| 多相化Salen-Mn(Ⅲ)配合物的制备及其催化性能 |
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| 引用本文： | 何乐芹.多相化Salen-Mn(Ⅲ)配合物的制备及其催化性能[J].河北工业科技,2008,25(2):65-68. |
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| 作者姓名： | 何乐芹 |
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| 作者单位： | 河北工程大学理学院,河北,邯郸,056038 |
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| 摘 要： | 采用化学键联和溶胶-凝胶相结合的方法制备锚链固定的多相化Salen-Mn(Ⅲ)催化剂,利用FT-IR,UV-vis,1H NMR等方法对催化剂及其前体进行表征。考察了该催化剂催化烯烃不对称环氧化反应及其循环使用的性能,实验发现,多相化催化剂催化活性有所降低,但延长了反应时间后,催化顺-β-甲基苯乙烯不对称环氧化的转化率达到95%,其环氧化产物的对映体过量值(ee值)为60%。
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| 关 键 词： | 溶胶-凝胶 手性Salen-Mn(Ⅲ)配合物 多相化 不对称环氧化 非官能化烯烃 |
| 文章编号： | 1008-1534(2008)02-0065-04 |
| 收稿时间： | 2007/12/28 0:00:00 |
| 修稿时间： | 2007年12月28 |
Preparation and enantioselective epoxidation catalysis of anchored heterogeneous Salen-Mn(Ⅲ) complex |
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| HE Le-qin.Preparation and enantioselective epoxidation catalysis of anchored heterogeneous Salen-Mn(Ⅲ) complex[J].Hebei Journal of Industrial Science & Technology,2008,25(2):65-68. |
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| Authors: | HE Le-qin |
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| Institution: | HE Le-qin(College of Sciences,Hebei University of Engineering,H,an Hebei 056038,China) |
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| Abstract: | Heterogeneous Salen-Mn(Ⅲ) catalyst was prepared by chemical linkage and sol-gel entrapping method.The catalyst and its precursor were characterized by means of FT-IR,UV-vis and 1H NMR.It was applied as catalyst in olefins enantioselective epoxidation.It was found that the activity decreased sharply after the chiral complex was immobilized.But by prolonging reaction time in epoxidation of cis-β-methylstyrene,95% conversion and 60% ee were also obtained. |
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| Keywords: | sol-gel chiral Salen-Mn(Ⅲ) complex heterogenization enantioselctive epoxidation non-functional olefin |
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