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- W2000597906 abstract "We report novel transient infrared “tag and probe” investigations of the equilibrium kinetics and vibrational energy transfer between the free acid Et3SiOH and its 1:1 hydrogen-bonded complex with acetonitrile, Et3SiOH···N⋮CCH3, in dilute (0.1 mol/dm3 acid) CCl4 solutions at 293 K. Picosecond time-resolved infrared double-resonance spectroscopy measures the vibrational population of the OH-stretching mode (via v = 1 → 2 absorption) after IR excitation of either the free acid or the homogeneously broadened OH(v = 0 → 1) absorption of the complex. The free acid and 1:1 complex OH(v = 1) population lifetimes (T1) and equilibrium reaction rate constants affecting hydrogen-bond formation and dissociation are unambiguously determined for this system. Tagged free acid OH(v = 1) leads to complex formation with OH(v = 1) excitation, indicating OH(v = 1) population is maintained during collision and formation of hydrogen bonds. This is the only known example where OH(v = 1) vibrational population of a polyatomic reactant is prepared and that excitation is followed during a condensed-phase bimolecular reaction which leads to an excited hydrogen-bonded product." @default.
- W2000597906 created "2016-06-24" @default.
- W2000597906 creator A5032598541 @default.
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- W2000597906 date "1996-01-01" @default.
- W2000597906 modified "2023-10-03" @default.
- W2000597906 title "Conservation of Vibrational Excitation During Hydrogen-Bonding Reactions" @default.
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- W2000597906 doi "https://doi.org/10.1021/jp960483m" @default.
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