Isopropyl alcohol photodecomposition

Ti, Nb, Ta, Mo, W, Fe, or Mn. One member of this family BisTisFeOis (with a bandgap of about 2-2.5 eV) has been reported to have photocatalytic activity for the decomposition of rhodamine B and acetaldehyde under visible light irradiation [84] or isopropyl alcohol photodecomposition [85]. 

The photodecomposition of isopropyl alcohol on silica gel produces a seven-line spectrum having a hyperfine separation of 20.7 G and an amplitude ratio of 1 6.7 20.2 31 21.1 7.4 1.5 (68). This spectrum was attributed to SiOCMe2 formed from the ether surface groups. In addition to this spectrum the spectrum of the methyl radical was also observed. Irradiation of adsorbed tert-butyl alcohol produced a three-line spectrum which was attributed to SiOMe2OCH2 (68). Apparently the splitting from the methyl protons was too small to be observed. 

A detailed product study of the irradiation of benzil in cumene and in isopropyl alcohol has shown that a complex product mixture, similar to that observed from irradiation of benzil in cyclohexane, is obtained.83 However, from the data in these solvents, as in the case of cyclohexane, it is difficult to draw any firm mechanistic conclusions since it is not known if all the observed products are primary photoproducts or if many of them are formed via secondary reactions of the primary photoproduct or products. The complexity of the product mixture may be due to photodecomposition of 10. 

---