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五配位铝强化硅铝固体酸的固体核磁共振研究
王子春1,黄骏2,姜怡娇1,*()
Solid-State NMR Spectroscopy Studies of Enhanced Acidity of Silica-Aluminas Based on Penta-Coordinated Aluminum Species
Zi-chun WANG1,Jun HUANG2,Yi-jiao JIANG1,*()

图7. ASAs中B酸位的结构：(a)仅含有一个Al中心弱B酸位；(b)具有两个Al中心协同作用形成的强B酸位，具有与沸石中酸性桥式羟基相似的B酸强度[8]

Fig.7. Proposed models for BAS on ASAs generated by (a) one Al center per SiOH for moderate BAS, and (b) two Al centers per SiOH group, leading to zeolitic acid strengths[8]