Phosphomolybdic acid hydrate encapsulated in MIL-53 (Fe): a novel heterogeneous heteropoly acid catalyst for ultrasound-assisted regioselective nitration of phenols

Abstract

In this study, a heterogeneous catalyst, PMA@MIL-53 (Fe) (MIL ⇒ Matériaux de l'Institut Lavoisier), has been used to replace the usual mineral acids such as sulfuric acid.

A sustainable protocol for selective alcohols oxidation using a novel iron-based metal organic framework (MOF-BASU1)

“…23 MOFs not only have a higher level of activation and stability than other classes of porous materials, but can also change the morphology and size of cavities uncomplicatedly, and this has become an advantage in terms of separation and greater selectivity in their applications. [24][25][26][27] Designing and synthesizing new molecular scaffolds with unique structural and biological properties that increase their capability and selectivity is an interesting challenge. Nowadays, sulfonamides, with unique features, such as strong chemical/ thermal stability, are considered as new ligands by the chemical community.…”

“…23 MOFs not only have a higher level of activation and stability than other classes of porous materials, but can also change the morphology and size of cavities uncomplicatedly, and this has become an advantage in terms of separation and greater selectivity in their applications. 24–27…”

Schiff Base Complex of Copper Immobilized on Core–Shell Magnetic Nanoparticles Catalyzed One-Pot Syntheses of Polyhydroquinoline Derivatives under Mild Conditions Supported by a DFT Study

“…Sustainable approaches, particularly in green chemistry, have gained significance in the pharmaceutical and chemical industries. Green chemistry benefits organic synthesis by minimizing environmental impact, reducing waste, enhancing efficiency, and promoting the production of safer chemicals. − It also plays a key role in catalyst design and synthesis, preventing pollution, and enabling economically important reactions. Despite advancements, continued research is needed for catalysts based on relevant knowledge.…”

Targeted development of sustainable green catalysts for regioselective acylation of aromatic ethers with carboxylic acidsviachlorosulfonic acid coated on poly(guanidine–triazine–sulfonamide) grafted quartz–γ-Fe2O3

“…[19][20][21] In this respect, although inorganic and organic acid catalysts have found widespread applications, hazardous acids may leach into the desired product. [22][23][24][25] This leakage is one of the disadvantages in using heterogeneous acid-based catalysts in sustainable catalysis. 26,27 One possible way to deal with this problem is to couple heterogeneous catalytic materials with homogeneous acid catalysts.…”