Recombination of Geminate (OH,eaq-) Pairs in Concentrated Alkaline Solutions: Lack of Evidence For Hydroxyl Radical Deprotonation
arXiv:physics/0401057 · doi:10.1016/j.cplett.2004.03.134
Abstract
Picosecond dynamics of hydrated electrons and hydroxyl radicals generated in 200 nm photodissociation of aqueous hydroxide and 400 nm (3-photon) ionization of water in concentrated alkaline solutions were obtained. No deprotonation of hydroxyl radicals was observed on sub-nanosecond time scale, even in 1-10 M KOH solutions. This result is completely at odds with the kinetic data for deprotonation of OH radical in dilute alkaline solutions. We suggest that the deprotonation of hydroxyl radical is slowed down dramatically in concentrated alkaline solutions.
arXiv comment12 pages; 2 figures; submitted to Chem. Phys. Lett
References in corpus (1)
Cited by in corpus (3)
- Ultrafast Dynamics for Electron Photodetachment from Aqueous Hydroxide
- Electron Photodetachment from Aqueous Anions. II. Ionic Strength Effect on Geminate Recombination Dynamics and Quantum Yield for Hydrated Electron
- Geminate recombination of electrons generated by above-the-gap (12.4 eV) photoionization of liquid water