Superior Activity of Isomorphously Substituted MOFs with MIL-100(M=Al, Cr, Fe, In, Sc, V) Structure in the Prins Reaction: Impact of Metal Type

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• 作者：Gema Gó ; mez-Pozuelo ; Carlos Palomino Cabello ; Maksym Opanasenko ; Michal Horá ; ček and Jiř&iacute ; Čejka
• 刊名：ChemPlusChem
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：82
• 期：1
• 页码：152-159
• 全文大小：1128K
• ISSN：2192-6506

文摘

The catalytic behavior of isomorphously substituted MIL-100(M) (M=Al, Cr, Fe, In, Sc, V) is investigated for the synthesis of nopol through the Prins condensation of β-pinene with paraformaldehyde. The large mesoporous cages of the metal–organic frameworks provide a sustainable confinement for the formation of the target product (100 % selectivity for nopol over all materials studied). MIL-100(Sc) and MIL-100(V) exhibit the highest yields (up to 90 %) of nopol after just 20 min from the beginning of the reaction, owing to their high concentrations of accessible Lewis sites possessing intermediate acidity. The high catalytic activity (reaching almost 90 % β-pinene conversion) even upon decreasing the amount of catalyst from 100 to 25 mg (0.025 and 0.0063 g_catalyst mmol_substrate⁻¹, respectively), the stability of its structure, and the possibility to use it several times, make MIL-100(V) a promising material for applications in acid-catalyzed reactions under mild reaction conditions.