Synthesis and characterization of SBA-polyperoxyacid: An efficient heterogeneous solid peroxyacid catalyst for epoxidation of alkenes
Synthesis and characterization of SBA-polyperoxyacid: An efficient heterogeneous solid peroxyacid catalyst for epoxidation of alkenes
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DOI：
10.1016/j.catcom.2013.11.022
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发表时间：
2014-02
影响因子：
3.7
通讯作者：
J. Davarpanah;A. Kiasat
中科院分区：
文献类型：
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作者：
J. Davarpanah;A. Kiasat
以SBA-丙基氯（SBA-Cl）为原料，经咪唑亲核取代，再与烯丙基氯季铵化，合成了SBA-丙基-3-烯丙基咪唑氯盐（SBA-Im-Allyl）。在此基础上，通过将聚丙烯酸锚定并氧化到SBA-Im-Allyl表面，合成了一种新型的固体聚过氧酸。采用FT-IR、SEM、TGA-DTG和BET等方法对固体聚过氧酸进行了表征。这种新的催化剂不会从载体上浸出，并且可以通过用过氧化氢溶液处理来回收，并且还通过碘量滴定法测量催化剂的负载量。固体聚过氧酸对烯烃的环氧化反应具有良好的催化活性。
SBA-propy-3-allyl-imidazolium chloride (SBA-Im-Allyl) was easily prepared by nucleophilic substitution of SBA-propylchloride (SBA-Cl) with imidazole and then quaternization with allyl chloride. Then, a novel solid polyperoxyacid was synthesized by anchoring and oxidation of polyacrylic acid onto the surface of SBA-Im-Allyl. FT-IR, SEM, TGA–DTG and BET have been used to characterize the solid polyperoxyacid. This new catalyst did not leach from the support and can be recycled by treatment with hydrogen peroxide solution, and also loading of the catalyst was measured by iodometric titration. The solid polyperoxyacid shows efficient catalytic activity toward epoxidation of alkenes.