SBA-16 supported amino acid Schiff base complexes of molybdenum as new heterogeneous molybdenum catalysts
| Autor: | Ertan Şahin, Paria Eghbali, Majid Masteri-Farahani |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Schiff base Silylation chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Nitrogen 0104 chemical sciences Catalysis Amino acid chemistry.chemical_compound Colloid and Surface Chemistry Nanocages chemistry Salicylaldehyde Molybdenum Polymer chemistry 0210 nano-technology |
| Zdroj: | Colloids and Surfaces A: Physicochemical and Engineering Aspects. 570:347-353 |
| ISSN: | 0927-7757 |
| DOI: | 10.1016/j.colsurfa.2019.03.047 |
| Popis: | Immobilization of molybdenum complexes of amino acid Schiff bases within the SBA-16 nanocages produced new heterogeneous catalysts for the epoxidation of olefins. First, amino acid Schiff bases were obtained through the reaction of amino acids with salicylaldehyde. Then, complexation of the prepared amino acid Schiff bases with molybdenum (VI) produced the molybdenum complexes of amino acid Schiff bases. Immobilization of the molybdenum complexes into the SBA-16 nanocages followed by silylation with triethoxyoctylsilane gave the heterogenized molybdenum catalysts. The obtained catalysts were characterized with several physicochemical techniques. FT-IR and inductively coupled plasma optical emission (ICP-OES) spectroscopies approved the inclusion of molybdenum complexes within the SBA-16 nanocages. The results of X-ray diffraction (XRD) and nitrogen adsorption-desorption (BET method) analyses illustrated that surface properties of SBA-16 were maintained upon the inclusion of molybdenum complexes. The prepared catalysts exhibited good activities and excellent selectivities (>99%) in the epoxidation of olefins with tert-butyl hydroperoxide (TBHP). |
| Databáze: | OpenAIRE |
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