophotonic process, and decreases via a biphotonic process. Furthermore, the pH effect of photoionization of tyrosine resulting from deprotonation of phenolic hydroxyl group in alkaline solution was demonstrated.
authors.affiliation: Department of Chemical Physics, University of Science and Technology of China, 230026 Hefei.
authors.forename: Q
authors.initials: Q
authors.lastname: Song
authors.forename: H
authors.initials: H
authors.lastname: Sun
authors.forename: Q
authors.initials: Q
authors.lastname: Li
authors.forename: Y
authors.initials: Y
authors.lastname: Xu
authors.forename: C
authors.initials: C
authors.lastname: Chen
authors.forename: S
authors.initials: S
authors.lastname: Yu
authors.forename: X
authors.initials: X
authors.lastname: Ma
authors.forename: W
authors.initials: W
authors.lastname: Wang
authors.forename: S
authors.initials: S
authors.lastname: Yao
mesh_terms: D006863:Hydrogen-Ion Concentration; D007834:Lasers; D015394:Molecular Structure; D010777:Photochemistry; D013057:Spectrum Analysis / Q000379:methods*; D014443:Tyrosine / Q000737:chemistry*
chemical_list: D014443:Tyrosine