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Title
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Synthesis, characterization and catalytic activity of copper deposited on MCM-41 in the synthesis of 5-substituted 1H-tetrazoles
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Type
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JournalPaper
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Keywords
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Cu-functionalized · Mesoporous MCM-41 · Synthesis of 5-substituted 1H-tetrazoles
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Abstract
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Cu-functionalized mesoporous MCM-41 materials were synthesized via two different types of post-functionalization modification of MCM-41, without the ligand (MCM-41@Cu) and with ligand (MCM-41@Histidine@Cu). Cu-functionalized mesoporous MCM-41 sample was also prepared directly via co-condensation of CuCl2 and decyltrimethylammonium bromide (DTAB) with tetraethyl orthosilicate (TEOS) (Cu-MCM-41). The textural properties of the samples were characterized by powder X-ray diffraction (XRD), Fourier transforms infrared (FTIR) spectra, nitrogen adsorption–desorption, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The results show that the structure of MCM-41 persisted after modification. These catalysts are efficient catalysts for the synthesis of 5-substituted 1H-tetrazoles in water. Cu-functionalized mesoporous MCM-41 materials displayed high catalytic performance at low-temperature. Cu-functionalized MCM-41 sample synthesized with direct co-condensation method displayed better catalytic activity compared to Cu-functionalized mesoporous MCM-41 materials prepared with post-synthesis grafting methods. These catalysts can be easily recovered.
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Researchers
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Shida Khorami (Third Researcher), Mohammad Ghadermazi (First Researcher), Somayeh Molaei (Second Researcher)
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