Core-Level Spectroscopy of 2-Thiouracil at the Sulfur L<sub>1</sub>- and L<sub>2,3</sub>-Edges Utilizing a SASE Free-Electron Laser
In this paper, we report X-ray absorption and core-level electron spectra of the nucleobase derivative 2-thiouracil at the sulfur L<sub>1</sub>- and L<sub>2,3</sub>-edges. We used soft X-rays from the free-electron laser FLASH2 for the excitation of isolated molecules and dis...
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| Auteurs principaux: | , , , , , , , , , , , , , , , , |
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| Format: | article |
| Langue: | EN |
| Publié: |
MDPI AG
2021
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| Sujets: | |
| Accès en ligne: | https://doaj.org/article/6bb959ee681c45d8b4d1dd65dadf51c6 |
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| Résumé: | In this paper, we report X-ray absorption and core-level electron spectra of the nucleobase derivative 2-thiouracil at the sulfur L<sub>1</sub>- and L<sub>2,3</sub>-edges. We used soft X-rays from the free-electron laser FLASH2 for the excitation of isolated molecules and dispersed the outgoing electrons with a magnetic bottle spectrometer. We identified photoelectrons from the 2p core orbital, accompanied by an electron correlation satellite, as well as resonant and non-resonant Coster–Kronig and Auger–Meitner emission at the L<sub>1</sub>- and L<sub>2,3</sub>-edges, respectively. We used the electron yield to construct X-ray absorption spectra at the two edges. The experimental data obtained are put in the context of the literature currently available on sulfur core-level and 2-thiouracil spectroscopy. |
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