title: A full multiple scattering model for the analysis of time-resolved X-ray difference absorption spectra.
abstract: A full multiple theoretical model (MXAN) is applied to fit picosecond difference X-ray absorption spectra at the ruthenium L(3) edge upon photoexcitation of aqueous [RuII(bpy)3]2+. We show that fitting difference spectra allows an increase in sensitivity, such that slight structural changes can be retrieved, which are not detected in fitting full spectra. The Ru-N bond distances of the excited complex in the (3)MLCT state are in good agreement with recently published values. The implementation of the present approach to L-edge spectra and its high sensitivity opens opportunities for its extension to a large class of experiments where difference X-ray absorption spectra are recorded.
authors.affiliation: Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy.
authors.forename: Maurizio
authors.initials: M
authors.lastname: Benfatto
authors.forename: Stefano
authors.initials: S
authors.lastname: Della Longa
authors.forename: Keisuke
authors.initials: K
authors.lastname: Hatada
authors.forename: Kuniko
authors.initials: K
authors.lastname: Hayakawa
authors.forename: Wojciech
authors.initials: W
authors.lastname: Gawelda
authors.forename: Christian
authors.initials: C
authors.lastname: Bressler
authors.forename: Majed
authors.initials: M
authors.lastname: Chergui
mesh_terms: D008024:Ligands; D008956:Models, Chemical; D009942:Organometallic Compounds / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis; D013997:Time Factors; D014965:X-Rays
chemical_list: D008024:Ligands; D009942:Organometallic Compounds; D012428:Ruthenium