Silica supported Mn(Br8TPP)Cl and Mn(TPP)Cl as efficient and reusable catalysts for selective hydrocarbon oxidation under various reaction conditions: The effect of substituted bromines on the catalytic activity and reusability
| Autor: | Hadi Kargar, Shahram Tangestaninejad, Iraj Mohammdpoor-Baltork, Valiollah Mirkhani, Majid Moghadam |
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| Rok vydání: | 2008 |
| Předmět: |
Alkane
chemistry.chemical_classification Chemistry Process Chemistry and Technology Inorganic chemistry chemistry.chemical_element Manganese Heterogeneous catalysis Chloride Catalysis Hydroxylation chemistry.chemical_compound Hydrocarbon Polymer chemistry medicine Imidazole Physical and Theoretical Chemistry medicine.drug |
| Zdroj: | Journal of Molecular Catalysis A: Chemical. 288:116-124 |
| ISSN: | 1381-1169 |
| DOI: | 10.1016/j.molcata.2008.03.028 |
| Popis: | The imidazole-modified silica (SiIm) was used for immobilization of octabromotetraphenylporphyrinatomanganese(III) chloride, Mn(Br 8 TPP)Cl and tetraphenylporphyrinatomanganese(III) chloride, Mn(TPP)Cl. SiIm is not only a heterogeneous axial base but also a support for immobilization of manganese porphyrins. [Mn(Br 8 TPP)Cl-SiIm] and [Mn(TPP)Cl-SiIm] as biomimetic oxidation catalysts catalyze alkene epoxidation and alkane hydroxylation with NaIO 4 under agitation with magnetic stirring. Ultrasonic irradiation enhanced the catalytic activity of these catalysts in alkene epoxidation and alkane hydroxylation and this led to shorter reaction times and higher product yields. These new heterogenized catalysts could be reused several times without significant loss of their catalytic activity. |
| Databáze: | OpenAIRE |
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