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چکیده
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In this article, the mesoporous silica framework of KIT-6 was synthesized and, then its surface was modified using 3-aminopropyltrimethoxysilane (APTMS). The new KIT-6@DABP@Cu nanocatalyst was then prepared by anchoring the copper complex on modified mesoporous KIT-6. The nanocatalyst was identified using several techniques, including FT-IR, WDX, AAS, SEM, TGA, XRD, EDS, and BET. The physical properties, such as size, shape, and morphology of the nanocatalyst were studied by SEM analysis. The elemental composition of KIT-6@DABP@Cu nanocatalyst was described using wavelength dispersive X-ray spectroscopy (WDX) and EDS. FT-IR spectroscopy was used to characterize the functional groups in the structure of the nanoparticles. The stability of KIT-6@DABP@Cu nanocatalyst was studied by TGA at high temperatures. Also, the surface area, total volume, and average diameter of pores of the nanocatalyst were determined using Brunauer–Emmett–Teller (BET) analysis. The KIT-6@DABP@Cu catalyst was found to be a new, highly effective, and green catalyst for the synthesizing of 5-substituted-tetrazoles using nitriles and sodium azide (NaN3) catalyzed in polyethyleneglycol-400 (PEG-400) as a green solvent. This heterogeneous catalyst showed good recyclability for up to five consecutive cycles without notable loss of its catalytic efficiency
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