| 介孔分子筛表面丁基锡的制备和性能 |
| Preparation and Properties of Surface Butyltin of Mesoporous Molecular Sieves |
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| 摘要: 在高真空系统中研究了MCM-41介孔分子筛与四丁基锡的反应,并用元素分析、气体容量分析、XRD、FTIR、 13C及 119Sn MAS NMR和氮气及烃吸附等方法表征了产物的组成、结构和性质。结果表明,MCM-41的表面羟基与四丁基锡能在150℃发生反应,在200℃预脱水处理后的MCM-41上生成组成为(≡Si-O) xSn(n-Bu) 4-x的表面混合物,而在500℃预脱水处理后的MCM-41上则得到组成为≡Si-O-Sn(n-Bu)3的表面单接枝物种;表面接枝丁基锡物种导致MCM-41的孔道尺寸变小,表面组成改变,从而引起对烷烃的吸附行为发生变化。 |
| 关键词: 介孔分子筛 四丁基锡 接枝反应 金属有机化学 |
| 基金项目: |
| Abstract: Reaction of MCM-41 mesoporous molecular sieves with tetrabutyl tin was studied in a high vacuum. The composition, structure and properties of the resulted materials were characterized by using element analysis, gas volumetry analysis, XRD, FTIR, 13C and 119Sn MAS NMR, adsorption of nitrogen and hydrocarbons etc., respec-tively. The results showed that the reaction leads to formation of multigrafted species (≡Si-O) xSn(n-Bu) 4-x for MCM-41 dehydrated at 200℃, and to formation of monografted species ≡Si-OSn(n-Bu)3 for MCM-41 dehydrated at 500℃. Grafting butyltin species onto the surface resulted in reduction of MCM-41 pore size and modification of adsorptive performance of MCM-41 to hydrocarbons. |
| Keywords: mesoporous silica tetrabutyltin grafting reaction organometallic chemistry |
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| 王绪绪,陈旬,傅贤智.介孔分子筛表面丁基锡的制备和性能[J].无机化学学报,2002,18(5):465-468. |
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