title: Photoionization-induced large-amplitude pendular motion in phenol(+)-Kr.
abstract: The dynamics of the intermolecular motion of the phenol(+)-Kr cation generated by photoionization of the neutral π-structure is probed by picosecond time-resolved infrared spectroscopy. The spectrum at zero delay displays only the free OH stretch band of the π-structure. The appearance of the hydrogen-bonded OH stretch band of the H-structure after a few ps is due to ionization-induced π → H site switching. Spectra at long delay (>20 ns) show that the Kr atom delocalizes from one π-site of the aromatic ring to the opposite π-site via the OH-site, like a pendular motion in the classical picture.
authors.affiliation: Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan.
authors.forename: Mitsuhiko
authors.initials: M
authors.lastname: Miyazaki
authors.forename: Akihiro
authors.initials: A
authors.lastname: Takeda
authors.forename: Shun-ichi
authors.initials: S
authors.lastname: Ishiuchi
authors.forename: Makoto
authors.initials: M
authors.lastname: Sakai
authors.forename: Otto
authors.initials: O
authors.lastname: Dopfer
authors.forename: Masaaki
authors.initials: M
authors.lastname: Fujii
mesh_terms: D007726:Krypton / Q000737:chemistry*; D009038:Motion; D019800:Phenol / Q000737:chemistry*; D055668:Photochemical Processes; D013056:Spectrophotometry, Ultraviolet
chemical_list: D019800:Phenol; D007726:Krypton