Chiral mesoporous organosilicas with R-(+)-Binol integrated in the framework

	Chiral mesoporous organosilicas with R-(+)-Binol integrated in the framework
	Wang, Peiyuan 1,2; Yang, Jie 1; Liu, Jian 1,2; Zhang, Lei 1; Yang, Qihua 1
刊名	microporous and mesoporous materials
	2009
卷号	117 期号:1-2 页码:91-97
关键词	Mesoporous organosilica R-(+)-Binol Chiral PMOs
通讯作者	杨启华
产权排序	1;1
英文摘要	bifunctionalized chiral mesoporous organosilicas with both r-(+)-binol and ethylene moieties integrated in the framework was synthesized by co-condensation of 1,2-bis(trimethoxysilyl)ethane (btme) and (r)-2,2'-dimethoxy-6,6'-di-[(2-trimethoxysilyl)-ethenyl]-1,1'-binaphthyl (r-mmb) in acidic medium using p123 as template for the first time. with the molar fraction of r-mmb increasing from 10 to 20% in the initial mixture, the mesostructure of the material changes from a well-ordered 2d hexagonal mesostructure to a worm-like structure. the materials have a pore diameter in the range of 4.8-5.2 nm with bet surface areas varying from 356 to 894 m(2) g(-1). the results of ft-ir, (13)c and (29)si solid-state nmr shows the integration of the organic groups in the material though some si-c bond cleavage was observed during the synthesis. the circular dichroism spectrum of the material dissolved in naoh confirms that the chirality of r-(+)-binol in the material remains unchanged compared with the molecular precursor. the hydroxyl groups of the r-(+)-binol units were liberated by treatment of the material with bbr(3). the resultant materials were used in ti-promoted asymmetric addition of diethylzinc to benzaldehyde. high catalytic activity (99%) with moderate enantioselectivity (39.7%) was achieved, which also confirms that r-binol was incorporated in the pmos successfully. (c) 2008 elsevier inc. all rights reserved.
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
关键词[WOS]	inorganic hybrid materials ; circular-dichroism ; organic groups ; asymmetric catalysis ; channel walls ; silica ; trans-(1r,2r)-diaminocyclohexane ; binol ; acid ; polycondensation
收录类别	SCI
原文出处	true
语种	英语
WOS记录号	WOS:000262879700011
公开日期	2010-11-30
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/101685]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wang, Peiyuan,Yang, Jie,Liu, Jian,et al. Chiral mesoporous organosilicas with R-(+)-Binol integrated in the framework[J]. microporous and mesoporous materials,2009,117(1-2):91-97.
APA	Wang, Peiyuan,Yang, Jie,Liu, Jian,Zhang, Lei,&Yang, Qihua.(2009).Chiral mesoporous organosilicas with R-(+)-Binol integrated in the framework.microporous and mesoporous materials,117(1-2),91-97.
MLA	Wang, Peiyuan,et al."Chiral mesoporous organosilicas with R-(+)-Binol integrated in the framework".microporous and mesoporous materials 117.1-2(2009):91-97.