Synthesis, Characterization, and Catalytic Properties of Two Zwitterionic Hybrid SBA‐15 Mesoporous Silicas
作者:Miao Yang、Feifei Xu、Chang Wang、Xiumei Liu、Peifang Yan、Peipei Li、Urs Welz‐Biermann
DOI:10.1002/ejic.201200498
日期:2012.10
successfully introduced into the silica framework, and the organic contents of 15 % hybrid samples are over 1.0 mmol/g. The presence of a secondary organoamine group enables the hybrid material to be further alkalized to achieve the desired basic properties. The materials were used as catalysts for the aldol condensation of acetone with 4-nitrobenzaldehyde. With a good catalytic performance, the catalyst
含有胺和磺酸基团的两性离子杂化 SBA-15 介孔二氧化硅材料是通过合成的两性离子硅氧烷前体 (ZS) 与四乙氧基硅烷 (TEOS) 共缩合合成的。XRD、TEM 和 N2 吸附-解吸测量表征表明,合成的材料具有有序的细观结构。UV、29Si/13C 交叉极化魔角自旋 (CP-MAS) NMR、X 射线光电子能谱 (XPS) 和元素分析表明,两性离子部分已成功引入二氧化硅骨架,有机成分15% 的混合样品超过 1.0 mmol/g。二级有机胺基团的存在使混合材料能够进一步碱化以获得所需的碱性性能。该材料用作丙酮与4-硝基苯甲醛羟醛缩合的催化剂。该催化剂具有良好的催化性能,易于分离、回收和二次碱化再活化。