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Oxazine containing molybdenum(VI)–oxodiperoxo complex immobilized on SBA-15 as highly active and selective catalyst in the oxidation of alkenes to epoxides under solvent-free conditions

Zare, M ; Sharif University of Technology | 2017

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  1. Type of Document: Article
  2. DOI: 10.1016/j.micromeso.2017.06.002
  3. Publisher: Elsevier B.V , 2017
  4. Abstract:
  5. Molybdenum(VI)–oxodiperoxo complex containing an oxazine ligand, ([MoO(O2)2(phox)], phox: 2-(2′-hydroxyphenyl)-5,6-dihydro-1,3-oxazine) was conveniently synthesized and immobilized onto chloro-functionalized mesoporous silica SBA-15 by covalent bonding between the chloropropyl group on the internal surface of the pores and the nitrogen atom of oxazine ligand yielding [MoO(O2)2(phox)]/SBA-15. The resulting material was characterized by FT-IR, TGA, XRD, SEM, TEM, EDX, ICP-AES, BET and UV–vis spectroscopy. The heterogeneous catalyst [MoO(O2)2(phox)]/SBA-15 was employed in the epoxidation of alkenes, exhibiting high catalytic performance and selectivity for epoxide similar to that of homogeneous catalyst, [MoO(O2)2(phox)] under solvent-free conditions. Finally, it was found that the heterogeneous catalyst had virtually no degree of leaching, which allowed its recyclability to nine cycles without loss of catalytic performance. © 2017
  6. Keywords:
  7. Epoxidation ; Oxazine ; SBA-15 ; Solvent-free ; Atomic emission spectroscopy ; Catalysts ; Hydrocarbons ; Ligands ; Mesoporous materials ; Molybdenum compounds ; Nitrogen compounds ; Solvents ; Catalytic performance ; Epoxidation of alkenes ; Heterogeneous catalyst ; High catalytic performance ; Solvent free ; Solvent free conditions ; Catalyst selectivity
  8. Source: Microporous and Mesoporous Materials ; Volume 251 , 2017 , Pages 173-180 ; 13871811 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S1387181117303980