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题名: Structural control of mesoporous ethane-silicas with trans-(1R,2R)-diaminocyclohexane in the pore and asymmetric catalysis
作者: Jiang, Dongmei1;  Gao, Jinsuo1;  Li, Jun1;  Yang, Qihua1;  Li, Can1
关键词: periodic mesoporous organosilicas (PMOs) ;  chirality ;  trans-(1R,2R)-diaminocyclohexane ;  asymmetric transfer hydrogenation
刊名: MICROPOROUS AND MESOPOROUS MATERIALS
发表日期: 2008-08-01
DOI: 10.1016/j.micromeso.2007.11.036
卷: 113, 期:1-3, 页:385-392
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Nanoscience & Nanotechnology ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Science & Technology - Other Topics ;  Materials Science
英文摘要: Design and synthesis of periodic mesoporous materials containing chiral functionalities remain to be a challenging and interesting research topic. In this study, the mesostructures of the ethane-silicas with trans-(1R,2R)-diaminocyclohexane in the pore were controlled in acidic medium using KCl and 1,3,5-trimethylbenzene (TMB) as additives in the presence of triblock copolymer P123. It was observed that an increase in Si/P123 molar ratio leads to a gradual increase in the pore diameter. Simultaneously, the 2-D hexagonal mesostructure gradually transforms from open pore system into plugged pore system. The addition of TMB not only expands the pore diameter but also induces the mesophase transformation from 2-D hexagonal mesostructure into mesostructured cellular foam (MCF). Inorganic salt KCl plays a key role in the formation of ordered pore structure. Through adjusting the amount of KCl and TMB, the mesoporous materials with bimodal pore structure call be obtained. Increasing the amount of KCl call increase the pore diameter of the material in the presence of TMB. After complexed with [Rh(cod)Cl](2), the catalytic properties of the trans-(1R,2R)-diaminocycloilexane functionalized mesoporous ethane-silicas with various pore structures were tested in the asymmetric transfer hydrogenation of acetophenone. The catalysts show medium enantioselectivity and high activity. The catalyst with plugged pore structure exhibits the highest catalytic activity among all the catalysts investigated. (C) 2007 Elsevier Inc. All rights reserved.
关键词[WOS]: ORGANIC GROUPS ;  ORGANOSILICAS ;  FRAMEWORK ;  NANOCAPSULES ;  CHIMO ;  OXIDE
语种: 英语
WOS记录号: WOS:000257362100045
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/141202
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:
Jiang, Dongmei,Gao, Jinsuo,Li, Jun,et al. Structural control of mesoporous ethane-silicas with trans-(1R,2R)-diaminocyclohexane in the pore and asymmetric catalysis[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2008,113(1-3):385-392.
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