A full multiple scattering model for the analysis of time-resolved X-ray difference absorption spectra.
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.
Benfatto
Maurizio
M
Laboratori Nazionali di Frascati, INFN, CP13, I-00044 Frascati, Italy.
Della Longa
Stefano
S
Hatada
Keisuke
K
Hayakawa
Kuniko
K
Gawelda
Wojciech
W
Bressler
Christian
C
Chergui
Majed
M
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
D008024:Ligands; D009942:Organometallic Compounds; D012428:Ruthenium