Aminothiazole Ligand-Type Dioxo-Mo(VI) Complex Anchored on TiO2 Nanotubes for Selective Oxidation of Monoterpenes with Light and O2

Selective Oxygen Atom Transfer to alpha-pinene, beta-pinene, (R)-limonene and camphene by dioxo-Mo(VI)Ln complex {Ln =2-aminothiazole-4-carboxylic acid} anchored on TiO2 nanotubes (TiO2-NT) using O-2 as oxidant and UV light was studied at ambient conditions. The Catalytic system was characterized by FTIR, H-1 NMR and C-13, and elemental analysis. Molecular oxygen reoxidizes the (Mo(IV)=O) reduced unit in the darkness, forming an oxo-peroxo-Mo intermediate. The catalyst under UV radiation transfers two oxygen atoms to the olefin. The alpha-pinene is found to be the most reactive monoterpene. [GRAPHICS] .

Automated summary

In this study, selective oxygen atom transfer to various terpenes was achieved using a dioxo-Mo(VI)Ln complex anchored on TiO2 nanotubes under UV light and O2 as oxidant. Characterization of the catalytic system was done using FTIR, H-1 NMR, C-13, and elemental analysis. It was found that alpha-pinene was the most reactive monoterpene among the substrates.