Nanoporous {Pb₃}-Organic Framework for Catalytic Cycloaddition of CO₂ with Epoxides and Knoevenagel Condensation

Robust Nitro-Functionalized {Zn3}-Organic Framework for Excellent Catalytic Performance on Cycloaddition Reaction of CO2 with Epoxides and Knoevenagel Condensation

“…Due to the economic benefits of recyclability in practical application, consecutive experiments under the optimized reaction conditions were carried out by using benzaldehyde (10 mmol) and malononitrile (20 mmol) as the model substrates. The yield results of BN product catalyzed by repeatedly used NUC-80a are shown in Figure S33, which exhibited that the yield of BN product had a slight downward trend with the increase of cycle time, which might be caused by the loss and contamination of the catalyst in the process of centrifugal separation, cleaning, drying, and transfer. , However, the very slow catalytic deactivation performance of NUC-80a during performed five-cycle experiments proved that it could be recovered and used repeatedly. In addition, the PXRD and the FTIR diagrams for recovered and as-synthesized NUC-80a in Figures S34–S35 exhibited that the link mode between Zn 2+ and organic ligand in the host framework remained intact because of the consistence for main peaks.…”

“…On account of the crystal structure of NUC-80a and speculated mechanism in documented literature, − assumed catalytic mechanism for Knoevenagel condensation is shown in Figure First, the formyl group is activated by the formation of a weak coordination bond between open Zn 2+ site and oxygen atom, making the carbon atom of the formyl group a positive electric site. At the same time, the hydrogen bonds formed between polar nitro groups and the hydrogen atoms on the methylene group of malononitrile, rendering the methylene group of malononitrile a negative electric site.…”

Coordinatively unsaturated 5-nitroisophthalate based cobalt(ii) coordination polymers: efficient catalytic CO2 fixation and Hantzsch condensation

“…In general, catalytic CO 2 cycloaddition reactions take place at the pores of 3D porous metal–organic frameworks (MOFs). 37–39 The catalytic activity of the compound generally increases with the increase in porosity, hence in general three-dimensional porous compounds are much superior to one dimensional/two dimensional compounds. However, to improve the catalytic activity of the one-dimensional/two dimensional compounds one can tune the Lewis acidity of the metal nodes.…”

RSM optimization of Friedel–Crafts C-acylation of para-fluorophenol over the catalysis of phosphomolybdic acid encapsulated in MIL-53 (Fe) metal organic frameworks

“…[11][12][13][14][15][16] These materials' adaptable structure enables a wide range of chemical processes, such as catalysis, photocatalysis, electrocatalysis, adsorption, separation, sensing, drug administration, and organic transformation. [16][17][18][19][20] The acidity of MOFs can be tuned by changing the metal node or ligand's functional group, allowing for the selective activation of specic functional groups in the reactants. 21 In particular, supported phosphomolybdic acid catalysts have been used in various organic reactions, including esterication, transesterication, aldol condensation, Friedel-Cras acylation, etc.…”

“…Metal-organic frameworks (MOFs), a series of porous materials with adjustable chemical and physical characteristics, are one of the most widely used materials for the heterogenization of solid acids. [11][12][13][14][15][16] These materials' adaptable structure enables a wide range of chemical processes, such as catalysis, photocatalysis, electrocatalysis, adsorption, separation, sensing, drug administration, and organic transformation. [16][17][18][19][20] The acidity of MOFs can be tuned by changing the metal node or ligand's functional group, allowing for the selective activation of specic functional groups in the reactants.…”