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题名: Periodic mesoporous organosilicas with trans-(1R,2R)-diaminocyclohexane in the framework: A potential catalytic material for asymmetric reactions
作者: Jiang, DM;  Yang, QH;  Wang, H;  Zhu, GR;  Yang, J;  Li, C
关键词: periodic mesoporous organosilicas ;  chirality ;  diaminocyclohexane ;  asymmetric transfer hydrogenation of ketones
刊名: JOURNAL OF CATALYSIS
发表日期: 2006-04-01
DOI: 10.1016/j.jcat.2006.01.018
卷: 239, 期:1, 页:65-73
收录类别: SCI
文章类型: Article
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: With benzyl group as a linker, trans-(1 R,2 R)-diaminocyclohexane was incorporated into the framework of mesoporous silica through one-step co-condensation of tetramethoxysilane with N.N'-bis[4-(trimethoethoxysilyl)benzyl]-(-)-(1R,2R)-diaminocyclohexane using cetyltrimethylammonium bromide as a structure-directing agent under basic conditions. All materials were fully characterized by X-ray diffraction. N(2) sorption isotherms, transmission electron microscopy, and (13)C and (29)Si cross-polarization magic-angle spinning nuclear magnetic resonance spectroscopy. Coordinated with [Rh(cod)Cl](2,) the material exhibited a TOF Lip to similar to 414 h(-1) with 30% ee for the asymmetric transfer hydrogenation of acetophenone. Various ketones were hydrogenated with different activities and enantioselectivities. An enantioselectivity of about 61% ee was observed in the case of 2-acetylnaphthalene. Moreover, a comparison of the catalytic properties of the materials with benzyl and propyl groups as linkers indicates the importance of the rigidity and electron-withdrawing ability of the linker in the high reaction rate of the catalysts. (c) 2006 Elsevier Inc. All rights reserved.
关键词[WOS]: CHIRAL CATALYSTS ;  MOLECULAR-SIEVES ;  ORGANIC GROUPS ;  MCM-41 ;  LIGANDS ;  SILICA ;  CHIMO ;  OXIDE
语种: 英语
WOS记录号: WOS:000236419800007
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140129
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, DM,Yang, QH,Wang, H,et al. Periodic mesoporous organosilicas with trans-(1R,2R)-diaminocyclohexane in the framework: A potential catalytic material for asymmetric reactions[J]. JOURNAL OF CATALYSIS,2006,239(1):65-73.
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