Electronic and Molecular Structure of Photoexcited [RuII(bpy)3]2+Probed by Picosecond X-ray Absorption Spectroscopy
Citations Over TimeTop 10% of 2006 papers
Abstract
L(2,3) X-ray absorption spectra of aqueous [Ru(II)(bpy)3]2+ have been recorded in its ground and excited states, 50 ps after short pulse laser excitation. Significant changes in both the XANES (X-ray Near-Edge Absorption Structure) and the EXAFS (Extended X-ray Absorption Fine Structure) regions of the excited state complex are detected. The XANES line shapes have been quantitatively simulated using a crystal field multiplet code in trigonal symmetry. In addition, spectral changes in the EXAFS region of both ground and excited states are analyzed in order to extract structural parameters of their corresponding molecular structures. We obtain a Ru-N bond contraction by approximately 0.03 angstroms in the excited-state complex, as compared to the ground-state compound. This contraction results from electrostatic and polarization contributions, limited by steric constraints on the bpy ligands.
Related Papers
- → Comparative analysis of XANES and EXAFS for local structural characterization of disordered metal oxides(2021)28 cited
- → Investigation of Co nanoparticles with EXAFS and XANES(2004)75 cited
- → Determination of the Mo surface environment of Mo/TiO2 catalysts by EXAFS, XANES and PCA(1992)43 cited
- → Effects of Precursor Composition on the Local Structure of Cu Dispersed on Mesoporous Silica: A Detailed X-ray Absorption Spectroscopy Study(2004)37 cited
- → Investigation of the ‘‘join’’ between the near edge and extended x-ray absorption fine structure(1990)21 cited