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Synthesis of hexagonal mesoporous silicates functionalized with amino groups in the pore channels by a co-condensation approach

机译：共缩法用孔通道中氨基官能化的六角形介孔硅酸盐的合成

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摘要

Mesoporous silicates functionalized with amino groups in the pore channels have been made by the co-condensation of tetraethoxyl siloxide (TEOS) with precursors of P-Si through a triblock copolymer-templated sol-gel process under acidic conditions. Poly(alkylene oxide) block copolymer (P123) was eluted by ethanol extraction and template molecules were removed by refluxing the materials in a mixture of DMSO and water. The resulting materials were characterized in detail by FT-IR, XRD, TEM and N-2 adsorption, in order to study the effect of the precursors on the mesoscopic order and pore structure. Evidence of amino groups located in the pore channels was shown through variation of pore size and BET surface area after the amino groups were coupled with benzaldehyde, and TEM images of materials after staining with RuO4. Finally, a comparative study of the catalytic performance of materials SBA-Am-10 and SBA-T-10, obtained by two methods, revealed that the catalyst synthesized by our method gave rapid reaction speed and high yields of flavanone by the Claisen-Schmidt condensation of benzaldehyde and 2'-hydroxyacetophenone.
机译：通过在酸性条件下通过三嵌段共聚物模板晶溶胶 - 凝胶制备的四乙氧基硅烷基硅氧化物（TEOS）与孔通道中的氨基官能团中官能化的中孔硅酸盐已经通过三嵌段共聚物模板溶胶 - 凝胶制备。通过乙醇萃取和通过将材料回流在DMSO和水的混合物中除去乙醇萃取和模板分子洗脱聚（环氧烷）嵌段共聚物（P123）。通过FT-IR，XRD，TEM和N-2吸附详细表征了所得材料，以研究前体对介面序列顺序和孔结构的影响。通过孔径的变化和氨基与苯甲醛偶联后的孔径和BET表面积的变化示出了位于孔通道中的氨基的证据，以及用Ruo4染色后材料的TEM图像。最后，通过两种方法获得的材料SBA-AM-10和SBA-T-10的催化性能的对比研究表明，通过我们的方法合成的催化剂通过Claisen-Schmidt提供了快速的反应速度和高产黄酮的产率苯甲醛和2'-羟基乙酮的凝聚。

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  • 来源
    《RSC Advances》 |2016年第59期|共10页
  • 作者

    Li Yunping; Xiong Wei; Wang Chun; Song Bo; Zhang Guolin;

  • 作者单位

    Chinese Acad Sci Chengdu Inst Biol Chengdu 610041 Peoples R China;

    Chinese Acad Sci Chengdu Inst Biol Chengdu 610041 Peoples R China;

    Chinese Acad Sci Chengdu Inst Biol Chengdu 610041 Peoples R China;

    Chinese Acad Sci Chengdu Inst Biol Chengdu 610041 Peoples R China;

    Chinese Acad Sci Chengdu Inst Biol Chengdu 610041 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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