| 张鲁西,伏再辉.中孔载体上组装Ti催化活性中心的研究：Ⅲ.中孔分子筛与钛化合物键 …[J].分子催化,2000,(1):55-59 |
| 中孔载体上组装Ti催化活性中心的研究：Ⅲ.中孔分子筛与钛化合物键 … |
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| 修订日期：1999-04-27 |
| DOI： |
| 中文关键词: 中孔分子筛 钛配合物 苯乙烯 环氧化 红外光谱 |
| 英文关键词:Mesoporous,Molecular sieves,HMS,Bonding,IR characterization,Catalytic oxidation,Epoxidation of styrene |
| 基金项目:国家自然科学基金资助课题（29773013）. |
| 张鲁西 伏再辉 |
| [1]湖南师范大学实验中心 [2]湖南师范大学精细催化合成研究所 |
| 摘要点击次数: 1079 |
| 全文下载次数: 35 |
| 中文摘要: |
| ＦＴ－ＩＲ表征了中孔分子筛（ＨＭＳ）载体与钛酸异丙酯，四氯化钛、酒石酸的键合作用，这种键合作用均会诱导载体的硅氧四面体发生弱的畸变，而在９６０ｃｍ＾－１附近出现吸收谱带，键合温度、溶剂以及钛源均会影响谱带的位置和强度。是的钛负载量与该谱带强度成正比。催化苯乙烯环氧化结果表明，键合温度、钛源、钛中心配位环境对键合催人 和环氧化选择性均有较大的影响。 |
| 英文摘要: |
| The exchange interactions between HMS mesoporous molecular sieve and Ti(O i Pr) 4, TiCl 4 or tartaric acid were characterized by FT IR. The results indicate that the bonding interacting (host guest interaction) of HMS with guest molecules can induce the distortion of Si-O tetrahedron, and leads to the appearance of 960 cm -1 band, The solvent, Ti source and, especially, exchange temperature have significant influences on the host guest interaction . The Ti loadings have a linear relation with the intensities of the distortion band. The results of styrene epoxidation with TBHP over these catalysts indicate that the exchange temperature , Ti source, and the coordination environment of the Ti active centers have significant influences on the activity and the selectivity of these assembled catalysts. |
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