Abstract
The photochemistry of the ferrous ion in the presence and in the absence of oxygen was investigated in the pH region 0.35-3.0. The pH dependence of the initial quantum yield up to pH 2.5 in the presence and absence of oxygen is interpreted as arising from the dependence on H+ ion concentration of the rate of introduction of H atoms into the bulk. This results in the dependence of the quantum yield on √[H+]. A mechanism to account for this is proposed. Another pathway leading to the pH independent formation of H atom also is postulated. The oxidation and reduction processes of the H atoms thus formed are investigated and it is shown that the oxidation of Fe2+ by H atoms may proceed by way of a hydride intermediate. Specific velocity constants are derived. The results of the photochemical experiments are correlated with those obtained in radiation chemistry.
Original language | English |
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Pages (from-to) | 1264-1271 |
Number of pages | 8 |
Journal | Journal of Physical Chemistry |
Volume | 66 |
Issue number | 7 |
DOIs | |
State | Published - 1962 |
Externally published | Yes |