کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5415817 | 1393778 | 2008 | 8 صفحه PDF | دانلود رایگان |
Two-photon resonant four-wave mixing spectroscopy has been utilized successfully for probing I and Iâ nascent from the 266Â nm photodissociations of various alkyl and perfluoroalkyl iodides. The relative quantum yields for Iâ, as well as the recoil anisotropy parameters, were extracted. Recoil anisotropy parameters close to the limit value for parallel transition indicates that the ground-state I(2P3/2) originates from the curve crossing from the initially prepared 3Q0 to 1Q1 state. The curve-crossing probabilities for alkyl and perfluoroalkyl iodides were obtained and tried to explain using the well-known Landau-Zener model. In the cases of perfluoroalkyl iodides, it is necessary to consider the fluorination effect to describe the detailed dynamics observed in this study and has been revealed that the electronic effect due to fluorine atom substitution is dominant, leading to decrease in the curve-crossing probability.
Journal: Journal of Molecular Spectroscopy - Volume 249, Issue 1, May 2008, Pages 43-50