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A kinetic study of the photoinduced oxo-transfer using a Mo complex anchored to Ti[O.sub.2]/Un estudio cinetico de la oxo-transferencia fotoinducida usando un complejo de Mo anclado a Ti[O.sub.2]
Ist Teil von
Revista Facultad de Ingeniería, 2021-01 (98), p.83
Ort / Verlag
Universidad de Antioquia, Facultad de Ingenieria
Erscheinungsjahr
2021
Link zum Volltext
Quelle
EZB Electronic Journals Library
Beschreibungen/Notizen
Kinetic study of the photo-assisted oxygen atom transfer reaction (OAT) using a dioxo-Mo complex anchored on Ti[O.sub.2], stimulated by light, was performed at ambient conditions using triphenylphosphine (P[Ph.sub.3]) as a model molecule. The kinetic of the OAT reaction was studied with three catalytic systems: 4,4'-dicarboxylate-2,2'-bipyridine-dioxochloromolybdenum (Mo[O.sub.2]L/Ti[O.sub.2]), [H.sub.2]Mo[O.sub.4] ([H.sub.2]Mo[O.sub.4]/Ti[O.sub.2]) and molybdenum oxide (Mo[O.sub.3]/ Ti[O.sub.2]) anchored to Ti[O.sub.2]. The Mo[O.sub.2]L/Ti[O.sub.2] gives conversion higher than 90% and selectivity (to phosphine oxide) close to 100%. Mo[O.sub.3]/Ti[O.sub.2] did not allow the oxo-transference, suggesting the importance of the bipyridine ligand as an electronic connector between Mo[O.sub.2]L unit and Ti[O.sub.2]. With the Mo[O.sub.2]L/Ti[O.sub.2] system was observed that when the photonic flux increases, the quantum yield, and the OAT reaction rate increases.