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Issue 3, 2019
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Selective oxidation of thioanisole by titanium complexes immobilized on mesoporous silica nanoparticles: elucidating the environment of titanium(IV) species

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Abstract

Titanium-immobilized materials based on mesoporous silica nanoparticles (MSNs) were prepared via a simple one-step method with a silylating agent and titanium precursors with different electronic and sterical characteristics. The mesostructure of the materials was confirmed by X-ray diffraction and N2 adsorption–desorption isotherm studies and their nanospherical morphology demonstrated by transmission electron microscopy (TEM). The titanium materials were also characterized by X-ray fluorescence (XRF), 13C CP/MAS NMR spectroscopy (MAS-NMR) and Fourier-transform infrared spectroscopy (FT-IR). The synthesized materials were highly efficient and recyclable catalysts for the selective oxidation of thioanisole with hydrogen peroxide, as a green oxidant, at room temperature and after 5 min of reaction time. In addition, UV–vis diffuse reflectance, Raman and 47/49Ti MAS-NMR spectroscopies and solid-state electrochemical techniques were employed to study the titanium environment of fresh and reused catalysts.

Graphical abstract: Selective oxidation of thioanisole by titanium complexes immobilized on mesoporous silica nanoparticles: elucidating the environment of titanium(iv) species

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Publication details

The article was received on 16 Sep 2018, accepted on 12 Dec 2018 and first published on 13 Dec 2018


Article type: Paper
DOI: 10.1039/C8CY01929K
Catal. Sci. Technol., 2019,9, 620-633

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    Selective oxidation of thioanisole by titanium complexes immobilized on mesoporous silica nanoparticles: elucidating the environment of titanium(IV) species

    P. Cruz, M. Fajardo, I. del Hierro and Y. Pérez, Catal. Sci. Technol., 2019, 9, 620
    DOI: 10.1039/C8CY01929K

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