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• W2000492302 abstract "Collisional energy transfer between vibrational ground state CO2 and highly vibrationally excited monofluorobenzene (MFB) was studied using narrow bandwidth (0.0003 cm−1) IR diode laser absorption spectroscopy. Highly vibrationally excited MFB with E′ = ∼41 000 cm−1 was prepared by 248 nm UV excitation followed by rapid radiationless internal conversion to the electronic ground state (S1→S0*). The amount of vibrational energy transferred from hot MFB into rotations and translations of CO2 via collisions was measured by probing the scattered CO2 using the IR diode laser. The absolute state specific energy transfer rate constants and scattering probabilities for single collisions between hot MFB and CO2 were measured and used to determine the energy transfer probability distribution function, P(E,E′), in the large ΔE region. P(E,E′) was then fit to a bi-exponential function and extrapolated to the low ΔE region. P(E,E′) and the biexponential fit data were used to determine the partitioning between weak and strong collisions as well as investigate molecular properties responsible for large collisional energy transfer events. Fermi's Golden rule was used to model the shape of P(E,E′) and identify which donor vibrational motions are primarily responsible for energy transfer. In general, the results suggest that low-frequency MFB vibrational modes are primarily responsible for strong collisions, and govern the shape and magnitude of P(E,E′). Where deviations from this general trend occur, vibrational modes with large negative anharmonicity constants are more efficient energy gateways than modes with similar frequency, while vibrational modes with large positive anharmonicity constants are less efficient at energy transfer than modes of similar frequency." @default.
• W2000492302 created "2016-06-24" @default.
• W2000492302 creator A5015246999 @default.
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• W2000492302 creator A5033042898 @default.
• W2000492302 creator A5075335841 @default.
• W2000492302 creator A5084972357 @default.
• W2000492302 date "2014-12-17" @default.
• W2000492302 modified "2023-09-27" @default.
• W2000492302 title "High resolution IR diode laser study of collisional energy transfer between highly vibrationally excited monofluorobenzene and CO2: The effect of donor fluorination on strong collision energy transfer" @default.
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• W2000492302 doi "https://doi.org/10.1063/1.4903252" @default.
• W2000492302 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/25527934" @default.
• W2000492302 hasPublicationYear "2014" @default.
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