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Abstract
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In the present study, we report the synthesis of two green recoverable catalysts by covalent linking of creatinine La and Pr complexes on MCM-41 mesostructured via commercially available materials and simple and inexpensive procedure. These heterogeneous catalysts were characterized by Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, scanning electron microscopy, N2 adsorption and desorption, inductively coupled plasma optical emission spectroscopy and thermal gravimetric analysis. The obtained mesostructures act as active and reusable catalysts for oxidation of sulfides and oxidative coupling of thiols under neat conditions. More importantly, significant practical advantages of this environment-friendly process are high efficiency, good reaction times, convenient recovery and reusability for several times without any significant loss of activity
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