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题名: Enantioselective epoxidation of unfunctionalized olefins catalyzed by the Mn(salen) catalysts immobilized in the nanopores of mesoporous materials
作者: Zhang, HD;  Zhang, YM;  Li, C
通讯作者: 李灿
关键词: heterogeneous catalysis ;  chiral catalysis ;  enantioselective ;  asymmetric catalysis ;  epoxidation ;  sulfonic ;  immobilization ;  grafting ;  unfunctionalized olefin ;  Mn(salen) complexes ;  confinement effect
刊名: JOURNAL OF CATALYSIS
发表日期: 2006-03-10
DOI: 10.1016/j.jcat.2005.12.023
卷: 238, 期:2, 页:369-381
收录类别: SCI
文章类型: Article
部门归属: 5
项目归属: 503
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Three Mn(salen) catalysts were immobilized in nanopores or on external surface of mesoporous materials via phenyl sulfonic groups with different linkage lengths. The influence of the axial linkage length and the nanopores or external surface of supports on the catalytic performance of the heterogeneous Mn(salen) catalysts was investigated in detail. The ee values increase with increasing linkage length for the Mn(salen) catalysts immobilized in nanopores but remain almost unchanged for those catalysts anchored on the external surface. The ee values obtained for the Mn(salen) catalysts immobilized in nanopore increase with decreasing nanopore size and they are generally higher than those of the same catalysts anchored on the external surface of support. Modification of the nanopore surface by methyl groups improves the reaction performance for the asymmetric epoxidation. The confinement effect originating from nanopores not only enhances the chiral recognition of the chiral catalyst, but also restricts the rotation of the intermediate in nanopores, enhancing the asymmetric induction and giving higher ee values than those obtained for the same catalysts anchored oil the external Surface. (c) 2006 Elsevier Inc. All rights reserved.
关键词[WOS]: CHIRAL SALEN COMPLEXES ;  SCHIFF-BASE COMPLEX ;  ASYMMETRIC EPOXIDATION ;  STEREOSELECTIVE EPOXIDATION ;  NONFUNCTIONALIZED ALKENES ;  MN(III)-SALEN COMPLEX ;  MCM-41 ;  STYRENE ;  DONOR ;  CLAY
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000235625100015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/98233
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, HD,Zhang, YM,Li, C. Enantioselective epoxidation of unfunctionalized olefins catalyzed by the Mn(salen) catalysts immobilized in the nanopores of mesoporous materials[J]. JOURNAL OF CATALYSIS,2006,238(2):369-381.
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