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Highly active dimeric Mn(salen) catalysts entrapped within nanocages of periodic mesoporous organosilica for epoxidation of alkenes

Paper ID Volume ID Publish Year Pages File Format Full-Text
50958 46823 2010 5 PDF Available
Title
Highly active dimeric Mn(salen) catalysts entrapped within nanocages of periodic mesoporous organosilica for epoxidation of alkenes
Abstract

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.

Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch Highlights►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.

Keywords
Periodic mesoporous organosilica; Metal–salen complex; Nanocage; Alkene; Epoxidation
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Highly active dimeric Mn(salen) catalysts entrapped within nanocages of periodic mesoporous organosilica for epoxidation of alkenes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 3, 30 November 2010, Pages 238–242
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us