Investigation of Catalytic Characterization of Two-Dimensional Molecular Space with Regular Ammonium and Pyridine Groups

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• 作者：Jianming Chen ; Ken Yao ; Wenfeng Shangguan ; Jian Yuan
• 刊名：Langmuir
• 出版年：2009
• 出版时间：May 19, 2009
• 年：2009
• 卷：25
• 期：10
• 页码：5993-5999
• 全文大小：791K
• 年卷期：v.25,no.10(May 19, 2009)
• ISSN：1520-5827

文摘

Novel two-dimensional molecular space with regular pyridine groups layered pyridine-4-amidepropylsilica (PAPS) and pyridine-4-amidephenylsilica (PAPhS) were successfully synthesized through grafting pyridine groups in the layer structure of two-dimensional molecular space with regular ammonium groups layered aminopropylsilica (ATMS-DS) and layered aminophenylsilica (APhTMS-DS). The two-dimensional structures were kept after grafting reaction of pyridine groups in PAPS and PAPhS. The catalytic potentials of two-dimensional molecular space with regular ammonium and pyridine groups were investigated. The catalytic capability of APhTMS-DS, PAPS, and PAPhS was confirmed through Knoevenagel condensation reactions. Knoevenagel condensation of aromatic aldehydes with malononitrile was not observed in the presence of ATMS-DS. Otherwise, the lower yield of Knoevenagel condensation of higher active 2-chlorobenzaldehyde with malononitrile in the presence of APhTMS-DS, PAPS, and PAPhS indicated the potential of the two-dimensional molecular space with regular catalyst molecules on influencing catalysis processes utilizing the chemical and geometrical limits.