A deep UV trigger for ground-state ring-opening dynamics of 1,3-cyclohexadiene
| العنوان: | A deep UV trigger for ground-state ring-opening dynamics of 1,3-cyclohexadiene |
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| المؤلفون: | Sergio Carbajo, Adam Kirrander, Jennifer M. Ruddock, Yu Chang, Andrés Moreno Carrascosa, Darren Bellshaw, Jason E. Koglin, Peter M. Weber, Haiwang Yong, Asami Odate, Wenpeng Du, Brian Stankus, Mengning Liang, Michael P. Minitti, Joseph Robinson, Nathan Goff, Sébastien Boutet, Nikola Zotev |
| المصدر: | Science Advances Ruddock, J M, Yong, H, Stankus, B, Du, W, Goff, N, Chang, Y, Odate, A, Carrascosa, A M, Bellshaw, D, Zotev, N, Liang, M, Carbajo, S, Koglin, J, Robinson, J S, Boutet, S, Kirrander, A, Minitti, M P & Weber, P M 2019, ' A deep UV trigger for ground-state ring-opening dynamics of 1,3-cyclohexadiene ', Science Advances, vol. 5, no. 9 . https://doi.org/10.1126/sciadv.aax6625 |
| بيانات النشر: | American Association for the Advancement of Science (AAAS), 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | Materials science, Astrophysics::High Energy Astrophysical Phenomena, Physics::Optics, 02 engineering and technology, 1,3-Cyclohexadiene, 010402 general chemistry, 01 natural sciences, chemistry.chemical_compound, symbols.namesake, Physics::Atomic and Molecular Clusters, Single bond, Physics::Chemical Physics, Nuclear Experiment, Anisotropy, Conformational isomerism, Research Articles, Chemical Physics, Multidisciplinary, Scattering, SciAdv r-articles, 021001 nanoscience & nanotechnology, 0104 chemical sciences, Chemistry, chemistry, Rydberg formula, symbols, Atomic physics, 0210 nano-technology, Ground state, Excitation, Research Article |
| الوصف: | Dynamics of a ground-state chemical reaction are revealed by ultrafast x-ray scattering. We explore the photo-induced kinetics of 1,3-cyclohexadiene upon excitation at 200 nm to the 3p state by ultrafast time-resolved, gas-phase x-ray scattering using the Linac Coherent Light Source. Analysis of the scattering anisotropy reveals that the excitation leads to the 3px and 3py Rydberg electronic states, which relax to the ground state with a time constant of 208 ± 11 fs. In contrast to the well-studied 266 nm excitation, at 200 nm the majority of the molecules (76 ± 3%) relax to vibrationally hot cyclohexadiene in the ground electronic state. A subsequent reaction on the ground electronic state surface leads from the hot cyclohexadiene to 1,3,5-hexatriene, with rates for the forward and backward reactions of 174 ± 13 and 355 ± 45 ps, respectively. The scattering pattern of the final hexatriene product reveals a thermal distribution of rotamers about the carbon-carbon single bonds. |
| وصف الملف: | application/pdf |
| تدمد: | 2375-2548 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ef619d83dccd2f181dcde2c2a123ae03 https://doi.org/10.1126/sciadv.aax6625 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....ef619d83dccd2f181dcde2c2a123ae03 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 23752548 |
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