Observation of the molecular response to light upon photoexcitation
| العنوان: | Observation of the molecular response to light upon photoexcitation |
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| المؤلفون: | Sergio Carbajo, Sébastien Boutet, Peter M. Weber, Jennifer M. Ruddock, Nikola Zotev, Haiwang Yong, Nathan Goff, Jason E. Koglin, Wenpeng Du, Joseph Robinson, Mengning Liang, Darren Bellshaw, Mats Simmermacher, Brian Stankus, Yu Chang, Adam Kirrander, Andrés Moreno Carrascosa, Michael P. Minitti |
| المصدر: | Nature Communications Nature Communications, Vol 11, Iss 1, Pp 1-6 (2020) Yong, H, Zotev, N, Ruddock, J M, Stankus, B, Simmermacher, M, Carrascosa, A M, Du, W, Goff, N, Chang, Y, Bellshaw, D, Liang, M, Carbajo, S, Koglin, J E, Robinson, J S, Boutet, S, Minitti, M P, Kirrander, A & Weber, P M 2020, ' Observation of the molecular response to light upon photoexcitation ', Nature Communications, vol. 11, 2157 . https://doi.org/10.1038/s41467-020-15680-4 |
| بيانات النشر: | Nature Publishing Group UK, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Electromagnetic field, Electron density, Science, Chemical physics, General Physics and Astronomy, Electron, Imaging techniques, 010402 general chemistry, 01 natural sciences, General Biochemistry, Genetics and Molecular Biology, Article, 0103 physical sciences, Molecule, lcsh:Science, Physics, Multidisciplinary, 010304 chemical physics, Scattering, Excited states, General Chemistry, 0104 chemical sciences, Photoexcitation, Excited state, lcsh:Q, Atomic physics, Ultrashort pulse, Quantum chemistry |
| الوصف: | When a molecule interacts with light, its electrons can absorb energy from the electromagnetic field by rapidly rearranging their positions. This constitutes the first step of photochemical and photophysical processes that include primary events in human vision and photosynthesis. Here, we report the direct measurement of the initial redistribution of electron density when the molecule 1,3-cyclohexadiene (CHD) is optically excited. Our experiments exploit the intense, ultrashort hard x-ray pulses of the Linac Coherent Light Source (LCLS) to map the change in electron density using ultrafast x-ray scattering. The nature of the excited electronic state is identified with excellent spatial resolution and in good agreement with theoretical predictions. The excited state electron density distributions are thus amenable to direct experimental observation. Photoabsorption is a fundamental process that leads to changes in the electron density in matter. Here, the authors show a direct measurement of the distribution of electron density when a cyclohexadine molecule is excited by pulsed UV radiation and probed by a time delayed X-ray pulse generated at LCLS. |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 2041-1723 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37b3dcd11182adf74d9349b3964bfb44 http://europepmc.org/articles/PMC7195484 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....37b3dcd11182adf74d9349b3964bfb44 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20411723 |
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