Electron solvation in methanol revisited

Holpár, P.; Megyes, Tünde; Keszei, Ernő

doi:10.1016/s0969-806x(99)00248-0

Cited by 7 publications

(3 citation statements)

References 26 publications

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“…A dual channel mechanism, invoking direct relaxation of delocalized excess electrons into solvated states in addition to the stepwise process, has been postulated in the radiolysis of alcohols. 19,20 In Fig. 1, this corresponds to a direct path from the green electron at the top to the blue one at the bottom.…”

Section: Resultsmentioning

confidence: 99%

Electron solvation dynamics and reactivity in ionic liquids observed by picosecond radiolysis techniques

et al. 2012

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On time scales of a nanosecond or less, radiolytically-generated excess electrons in ionic liquids undergo solvation processes and reactions that determine all subsequent chemistry and the accumulation of radiolytic damage. Using picosecond pulse radiolysis detection methods, we observed and quantified the solvation response of the electron in 1-methyl-1-butyl-pyrrolidinium bis (trifluoromethylsulfonyl)amide and used it to understand electron scavenging by a typical solute, duroquinone.

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Section: Resultsmentioning

confidence: 99%

Electron solvation dynamics and reactivity in ionic liquids observed by picosecond radiolysis techniques

et al. 2012

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“…Models for Solvation Dynamics. The solvation of an excess electron in polar liquids is a subject under debate. ,,,− It is still unclear if the relaxation proceeds stepwise, by continuous relaxation, or by a combination of both mechanisms. We found it worthwhile to evaluate those hypotheses with a meticulous data analysis.…”

Section: Data Analysis and Discussionmentioning

confidence: 99%

Solvation Dynamics of the Electron Produced by Two-Photon Ionization of Liquid Polyols. 1. Ethylene Glycol

et al. 2006

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Solvated electrons have been produced in ethylene glycol by two-photon ionization of the solvent with 263 nm femtosecond laser pulses. The two-photon absorption coefficient of ethylene glycol at 263 nm is determined to be beta = (2.1 +/- 0.2) x 10(-11) m W(-1). The dynamics of electron solvation in ethylene glycol has been studied by pump-probe transient absorption spectroscopy. So, time-resolved absorption spectra ranging from 430 to 710 nm have been measured. A blue shift of the spectra is observed for the first tens of picoseconds. Using the Bayesian data analysis method, the observed solvation dynamics are reconstructed with different models: stepwise mechanisms, continuous relaxation models, or combinations of stepwise and continuous relaxation. Comparison between models is in favor of continuous relaxation, which is mainly governed by solvent molecular motions.

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“…Due to the development of ultrashort laser pulses, great strides have been made in the observation of the dynamics of this electron on subpicosecond to picosecond time scales. − The initial work of Migus et al and subsequent studies in water 3 and alcohols 2,16,18 suggested the existence of infrared absorbing precursors of the solvated electron. However, other works on electron solvation favored a continuous relaxation, often called “continuous shift” model, in which the existence of infrared absorbing species is not required. ,, Combinations of both mechanisms, stepwise and continuous models, have also been proposed to account for the observed spectral evolution. ,,, …”

Section: Introductionmentioning

confidence: 99%

Solvation Dynamics of Electron Produced by Two-Photon Ionization of Liquid Polyols. II. Propanediols

et al. 2007

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Temporal evolution of transient absorption spectra of electrons produced by two-photon ionization of two isomers, propane-1,2-diol (12PD) and propane-1,3-diol (13PD), with 263 nm femtosecond laser pulses has been studied on picosecond time scale. The two-photon absorption coefficients of 12PD and 13PD at 263 nm were determined to be beta = (2.0 +/- 0.3) x 10(-11) and (2.4 +/- 0.3) x 10(-11) m W(-1), respectively. Time-resolved absorption spectra ranging from 440 to 720 nm have been measured, showing a blue shift for the first tens of picoseconds for both solvents. However, the observed solvation dynamics of electron appears faster in 13PD than in 12PD. The transient signals of electron solvation have then been reconstructed with different models (stepwise mechanism or continuous relaxation model) using a Bayesian data analysis method. Results are discussed, compared with those previously obtained in ethylene glycol (J. Phys. Chem. A 2006, 110, 1705) and corroborate the interpretation, according to which the solvation of electrons is mainly governed by continuous solvent molecular motions.

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Electron solvation in methanol revisited

Cited by 7 publications

References 26 publications

Electron solvation dynamics and reactivity in ionic liquids observed by picosecond radiolysis techniques

Electron solvation dynamics and reactivity in ionic liquids observed by picosecond radiolysis techniques

Solvation Dynamics of the Electron Produced by Two-Photon Ionization of Liquid Polyols. 1. Ethylene Glycol

Solvation Dynamics of Electron Produced by Two-Photon Ionization of Liquid Polyols. II. Propanediols

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