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题名: Large-pore mesoporous organosilicas functionalized with trans-(1R,2R)-diaminocyclohexane: Synthesis, postmodification, and catalysis
作者: Jiang, Dongmei;  Gao, Jinsuo;  Yang, Qihua;  Yang, Jie;  Li, Can
刊名: CHEMISTRY OF MATERIALS
发表日期: 2006-12-12
DOI: 10.1021/cm0613307
卷: 18, 期:25, 页:6012-6018
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: Large-pore mesoporous ethane-silicas functionalized with trans-(1R, 2R)-diaminocyclohexane were synthesized in an acidic medium by one-step co-condensation of 1,2-bis(trimethoxysilyl) ethane and N-[(trimethoxysilyl)benzyl]-(-)-(1R,2R)-diaminocyclohexane using triblock copolymer P123 as template. The postmodification of trans-(1R,2R)-diaminocyclohexane in the pore of the mesoporous ethane-silicas was further demonstrated by reaction with p-toluenesulfonyl chloride. The modified material (complexed with [RhCp*Cl-2](2)) exhibits much higher conversion and ee [53% conversion with 68% ee (R)] than the original material [18% conversion with 38% ee ( S)] for the asymmetric transfer hydrogenation of acetophenone under air atmosphere in HCOONa-H2O. Various aromatic ketones can be converted to the corresponding chiral alcohol with moderate to good enantioselectivities [18-81% ee (R)]. The cocondensation method associated with the postmodification method is one of the alternatives for the synthesis of mesoporous materials containing new functionalities.
关键词[WOS]: ASYMMETRIC TRANSFER HYDROGENATION ;  INTERNAL SILICA NANOCAPSULES ;  AROMATIC KETONES ;  COPOLYMER ;  FRAMEWORK ;  TRIBLOCK ;  WATER ;  LIGANDS ;  WALLS ;  CHIMO
语种: 英语
WOS记录号: WOS:000242515600031
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140141
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,Yang, Qihua,et al. Large-pore mesoporous organosilicas functionalized with trans-(1R,2R)-diaminocyclohexane: Synthesis, postmodification, and catalysis[J]. CHEMISTRY OF MATERIALS,2006,18(25):6012-6018.
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