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Cover Picture: Spatiotemporal Kinetics in Solution Studied by Time-Resolved X-Ray Liquidography (Solution Scattering) (ChemPhysChem 12/2009)
The cover picture illustrates the technique of time-resolved X-ray liquidography (solution scattering), a direct tool to probe structural dynamics and spatiotemporal kinetics of solution-phase reactions. Picosecond optical pulses (red line) trigger a chemical reaction in a solution and 100 ps long X-ray pulses (cyan line) from a synchrotron probe the evolving structures of transient species over picoseconds to microseconds. Molecules ranging from small molecules to organometallic complexes, nanoparticles and proteins are studied. In the corners are shown time-dependent difference scattering patterns for the iodine elimination reaction of 1,2-diiodoethane (C2H4I2) in a methanol solution, along with the associated major transient structures identified via data analysis. On page 1958 H. Ihee et al. review experimental and theoretical approaches, application examples and future perspectives for femtosecond applications of this technique.