THE PHOTOLYSIS OF LIQUID WATER AT 1470A

THE PHOTOLYSIS OF LIQUID WATER AT 1470A

The photolysis of water and of dilute aqueous solutions of O2, methanol ethanol and isopropanol was studied at 1470A. The results are consistent with the reaction scheme: H2O = H2O* to (H+OH) to H2O. The limiting quantum yield for the formation of the geminate radical pair is 0.7 plus or minus 0.1 a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Sokolov, Uriel, Stein,Gabriel
Format: Report
Sprache:eng
Schlagworte:
CARBINOLS
ETHANOLS
HEAVY WATER
ISRAEL
OXYGEN
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
QUANTUM STATISTICS
QUANTUM YIELD
Radiation and Nuclear Chemistry
REACTION KINETICS
ULTRAVIOLET RADIATION
WATER
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Beschreibung
Zusammenfassung:The photolysis of water and of dilute aqueous solutions of O2, methanol ethanol and isopropanol was studied at 1470A. The results are consistent with the reaction scheme: H2O = H2O* to (H+OH) to H2O. The limiting quantum yield for the formation of the geminate radical pair is 0.7 plus or minus 0.1 at room temperature. Scavengers compete in an inhomogeneous kinetics with geminate recombination. The direct formation of molecular products other than by radical mechanisms is excluded. Results on D2O solutions of ethanol support the conclusions. The evidence does not favour direct interaction of scavengers with the excited water molecules H2O*. (Author) Rept. on The Photochemical Evolution of Oxygen.