Application of a dioxo-molybdenum(VI) complex anchored on TiO2 for the photochemical oxidative decomposition of 1-chloro-4-ethylbenzene under O-2

作者：Bakhtchadjian Robert^*; Tsarukyan Samvel; Barrault Joel; Martinez Fernando O; Tavadyan Levon; Castellanos Nelson J

来源：Transition Metal Chemistry, 2011, 36(8): 897-900.

DOI：10.1007/s11243-011-9547-2

The catalytic activity of dioxo-molybdenum(VI)-dichloro[4,4'-dicarboxylato-2,2'-bipyridine] covalently anchored through the carboxylate function to the surface of TiO2 has been tested for the oxidative degradation of 1-chloro-4-ethylbenzene in MeCN solution under argon and UV irradiation (lambda = 254 nm). After 4-5 h of photochemical reaction, the Mo complex was reoxidized in the presence of O-2 in the dark, and then the reaction was continued under argon. The reaction proceeds by the intermediate formation of 4'-chloroacetophenone that undergoes further decomposition to chlorobenzene, plus small amounts of oxygen-containing organochlorine compounds, CO2 and H2O. Similar results were obtained for the decomposition of 4'-chloroacetophenone under the same conditions, which also gave chlorobenzene as one of the main products. The ratio of [final product]/[Mo complex] increases during the decomposition of 1-chloro-4-ethylbenzene (up to 350-400% for 30-35 h of reaction), which provides evidence of a catalytic process. The probable photochemical reactions are discussed.

• 出版日期2011-11