Highly efficient solvent free oxidation of ethylbenzene using some recyclable catalysts: The role of linker in competency of manganese nanocatalysts

作者：Arshadi Mohammad; Ghiaci Mehran^*

来源：Applied Catalysis A: General , 2011, 399(1-2): 75-86.

DOI：10.1016/j.apcata.2011.03.043

• Mn nanocatalyst
• Ethylbenzene
• Acetophenone
• Oxidation
• Nanosized SiO(2)-Al(2)O(3)

SiO(2)-Al(2)O(3) mixed-oxide was functionalized with 3-aminopropyl-triethoxysilane (3-APTES) and 2-aminoethyl-3-aminopropyl-trimethoxysilane (2-AE-3-APTMS) groups. The resulting modified nanosized SiO(2)-Al(2)O(3) mixed-oxides were further functionalized with three different Schiff base groups followed by complexation with Mn(OAc)(2) to afford the corresponding immobilized Mn catalysts. The synthesized materials were characterized by FT-IR spectroscopy, UV-vis, CHN elemental analysis, ICP-MS, EPR, SEM, and TEM. The catalytic activities of the heterogenized Mn catalysts were studied in the oxidation of ethylbenzene without the need of any solvent, at 80 degrees C, using tert-butyl hydroperoxide as oxygen source. Si/Al-pr-NH-et-N=methyl-2-pyridylketone-Mn had high catalytic activity and selectivity to acetophenone (93%), and could be reused at least 4 times without significant loss in activity.

• 出版日期2011-5-31