✦ LIBER ✦

Femtosecond studies of electron-cation dynamics in neat water: The effects of isotope substitution

✍ Scribed by Frederick H. Long; Hong Lu; Kenneth B. Eisenthal

Publisher: Elsevier Science
Year: 1989
Tongue: English
Weight: 425 KB
Volume: 160
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(89)87628-6

No coin nor oath required. For personal study only.

✦ Synopsis

Femtosecond photoionization studies in neat protio and deuterio water at room temperature have been performed. The rate of appearance of the solvated electron is slower in D,O than in H,O, consistent with the predictions of continuum theories. The observed geminate recombination dynamics of the cation-electron pair is also isotope dependent. The recombination time is slower in D20 and the fraction of solvated electrons that escape recombination is greater in D20 than in H20. After 165 ps, 54 k I% ( i one standard deviation) of the solvated electrons escape geminate recombination in H,O and 62i 1% escape in D,O.

The increased electron escape yield is attributed to an energy transfer effect on the electron thermalization distance.

📜 SIMILAR VOLUMES

Femtosecond study of the intensity depen

Femtosecond study of the intensity dependence of electron-hole dynamics in TiO2 nanoclusters

✍ D. Philip Colombo Jr.; Kirsten A. Roussel; Jamal Saeh; David E. Skinner; Joseph 📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 627 KB

The dynamics of charge carder trapping and recombination as a function of pump fluence of 20 .~ diameter TiO2 particles in aqueous solutions is measured. Trapping of photogenerated conduction band electrons occurs in less than 500 fs. The subsequent fluence-dependent decay of trapped electrons has b

A molecular dynamics study of the isotop

A molecular dynamics study of the isotopic substitution effects on the lineshape of an internal mode in a molecular crystal

✍ Gianni Cardini; Vincenzo Schettino 📂 Article 📅 1992 🏛 Elsevier Science 🌐 English ⚖ 574 KB

Solvent isotope effects on the quenching

Solvent isotope effects on the quenching of porphyrin fluorescence by electron acceptors in alcohols or water

✍ E.I. Kapinus; I.Yu. Kucherova; I.I. Dilung 📂 Article 📅 1986 🏛 Elsevier Science ⚖ 999 KB

The role of alkyl substitution on the sp

The role of alkyl substitution on the spin distribution in the radical cation of alkyl-cyclohexane: An electron-spin-resonance study

✍ Kazumi Toriyama; Kaoru Matsuura; Keichi Nunome 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 475 KB

The role of alkyl substitution on the electronic structure of cyclohexane radical cation was investigated with low-temperature matrix ESR and semiempirical MO calculations. It was found that the unpaired electron, which is originally delocalized throughout the cyclohexane ring, tends to be confined

An electron-paramagnetic-resonance study

An electron-paramagnetic-resonance study of the dynamic Jahn-Teller effect for Sc2+ in ZnS

✍ A.O. Barksdale; T.L. Estle 📂 Article 📅 1973 🏛 Elsevier Science 🌐 English ⚖ 198 KB

Studies on the effect of the cation natu

Studies on the effect of the cation nature on the kinetics of the isotopic exchange reaction between chloride ion and O,O-diphenylphosphorochloridothionate in acetonitrile

✍ W. Reimschüssel; S. Tilk; M. Mikołajczyk; H. Ślebocka-tilk 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 English ⚖ 383 KB 👁 1 views

Rate constants and activation parameters for the isotopic exchange reactions between (Ph0)2PSCl and M:Wl (M = MedN+, Et4N+, n-BudN+, Et,,HN+, EtH:,N+, Li+) in acetonitrile were measured in order to find the effect of the cation nature on the kinetics of the reaction. T h e rate constants measured fo