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25 April 2024 |
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Visualizing chemical reactions in solution by picosecond x-ray diffraction | | Anton Plech
; Michael Wulff
; Savo Bratos
; Fabien Mirloup
; Rodolphe Vuilleumier
; Friedrich Schotte
; Philip A Anfinrud
; | | Date: |
26 Mar 2004 | | Journal: | Phys Rev Lett, 92 (12), 125505 | | Abstract: | We present a time-resolved x-ray diffraction study to monitor the recombination of laser-dissociated iodine molecules dissolved in CCl4. The change in structure of iodine is followed during the whole recombination process. The deexcitation of solute molecules produces a heating of the solvent and induces tiny changes in its structure. The variations in the distance between pairs of chlorine atoms in adjacent CCl4 molecules are probed on the mA length scale. However, the most striking outcome of the present work is the experimental determination of temporally varying atom-atom pair distribution functions. Variations of the mean density of the solution during thermal expansion are also followed in real time. One concludes that not only time-resolved optical spectroscopy but also time-resolved x-ray diffraction can be used to monitor atomic motions in liquids. | | Source: | PubMed, pmid15089686 | | Services: | Forum | Review | Favorites | |
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