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The structure of the reactive oxo-titanium species (hydroperoxo-, peroxo-, and superoxo-titanium) in titanosilicate molecular sieves (TS-1, Ti-β, amorphous Ti-SiO 2 , and TiMCM-41), generated on interaction with aqueous H 2 O 2 or urea-H 2 O 2 adducts, was investigated by electron paramagnetic resonance (EPR) and diffuse reflectance UV-visible (DRUV-visible)...
In an attempt to rationalize the differences in the catalytic behavior of titanosilicate molecular sieves when using H2O2 (TS-1, TiMCM-41) versus H2+O2 (Pd–TS-1) as oxidant, the Ti(IV)–superoxo and hydroperoxo/peroxo species formed in situ during the oxidation reactions were investigated by electron paramagnetic resonance (EPR) and diffuse reflectance UV–visible spectroscopies. Two types of superoxo...
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