Superior Activity of Isomorphously Substituted MOFs with MIL‐100(M=Al, Cr, Fe, In, Sc, V) Structure in the Prins Reaction: Impact of Metal Type1. Issue 1 (21st October 2016)

• Record Type: Journal Article
• Authors: Gómez‐Pozuelo, Gema; Cabello, Carlos Palomino; Opanasenko, Maksym; Horáček, Michal; Čejka, Jiří
• Is Part Of: ChemPlusChem. Volume 82:Issue 1(2017)
• Page Start: 152
• Page End: 159
• Publication Date: 2016-10-21
• Subjects: activation energy -- heterogeneous catalysis -- metal–organic frameworks -- nopol synthesis -- Prins reaction; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.201600456
• Languages: English
• ISSNs: 2192-6506

Abstract

Abstract: 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 gcatalyst mmolsubstrate −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. Abstract : Superior catalytic performance of MIL‐100(V) : The catalytic performance of the MIL‐100(M) isostructural series (M=Al, Cr, Fe, In, Sc, V) has been investigated for the Prins condensation of β‐pinene and paraformaldehyde to produce nopol (see figure). The catalytic activity of MIL‐100(M) correlates linearly with the concentration of accessible Lewis acid sites. Its high activity, stability, and recyclability make MIL‐100(V) a promising material for application in various heterogeneous catalytic processes.