title: Ultrafast structural dynamics of photochromic indolylfulgimides studied by vibrational spectroscopy and DFT calculations.
abstract: The structural dynamics of the ring-opening reaction in a photochromic indolylfulgimide, a reversible, ultrafast photoswitch, is investigated by ultra-broadband time-resolved vibrational spectroscopy. The experimentally observed vibrational modes of the indolylfulgimide photoisomers C and E are assigned to normal modes with the help of DFT calculations. A complete evaluation of the observed vibrational dynamics including excited-state vibrational modes is used to characterize the reaction path and the cooling behavior of the photoswitch.
authors.affiliation: BioMolekulare Optik, Department Physik, Ludwig-Maximilians-Universität München, Oettingenstrasse 67, D-80538 München, Germany.
authors.forename: Florian O
authors.initials: FO
authors.lastname: Koller
authors.forename: Wolfgang J
authors.initials: WJ
authors.lastname: Schreier
authors.forename: Tobias E
authors.initials: TE
authors.lastname: Schrader
authors.forename: Arne
authors.initials: A
authors.lastname: Sieg
authors.forename: Stephan
authors.initials: S
authors.lastname: Malkmus
authors.forename: Christine
authors.initials: C
authors.lastname: Schulz
authors.forename: Steffen
authors.initials: S
authors.lastname: Dietrich
authors.forename: Karola
authors.initials: K
authors.lastname: Rück-Braun
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Zinth
authors.forename: Markus
authors.initials: M
authors.lastname: Braun
mesh_terms: D000465:Algorithms; D007211:Indoles / Q000737:chemistry*; D007536:Isomerism; D015394:Molecular Structure; D010777:Photochemistry; D013056:Spectrophotometry, Ultraviolet; D013388:Succinimides / Q000737:chemistry*
chemical_list: D007211:Indoles; C517403:N-methylindolylfulgimide; D013388:Succinimides