Imidazole immobilization in nanopores of silicas and niobiosilicates SBA-15 and MCF—A new concept towards creation of basicity

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• 作者：Dorota Kryszak^a ; Katarzyna Stawicka^a ; ^b ; ^{kasiakob@o2.pl} ; Vanesa Calvino-Casilda^b ; ^{vcalvino@ccia.uned.es} ; Rosa Martin-Aranda^b ; Maria Ziolek^a
• 关键词：Mesoporous silicas ; Niobiosilicates ; ClPTMS ; Imidazole ; Knoevenagel condensation
• 刊名：Applied Catalysis A: General
• 出版年：2017
• 出版时间：5 February 2017
• 年：2017
• 卷：531
• 期：Complete
• 页码：139-150
• 全文大小：1363 K
• 卷排序：531

文摘

A novelty is growth of activity in Knoevenagel reaction by Nb inclusion to supports and estimation of imidazole stability. MCF structure increases effectivity of imidazole anchoring and activity in Knoevenagel reaction in comparison to SBA-15. Activity is determined by activation temperature. For the higher temperature the lower conversion was gained. The new niobiosilicates can be used in acid-base catalyzed reactions and the temperature treatment controls activity.