Amide-Functionalized In-MOF for Effective Hydrocarbon Separation and CO₂ Catalytic Fixation

Abstract

Energy saving and emission reduction have always been the goal of separation and catalysis pursued in industrial production. Metal−organic frameworks (MOFs) are leading porous crystal materials with unique advantages in these fields. Based on an amide-modified ligand 5-(ethyl oxamate)-isophthalic acid (H 2 EtL), a new porous indium-organic framework (Me 2 NH 2 ) 1.5 [In 1.5 L 2 ]• 2DMF•2H 2 O (1) was synthesized and structurally characterized. The unique porous environment gives it dual functional advantages in separation and catalysis. At room temperature, 1 possesses excellent adsorption capacities for C 2 hydrocarbons and CO 2 , showing good separation behaviors for C 2 hydrocarbons/CO 2 on CH 4 and C 2 H 2 on CO 2 , which is conducive to efficient purification of CH 4 and C 2 H 2 confirmed by the breakthrough experiment. Meanwhile, catalytic results indicate that 1 can be used as a good catalyst for effective fixation of CO 2 under mild conditions to form cyclic carbonates.

Nanocage-Based Tb3+-Organic Framework for Efficiently Catalyzing the Cycloaddition Reaction of CO2 with Epoxides and Knoevenagel Condensation

“…As a result, all reactions involving small molecules showed very high conversion. Furthermore, the results were consistent with previous literature reports: electron-withdrawing groups (−F, −CF 3 , −Cl, −CC) had a positive effect on the reaction (entries 2–4 and 6). − The molecular sizes of all epoxy derivatives are shown in Table S5. In addition, compared with various newly reported nanochannel-based MOF catalysts such as UiO-66-Gua0.2(s), 2, and Rh-PMOF-1 (Table ), − NUC-58a owns a more efficient catalytic activity, which should be due to the satisfactory structural merits from nanoporous channels, enough Lewis acidic sites from {Tb 4 } clusters, plentiful basic sites of N pyridine atoms, and μ 2 –OH groups.…”

Copper(II) Schiff-Base Complex Modified UiO-66-NH2(Zr) Metal–Organic Framework Catalysts for Knoevenagel Condensation–Michael Addition–Cyclization Reactions

“…In recent years, researchers have aimed at designing effective functionalized MOF catalysts with organic and organometallic moieties, instead of applying conventional MOF catalysts based on highly priced metals. − These techniques have been used to modify different types of catalysts, e.g., sulfopyridinium chloride ionic liquid-supported Zr-UiO-66 has been introduced by Zolfigol et al in 2021, indicating that MOF-functionalized catalytic species have been used in organic synthesis and functional group transformations. Therefore, combining the catalytic complexes with MOFs as supports to produce heterogenized catalytic materials is a novel strategy to modify physiochemical properties, pore sizes, surface areas, and topologies of the target porous material moieties. − …”

Copper-Cluster-Based MOF as a Heterogeneous Catalyst for CO2 Chemical Fixation and Azide–Alkyne Cycloaddition

“…As a new class of porous materials, metal–organic frameworks (MOFs) exhibit great potential for CO 2 fixation due to their several advantages of well-ordered aperture, open metal sites, CO 2 adsorption ability, and recyclable utilization. , So far, some MOFs have been explored for catalytically fixing CO 2 into cyclic carbonates; however, high temperature, high CO 2 pressure, and complex separated operation in the procedure set obstacles to their further applications (Table S1). − Thus, exploring efficient and eco-friendly novel MOF-based materials for catalyzing the chemical conversion of CO 2 under mild conditions is of significance and challenging.…”