کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
50958 | 46823 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Highly active dimeric Mn(salen) catalysts entrapped within nanocages of periodic mesoporous organosilica for epoxidation of alkenes Highly active dimeric Mn(salen) catalysts entrapped within nanocages of periodic mesoporous organosilica for epoxidation of alkenes](/preview/png/50958.png)
A couple of robust and reusable diamine-bridged dimeric Mn(salen) complexes were prepared by the encapsulation of homogeneous dimeric Mn(salen) complexes into nanocages of three-dimensionally (3D) periodic mesoporous organosilica (PMO) support followed by the silylation of the support with organosilane. The materials exhibited 3D periodic mesostructure with body-centered Im3m symmetry, and the confined Mn(salen) complexes maintained their original structure. As-prepared heterogeneous dimeric Mn(salen) complexes were successfully applied in the epoxidation of three alkenes (i.e. styrene, cyclohexene, and 1-phenylcyclohexene) by using NaClO as the oxygen donor and CH2Cl2 as a solvent, and the reusability of the materials was evaluated through three times' catalytic runs.
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► A couple of diamine-bridged dimeric Mn(salen) complexes were prepared.
► The materials were successfully applied in the epoxidation of three alkenes.
► Heterogeneous dimeric Mn(salen) complexes showed higher catalytic activity.
► Heterogeneous dimeric Mn(salen) complexes could be reused by simplified separation.
Journal: Catalysis Communications - Volume 12, Issue 3, 30 November 2010, Pages 238–242