Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser Pulses
For this study, we employed intense 400 nm, 100 fs pulses linearly propagated through a 50 cm water medium, initially self-stretching the excitation pulses to 2.50 ps. Subsequently, the self-stretched 2.50 ps pulses were focused into deionized water, and we conducted transient absorption experiments...
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MDPI AG
2024-03-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/29/6/1245 |
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| author | Jun Tang Zhongyang Wang |
| author_facet | Jun Tang Zhongyang Wang |
| author_sort | Jun Tang |
| collection | DOAJ |
| description | For this study, we employed intense 400 nm, 100 fs pulses linearly propagated through a 50 cm water medium, initially self-stretching the excitation pulses to 2.50 ps. Subsequently, the self-stretched 2.50 ps pulses were focused into deionized water, and we conducted transient absorption experiments to measure and investigate the dynamics of hydrated electrons in water. The excess electrons generated were injected into the hydrogen bond network of the water cluster, leading to the observation of saturated hydrated electrons. Additionally, we observed the emergence of the forward stimulated Raman scattering (SRS) of water molecules. We report the experimental observation of a weak forward SRS emission at 463 nm (corresponding to 3400 cm<sup>−1</sup>), indicative of the ordinary OH stretching vibration in the liquid phase. Moreover, we observed an intense forward SRS emission at 460 nm in water, corresponding to two anomalous Raman shifts at 3260 cm<sup>−1</sup> and 3355 cm<sup>−1</sup>. These anomalous Raman shifts resulted from changes in the hydrogen bond network structure. We determine that the formation of not fully hydrated and saturated hydrated electrons plays a crucial role in producing this phenomenon. |
| first_indexed | 2024-04-24T17:58:35Z |
| format | Article |
| id | doaj.art-b320a8e131d148bf9d10388cd24c171d |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-04-24T17:58:35Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-b320a8e131d148bf9d10388cd24c171d2024-03-27T13:56:50ZengMDPI AGMolecules1420-30492024-03-01296124510.3390/molecules29061245Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser PulsesJun Tang0Zhongyang Wang1Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, ChinaShanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, ChinaFor this study, we employed intense 400 nm, 100 fs pulses linearly propagated through a 50 cm water medium, initially self-stretching the excitation pulses to 2.50 ps. Subsequently, the self-stretched 2.50 ps pulses were focused into deionized water, and we conducted transient absorption experiments to measure and investigate the dynamics of hydrated electrons in water. The excess electrons generated were injected into the hydrogen bond network of the water cluster, leading to the observation of saturated hydrated electrons. Additionally, we observed the emergence of the forward stimulated Raman scattering (SRS) of water molecules. We report the experimental observation of a weak forward SRS emission at 463 nm (corresponding to 3400 cm<sup>−1</sup>), indicative of the ordinary OH stretching vibration in the liquid phase. Moreover, we observed an intense forward SRS emission at 460 nm in water, corresponding to two anomalous Raman shifts at 3260 cm<sup>−1</sup> and 3355 cm<sup>−1</sup>. These anomalous Raman shifts resulted from changes in the hydrogen bond network structure. We determine that the formation of not fully hydrated and saturated hydrated electrons plays a crucial role in producing this phenomenon.https://www.mdpi.com/1420-3049/29/6/1245laser-induced breakdownfilamentsexcess electronshydrated electronsstimulated Raman scatteringRaman spectrum |
| spellingShingle | Jun Tang Zhongyang Wang Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser Pulses Molecules laser-induced breakdown filaments excess electrons hydrated electrons stimulated Raman scattering Raman spectrum |
| title | Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser Pulses |
| title_full | Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser Pulses |
| title_fullStr | Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser Pulses |
| title_full_unstemmed | Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser Pulses |
| title_short | Hydrated Electron Dynamics and Stimulated Raman Scattering in Water Induced by Ultrashort Laser Pulses |
| title_sort | hydrated electron dynamics and stimulated raman scattering in water induced by ultrashort laser pulses |
| topic | laser-induced breakdown filaments excess electrons hydrated electrons stimulated Raman scattering Raman spectrum |
| url | https://www.mdpi.com/1420-3049/29/6/1245 |
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