title: Geometry changes of a Cu(I) phenanthroline complex on photoexcitation in a confining medium by time-resolved X-ray diffraction.
abstract: Using a stroboscopic technique, in which the molecule is repeatedly excited and the structural change is probed more than 5000 times per second immediately after excitation, we performed a 16 K time-resolved single-crystal study of the microsecond lifetime triplet state of the Cu(I)phenanthroline derivative[Cu(I)(dmp)(dppe)][PF6] (dppe = 1,2-bis(diphenylphosphino)ethane). The geometry changes on excitation differ for the two symmetry-independent molecules, but are in the same direction as calculated for an isolated reference molecule, although the flattening distortion in the crystal is significantly smaller, implying that the reorganization energy is greatly affected by the confining medium.
authors.affiliation: Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260, USA. coppens@buffalo.edu
authors.forename: Philip
authors.initials: P
authors.lastname: Coppens
authors.forename: Ivan I
authors.initials: II
authors.lastname: Vorontsov
authors.forename: Timothy
authors.initials: T
authors.lastname: Graber
authors.forename: Andrey Yu
authors.initials: AY
authors.lastname: Kovalevsky
authors.forename: Yu-Sheng
authors.initials: YS
authors.lastname: Chen
authors.forename: Guang
authors.initials: G
authors.lastname: Wu
authors.forename: Milan
authors.initials: M
authors.lastname: Gembicky
authors.forename: Irina V
authors.initials: IV
authors.lastname: Novozhilova