Accession Number:

AD0756611

Title:

A Transient Intermediate in the Bimolecular Reaction of Hydrated Electrons,

Descriptive Note:

Corporate Author:

BRITISH COLUMBIA UNIV VANCOUVER DEPT OF CHEMISTRY

Report Date:

1971-12-24

Pagination or Media Count:

13.0

Abstract:

Further studies are reported which attempt to identify the transient species X produced from hydrated electrons which may be photodissociated to reform eaq-. The method used involves the production of eaq- by u.v. flash photolysis of aqueous OH-H2 solutions followed, after any specified delay, by a second and third photo-flash of restricted wavelengths. Photoregeneration of eaq- is effected by light in the spectral range 320 to 400 nm. Two conditions seem to be necessary in order to detect the presence of X, i eaq- must decay to a considerable extent through the biomolecular dimerisation reaction and ii the lifetime of eaq- with respect to all other reactions must be ca. 200 microsec. Thus it is not expected to be observable in most pulse radiolysis studies. Its extinction coefficient in that part of its absorption band which leads to photodissociation 320-400 nm is estimated. Its identity is discussed and it is concluded that X is probably the hydrated electron dimer or a product formed therefrom by association with a cation. Author

Subject Categories:

  • Radiation and Nuclear Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE