Abstract
Iodoform dissolved in hexane is decomposed by means of a ruby laser pulse at moderate intensity at which two-photon absorption is negligible. The reaction only occurs in the presence of traces of iodine and oxygen. The kinetics is of order 1 2 with respect to the light intensity and iodine concentration and of order 1 with respect to the iodoform concentration. The dependence on the oxygen concentration is more complex: at low concentration oxygen acts as a catalyst giving a reaction rate proportional to the square root of the concentration; at high concentrations oxygen acts as an inhibitor and the rate becomes proportional to the inverse square root of the concentration. A free radical chain mechanism is proposed initiated by oxygen-catalyzed photodecomposition of iodine.
| Original language | English |
|---|---|
| Pages (from-to) | 221-227 |
| Number of pages | 7 |
| Journal | Journal of Photochemistry |
| Volume | 6 |
| Issue number | 3 |
| DOIs | |
| State | Published - 1976 |