| 第 45 卷第 3 期 |  | Vol. 45 No. 3 | | 2015 年 6 月 | Jun 2015 |
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所屬欄目：功能材料
手性Salen-Co配合物在納米Silica和殼核納米Silica上的接枝及環(huán)氧化催化性能的研究 |
| 周建波，曾 明，伏再輝，陽(yáng) 科，崔小瑩
（長(cháng)沙醫學(xué)院 基礎醫學(xué)系，湖南 長(cháng)沙 410219） |
| 摘 要：過(guò)共價(jià)鍵將手性Salen-Co（Ⅲ）配合物接枝到納米Silica和殼-核納米Silica表面上制備固相催化劑，并且用紅外光譜（FT-IR）、熱重分析（TG-DTA）、透射電鏡等表征手段對已制備的催化劑進(jìn)行了表征，結果證實(shí)手性Salen-Co配合物成功接枝到了納米Silica和殼-核納米Silica表面。以反式二苯乙烯為反應底物，考察了所得固相催化劑的環(huán)氧化催化活性、選擇性、e.e.值（對映體過(guò)量）和重復使用性能，從催化結果來(lái)看所得固相催化劑有一定的不對稱(chēng)催化活性，重復使用性能也比較好。 |
| 關(guān)鍵詞：Salen-Co（Ⅲ）；接枝；納米Silica；殼-核納米Silica |
| 中圖分類(lèi)號：TQ426.6 文獻標識碼：A 文章編號：1009-9212（2015）03-0042-06 |
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| The Catalytic Epoxidation of Olefins Using Chiral Salen-Co Complexes Grafted Nano-silicas |
| ZHOU Jian-bo, ZENG Ming, FU Zai-hui, YANG Ke, CUI Xiao-ying
(Changsha Medical University of Basic Medical System, Changsha 410219, China) |
| Abstract：The chiral salen-Co complexes were grafted onto nano-silica and core-shell nano-silica by covalent bond; TG-DTA, FT-IR, and transmission electron microscopy were used for characterization of the immobilized salen complexes. The results confirmed that the chiral salen-Co complexes were successfully attached to the surfaces of nano-silica and the core-shell nano-silica. The catalytic activity, selectivity and e.e% were also evaluated using the catalytic epoxidation reaction of E-stilbene. It was found that the immobilized catalysts showed higher conversion and better selectivity of E-stilbene. The heterogeneous catalysts after epoxidation could be recycled without significant loss of activity. These indicated that the chiral salen-Co complexes have been steadily bonded onto the nano-silica by covalent bond. |
| Key words：salen-Co(Ⅲ); graft; nano-silica; core-shell nano-silica |
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基金項目： 湖南省教育廳基金資助項目（13C0455），湖南省科技廳科技計劃項目 （2014SK3025）。
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作者簡(jiǎn)介： 周建波（1979-），女，湖南衡陽(yáng)人，講師，主要從事不對稱(chēng)催化合成（E-mail：229530464@qq.com）。
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收稿日期： 2015-04-3
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