science-softCon uv/vis+ spectra data base;		www.uv-spectra.de; (C) science-softCon 2011

Substance: water					Other Names: 

Formula: H2O					CAS-No.: 7732-18-5

Study: photolysis, quantum yields

                
Authors: N. Getoff, G.O. Schenck

Title: Primary products of liquid water photolysis at 1236, 1470, and 1849 Å

Journal/Source: Photochem. and Photobiol., 8 (3), 167-178, (1968); DOI: 10.1111/j.1751-1097.1968.tb05859.x


Data: (diagram, table, disk): 

Energy/Wavelength range: 123.6, 147.0, and 184.9 nm

Resolution: 

Temperature: 

Temperature dependence: 

Pressure/Concentration: 

Phase (gas, liquid, solid): liquid

pH:


Comments: The yield of the primary products of the liquid water photolysis at 1236 and 1470 Å is reported. It was found that 
besides the dissociation of the excited water molecules into H and OH radicals probably e- aq is also formed.
The quantum yields determined at 1236 Å, are: Phi(H, OH) = 1.03 & 0.02, 0.06 <Phi(e-aq, H2O*) < 0.12 and at 
1470 Å,: Phi(H, OH)=0.72±0.02, 0.037 < Phi(e-aq, H2O*) <0.075. The quantum yield of high purity water at 1849 Å in the absence 
of any scavengers is Phi(H, OH)=0.022. Previously published data by us for 1849 Å are also given: Phi(H, OH)=0.33 ± 0.01 and 0.02 < Phi (e-aq H2O*) < 0.04.

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