Data on short-lived chemical species have been documented at the RCDC in critically evaluated compilations on kinetics and other properties of transients from water and from inorganic and organic solutes. A bibliographic database was developed and it has been maintained and used to provide information services. The database also supports compilation activity on excited-state processes, mainly from photochemistry and photophysics.
Data compilations currently derive from two main areas:
Rate constants for radical processes can be found through the NDRL/NIST Solution Kinetics Database on your personal computer. Printed compilations are found in the Journal of Physical and Chemical Reference Data and the NSRDS-NBS report series.
Kinetics of Radical Processes
Rate constants for primary radicals from the radiolysis of water, including
hydrated electrons, hydrogen atoms, and hydroxyl radicals, were critically
reviewed in a 1988 compilation. A compilation of kinetic data for nonmetallic
inorganic radicals in solution was published in 1988. A recently completed compilation covers rate constants for metal transients
in aqueous solution. Rate constants for chemical species of special interest
for environmental and biological applications, such as nitric oxide, are being
evaluated for addition to the database.
A compilation of kinetic data for aliphatic carbon-centered radicals in aqueous
solution is being completed for publication.
Some earlier data compilations at the RCDC covered: absorption spectral data for transient inorganic radicals, electron mobilities and free ion yields, the radiolysis of selected substances (methanol, ethanol, nitrous oxide and ammonia) with G values (radiation yield).
More information about just what's in the database and what's required to run it is available or if you want to go ahead and order it ...
Thermodynamically-reversible one-electron reduction potentials of many couples involving unstable radicals have been measured using pulse radiolysis and flash
photolysis. A critique of methods for measurement of reduction potentials
involving free radicals in aqueous solution was published along with a
compilation of the data.
Thermodynamic and Other Properties of Radiation Induced Transients
P. Wardman,
J. Phys. Chem. Ref. Data 18 1637-1755 (1989)__ Ordering info.
The NDRL/NIST Solution Kinetics Database includes chemical kinetic data for
free radical processes involving primary radicals from water, inorganic
radicals and carbon-centered radicals in aqueous solution, and organic peroxyl
radicals in various solvents. The database currently functions on any MS-DOS or PC-DOS computer.
NDRL/NIST Solution Kinetics Database
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Work supported by:
Office of Basic Energy SciencesLast Update: K.P. Madden / 960206
United States Department of Energy