Co(II)-amino acid–CaAl-layered double hydroxide composites – Construction and characterization

Varga, Gábor; Sipos, Pál; Pálinkó, István

doi:10.1016/j.molstruc.2018.11.032

Cited by 5 publications

(1 citation statement)

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“…It is precisely because of the adjustable charging properties of amino acids that make them an ideal choice for intercalation [19][20][21]. In recent years, based on the concepts of intercalation assembly, many insights on the structure-property correlation have been obtained from the work in the characterization of layered structures, the establishment of structural models, and the functional development of intercalation assemblies [22][23][24][25][26]. In particular, the powerful materials that can be assembled through intercalation have attracted the attention of researchers from all over the world, and they have shown broad application prospects in the field of catalysis [27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Catalytic Synthesis of Methacrolein via the Condensation of Formaldehyde and Propionaldehyde with L-Proline Intercalated Layered Double Hydroxides

Ju¹,

Li²,

Luo³

2021

Catalysts

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Aldol condensation reactions are very important C–C coupling reactions in organic chemistry. In this study, the catalytic performance of layered double hydroxides (LDHs) in the aldol condensation reaction of formaldehyde (FA) and propionaldehyde (PA) was investigated. The MxAl-LDHs (denoted as re-MxAl–LDHs; M = Ca and Mg; X = 2–4), as heterogeneous basic catalysts toward the aldol condensation reaction, were prepared via a two-step procedure. The catalyst exhibited a high PA conversion (82.59%), but the methacrolein (MAL) selectivity was only 36.01% due to the limitation of the alkali-catalyzed mechanism. On this basis, the direct intercalation of L-proline into LDHs also has been investigated. The influences of several operating conditions, including the temperature, reaction time, and substrate content, on the reaction results were systematically studied, and the optimized reaction conditions were obtained. The optimized Mg3Al–Pro-LDHs catalyst exhibited a much higher MAL selectivity than those of re-MgxAl–LDHs.

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