Homogeneous-like solid base catalysts based on pyridine-functionalized swelling porous polymers

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• 作者：Yong-Lai Zhang^a ; ^{yonglaizhang@jlu.edu.cn"" rel=""nofollow} ; Sen Liu^c ; Siyu Liu^c ; Fujian Liu^c ; Haiyan Zhang^c ; Yinyan He^c ; Feng-Shou Xiao^b ; ^{fsxiao@mail.jlu.edu.cn"" rel=""nofollow}
• 关键词：Homogeneous-like ; Base catalysts ; Porous ; Pyridine functionalized ; Polymers ; Swelling
• 刊名：Catalysis Communications
• 出版年：2011
• 出版时间：26 July 2011
• 年：2011
• 卷：12
• 期：13
• 页码：1212-1217
• 全文大小：2037 K

文摘

Reported here is the synthesis of pyridine-functionalized porous polymers, which are designed as homogeneous-like base catalysts. These highly porous catalysts have adjustable pyridine contents, high BET surface area (312–649 m²/g), large pore volume (0.5–2.0 cm³/g) and rapid swelling property, thus they efficiently combined the advantage of both homogeneous and heterogeneous catalysts. The exposure degree of active sites in our homogeneous-like catalysts has been evaluated by Cu²⁺ adsorption, giving similar capacity with homogeneously dissolved poly-4-vinylpyridine. In the Knoevenagel condensation, these materials exhibit excellent activity and stability compared with Mg–Al hydrotalcite and magnesia as well as homogeneous base catalyst of poly-4-vinylpyridine.