Preparation of amine-immobilized solid base catalysts by plasma polymerization of 1,2-diaminocyclohexane

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• 作者：Sun-Jung Song^a ; Kyoung Woon Jung^a ; Myung Duck Cho^a ; Eun Ju Yang^a ; Hye Jeong Sim^a ; Mi-Young Kim^b ; Hoi-Gu Jang^c ; Gon Seo^c ; Dong Lyun Cho^a ; ^{dlcho@chonnam.ac.kr}
• 关键词：Plasma polymerization ; 1 ; 2-Diaminocyclohexane ; Amine-immobilized ; Solid base catalysts
• 刊名：Applied Catalysis A ; General
• 出版年：2012
• 期刊代码：4_0926860x
• 类别：ch
• 出版时间：2 July, 2012
• 卷：429-430
• 期：Complete
• 页码：85-91
• 文件大小：564 K

摘要

Thin films were deposited onto silica-alumina powders by plasma polymerization of 1,2-diaminocyclohexane to prepare amine-immobilized solid base catalysts. The existence of amine moieties in the films was confirmed by solid-state ¹³C NMR, FT/IR, and XPS analyses. The silica-alumina powders deposited with the films showed strong base catalytic activity when evaluated based on the adsorption/desorption pattern of acidic gases (NO₂ and CO₂) and the conversion of benzaldehyde in Knoevenagel condensation reaction between benzaldehyde and ethylcynoacetate. Adsorbed acidic gases still remained even at 400 掳C due to strong chemisorptions. When the plasma polymerization was carried out by a two-step process, the conversion was as high as 91.2%and adhesion of the films could be improved. The conversion was 82.0%even after the repeated use for 3 times when the films were deposited by the two-step process.