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Recombination of photodissociated iodine: A time-resolved x-ray-diffraction study.
- Source :
- Journal of Chemical Physics; 1/21/2006, Vol. 124 Issue 3, p034501-1-034501-13, 13p, 2 Diagrams, 1 Chart, 11 Graphs
- Publication Year :
- 2006
-
Abstract
- A time-resolved x-ray-diffraction experiment is presented that aims to study the recombination of laser-dissociated iodine molecules dissolved in CCl<subscript>4</subscript>. This process is monitored over an extended time interval from pico- to microseconds. The variations of atom-atom distances are probed with a milliangstrom resolution. A recent theory of time-resolved x-ray diffraction is used to analyze the experimental data; it employs the correlation function approach of statistical mechanics. The most striking outcome of this study is the experimental determination of time-dependent I–I atom-atom distribution functions. The structure of the CCl<subscript>4</subscript> solvent changes simultaneously; the solvent thus appears as a reaction partner rather than an inert medium hosting it. Thermal expansion of the system is nonuniform in time, an effect due to the presence of the acoustic horizon. One concludes that a time-resolved x-ray diffraction permits real-time visualization of solvent and solute motions during a chemical reaction. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00219606
- Volume :
- 124
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Journal of Chemical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 19529532
- Full Text :
- https://doi.org/10.1063/1.2149852