Preparation and synergetic catalytic effects of amino-functionalized MCM-41 catalysts |
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Authors: | WanZhong Lang Bo Su YaJun Guo LianFeng Chu |
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Institution: | 1. Key Laboratory of Resource Chemistry of Ministry of Education; Shanghai Key Laboratory of Rare Earth Functional Materials; College of Life and Environmental Science, Shanghai Normal University, Shanghai, 200234, China
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Abstract: | Four amine functionalized mesoporous catalysts were synthesized by grafting primary, dualistic and two secondary amines onto the channel walls of mesoporous silica, MCM-41. We examined the effects of organoamine loading amount on the acid-base synergism of the catalysts in the self-condensation reaction of n-butanal, a Knoevenagel condensation and a Henry reaction. We observed the balance of the amine and residual silanol amounts is crucial to the catalytic performances of the functionalized mesoporous catalysts. An optimum organoamine loading amount exists, which is dependent on the organoamine type. There is little difference in the optimum organoamine loading amount between different reactions. The secondary organoamine functionalized MCM-41 exhibits the best catalytic performance in the experimental range. |
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Keywords: | MCM-41 acid-base synergism organoamine n-butanal |
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