Photochemical data

W. B. DeMore and co-workers. Chemical Kinetics and Photochemical Data for Use in Stratospheric Ocyone Modeling Evaluation No. 8, JPL Publ. 87—41, Jet Propulsion Laboratory, Pasadena, Calif., 1987. 

To date, most of the photochemical data available for transition metal complexes comes from condensed phase studies (1). Recently, the primary photochemistry of a few model transition metal carbonyl complexes has been investigated in gas phase (5.). Studies to date indicate that there are many differences between the reactivity of organometallic species in gas phase (5.6) as conq>ared with matrix (7-10) or solution (11-17) environments. In most cases studied, photoexcitation of isolated transition metal... 

WB DeMore, SP Sander, DM Golden, RF Hampson, MJ Kurylo, CJ Howard, AR Ravishankara, CE Kolb, MJ Molina. Chemical Kinetics and Photochemical Data for Use in Stratospheric Modeling, JPL Publication 97-4. Pasadena NASA JPL, 1997. 

Atkinson, R., Baulch, D. L., Cox, R. A., Crowley, J. N., Hampson Jr., R. F., Kerr, J. A., Rossi, M. J., and Troe, J. Summary of Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry, IUPAC Subcommittee on Gas Kinetic Data Evaluation for Atmospheric Chemistry, http //www.iupac-kinetic.ch.cam.ac.uk, December 2001. 

Hampson RF. 1980. Chemical kinetic and photochemical data sheets for atmospheric reactions. Washington, DC U.S. Department of Transportation. 

Garvin. D., and R. F. Hampson. Chemical Kinetics Data Survey. VII. TaUes of Rate and Photochemical Data for Modeling of the Stratosphere. National Bureau of Standards Internal Report 74-430, 1974. p. 11. 

The chemistry of the troposphere (the layer of the atmosphere closest to earth s surface) overlaps with low-temperature combustion, as one would expect for an oxidative environment. Consequently, the concerns of atmospheric chemistry overlap with those of combustion chemistry. Monks recently published a tutorial review of radical chemistry in the troposphere. Atkinson and Arey have compiled a thorough database of atmospheric degradation reactions of volatile organic compounds (VOCs), while Atkinson et al. have generated a database of reactions for several reactive species with atmospheric implications. Also, Sandler et al. have contributed to the Jet Propulsion Laboratory s extensive database of chemical kinetic and photochemical data. These reviews address reactions with atmospheric implications in far greater detail than is possible for the scope of this review. For our purposes, we can extend the low-temperature combustion reactions [Equations (4) and (5)], whereby peroxy radicals would have the capacity to react with prevalent atmospheric radicals, such as HO2, NO, NO2, and NO3 (the latter three of which are collectively known as NOy) ... 

There are several highly useful sources of data on the absorption spectra and photochemistry of atmospheric species. NASA publishes on a regular basis a summary of kinetics and photochemical data directed to stratospheric chemistry (DeMore et al., 1997). However, much of the data is also relevant to the troposphere. This document can be obtained from the Jet Propulsion Laboratory in Pasadena, California. Alternatively, the data are available through the Internet (see Appendix IV). IUPAC also publishes regularly in The Journal of Physical Chemical Reference Data a summary directed more toward tropospheric chemistry (Atkinson et al., 1997a, 1997b). Finally, Nolle et al. (1999) have made available a CD-ROM containing the UV-visible spectra of species of atmospheric interest. 

Fish, D. J., and M. R. Burton, The Effect of Uncertainties in Kinetic and Photochemical Data on Model Predictions of Stratospheric Ozone Depletion, J. Geophys. Res., 102, 25537-25542 (1997). 

Values from Ko et al. (f998) estimated using the more recent kinetic and photochemical data from DeMore et al. (1997). 

Instead of reviewing the whole field the new and possible future developments received first priority. For instance, the photochemical data on flavins were only mentioned incidentally because, in the author s view, the photochemical reactivity of flavin can be related less directly to the catalytic properties of most flavoproteins. However, for the reader interested in this subject the few references given should make possible an easy access to the appropriate literature. 

Atkinson et al. Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry Supplement III [18] Supplement IV [19] Supplement V [20] Supplement VI [16] Organic Species Supplement VII [17] Supplement VIII, Halogen Species [21]... 

R. Atkinson, D.L. Baulch, R.A. Cox, R.F. Hampson, J.A. Kerr, M.J. Rossi, and J. Troe. Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry, Organic Species Supplement VII. J. Phys. Chem. Ref. Data, 28 191-392,1999. 

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