title: Detection and structural characterization of clusters with ultrashort-lived electronically excited states: IR absorption detected by femtosecond multiphoton ionization.
abstract: The vibrational fingerprint of the electronically excited short-lived complex of 1-H-pyrrolo[3,2-h]quinoline:methanol was measured using femtosecond multiphoton ionization detected infrared (IR/fsMPI) spectroscopy under supersonic jet conditions. A cyclic doubly hydrogen-bonded structure of the cluster has been proven from the comparison of the measured vibrational spectrum with that calculated with density functional theory. The employed nsIR-fsUV double resonance scheme is shown to be an effective tool for structural analysis of precursors that undergo fast deactivation and/or photoreactions.
authors.affiliation: Institute of Physical and Theoretical Chemistry, University of Frankfurt, Max-von-Laue-Str. 7, 60438 Frankfurt/M, Germany.
authors.forename: Yevgeniy
authors.initials: Y
authors.lastname: Nosenko
authors.forename: Maksim
authors.initials: M
authors.lastname: Kunitski
authors.forename: Randolph P
authors.initials: RP
authors.lastname: Thummel
authors.forename: Alexander
authors.initials: A
authors.lastname: Kyrychenko
authors.forename: Jerzy
authors.initials: J
authors.lastname: Herbich
authors.forename: Jacek
authors.initials: J
authors.lastname: Waluk
authors.forename: Christoph
authors.initials: C
authors.lastname: Riehn
authors.forename: Bernhard
authors.initials: B
authors.lastname: Brutschy