【摘要】 1H超高速魔角旋转固体核磁共振技术可直接和定量地检测SBA 15表面存在的 3种硅羟基 ,即单羟基(Hs) ,氢键羟基 (Hh)和双羟基 (Hg) .此方法可用于准确跟踪介孔分子筛的嫁接和改性过程 .1H核磁共振亦发现 ,在不同的萃取条件下 ,多种有机溶剂不能完全除去模板剂 ,焙烧是在嫁接前除去模板剂的有效方法 .更多还原

【Abstract】 Three types of hydroxyl groups,which are attributed to single(H s),hydrogen bonded (H h) and geminal SiOH (H g) in mesoporous molecular sieve SBA 15 can be directly and quantitatively observed by 1H ultrafast MAS NMR spectroscopy. This method can be used to follow accurately the graft and modification process of mesoporous molecular sieve. 1H ultrafast MAS NMR also proves that the extraction with a number of organic solvents under different extraction condition cannot remove template molecules completely. Calcination is still the most efficient method to remove the template before graft.更多还原