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题名: An efficient hybrid, nanostructured, epoxidation catalyst: Titanium silsesquioxane-polystyrene copolymer supported on SBA-15
作者: Zhang, Lei;  Abbenhuis, Hendrikus C. L.;  Gerritsen, Gijsbert;  Ni Bhriain, Nollaig;  Magusin, Pieter C. M. M.;  Mezari, Brahim;  Han, Wei;  van Santen, Rutger A.;  Yang, Qihua;  Li, Can
关键词: epoxidation ;  mesoporous materials ;  organic-inorganic hybrid composites ;  polystyrene ;  titanium
刊名: CHEMISTRY-A EUROPEAN JOURNAL
发表日期: 2007
DOI: 10.1002/chem.200600752
卷: 13, 期:4, 页:1210-1221
收录类别: SCI ;  CCR
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: A novel interfacial hybrid epoxidation catalyst was designed with a new immobilization method for homogeneous catalysts by coating an inorganic support with an organic polymer film containing active sites. ne titanium silsesquioxane (TiPOSS) complex, which contains a single-site titanium active center, was immobilized successfully by in-situ copolymerization on a mesoporous SBA-15-supported polystyrene polymer. The resulting hybrid materials exhibit attractive textural properties (highly ordered mesostructure, large specific surface area (> 380 m(2)g(-1)) and pore volume (-0.46 cm(3) g(-1))), and high activity in the epoxidation of alkenes. In the epoxidation of cyclooctene with tert-butyl hydrogen peroxide (TBHP), the hybrid catalysts have rate constants comparable with that of their homogeneous counterpart, and can be recycled at least seven times. They can also catalyze the epoxidation of cyclooctene with aqueous H2O2 as the oxidant. In two-phase reaction media, the catalysts show much higher activity than their homogeneous counterpart due to the hydrophobic environment around the active centers. They behave as interfacial catalysts due to their multifunctionality, that is, the hydrophobicity of polystyrene and the polyhedral oligomeric silsesquioxanes (POSS), and the hydrophilicity of the silica and the mesoporous structure. Combination of the immobilization of homogeneous catalysts on two conventional supports, inorganic solid and organic polymer, is demonstrated to achieve novel heterogeneous catalytic ensembles with the merits of attractive textural properties, tunable surface properties, and optimized environments around the active sites.
关键词[WOS]: RESONANCE RAMAN-SPECTROSCOPY ;  TRANSITION-METAL-COMPLEXES ;  MESOPOROUS SILICA ;  MOLECULAR-SIEVES ;  TS-1 ZEOLITE ;  COMPOSITES ;  CARBON ;  POLYMERIZATION ;  ADSORPTION ;  CHEMISTRY
语种: 英语
WOS记录号: WOS:000243897700017
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/140416
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.Eindhoven Univ Technol, Schuit Inst Catalysis, NL-5600 MB Eindhoven, Netherlands
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, Lei,Abbenhuis, Hendrikus C. L.,Gerritsen, Gijsbert,et al. An efficient hybrid, nanostructured, epoxidation catalyst: Titanium silsesquioxane-polystyrene copolymer supported on SBA-15[J]. CHEMISTRY-A EUROPEAN JOURNAL,2007,13(4):1210-1221.
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