Ultrafast characteristics of vibrational dynamics in tetrahydrofuran via femtosecond coherent anti-stokes Raman scattering
| Autor: | Yanqiang Yang, Li-lin Jiang, Honglin Wu, Xi-you Li, Yunfei Song, Weilong Liu |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Dephasing Fast Fourier transform General Physics and Astronomy Beat (acoustics) 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Spectral line 0104 chemical sciences symbols.namesake chemistry.chemical_compound chemistry Femtosecond symbols Physical and Theoretical Chemistry Atomic physics 0210 nano-technology Ultrashort pulse Raman scattering Tetrahydrofuran |
| Zdroj: | Chemical Physics Letters. 765:138256 |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/j.cplett.2020.138256 |
| Popis: | Ultrafast vibrational dynamics in pure liquid tetrahydrofuran were studied with femtosecond coherent anti-Stokes Raman scattering. The dephasing time T2 is 0.43–0.49 ps in time-resolved spectra, and the beat frequencies 116 (126) cm−1, 185 cm−1, and 300 cm−1 in fast Fourier transform spectra are attributed to vibrational coherence of v13/v12, v12/v9, and v13/v9 modes, respectively. The oscillatory decay originated from v13/v12 could be fitted by biexponential function with lifetime of τ 1 / 2 = 0.43 - 0.48 ps and τ 2 / 2 = 0.12 - 0.22 ps. Calculated beat frequencies of 118 cm−1 and 110 cm−1 are consistent with fast Fourier transform spectra. This study is to understand chemical reaction mechanism in the condensed-phase system. |
| Databáze: | OpenAIRE |
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