Special-selective C–H oxidation of toluene to benzaldehyde by a hybrid polyoxometalate photocatalyst including a rare [P6W48Fe6O180]30– anion

Selective Catalytic Oxidation of Toluene to Benzaldehyde: Effect of Aging Time and Calcination Temperature Using CuxZnyO Mixed Metal Oxide Nanoparticles

“…A 91% toluene conversion was observed, but the selectivity to benzaldehyde was found to be as low as 68%. Moreover, this reaction employed N-hydroxyphthalimide and hexafluoropropan-2-ol as promoters, which have to be separated from the product obtained at a later stage [49] [50], which led to a 62.5% benzaldehyde yield. V-Mo-Fe-O mixed oxide yielded a maximum of 40.3% toluene conversion with an 84.5% selectivity towards benzaldehyde.…”

Lacunary {Se4V10} Heteropolyoxovanadate Precursor with Monometal, Metal-Richer-Sandwiched Derivatives {Se8V20M} and {Se8V20M3}: Correlations between the Synthesis, Structure, and Catalytic Property

“…The broad consensus is that there is a direct relationship between the structural characteristics and properties in POM chemistry. , As close family members of the previous Se 8 V 20 M , the present Se 8 V 20 M 3 peers inherit a very similar skeleton structure; thus, they are also expected to demonstrate an effectiveness in the sulfoxidation of thioethers. Therefore, the catalytic activities of Se 8 V 20 M 3 were evaluated for the oxidation of methyl phenyl sulfide at the same reaction conditions as those used for Se 8 V 20 M previously.…”

Polyoxometalate-Incorporated Framework as a Heterogeneous Catalyst for Selective Oxidation of C–H Bonds of Alkylbenzenes

“…40−42 For example, in 2020, Han's group reported a new FeW-DPNDI incorporating the trimer of the Fesubstituted Dawson derivative, which shows high performance in the photocatalytic toluene oxidation under mild conditions. 43 Therefore, the design and development of new nonheme-like diiron site-incorporated POM-based catalysts will be an effective approach to achieving the selective oxidation of C−H bonds. 44 By incorporating Keggin-type PW 45−47 The unique redox properties of {Fe 4 O 2 } with its oxo−iron unit provide sufficient driving force in transforming catalytic precursors into active intermediates and further trigger the oxidation reaction (Scheme 1).…”

“…In 2005, Neumann’s group reported an Fe-substituted POM (POM-FeO 4 – ), which is a powerful oxidant with C–H hydroxylation and C–C epoxidation ability . In addition, the incorporation of POMs and Fe 3+ ions into metal organic frameworks (MOFs) can overcome poor thermal stability, increase the specific surface area, and promote the synergic effects between multifunctional catalytic sites of Fe 3+ and POM units, thus expanding its application range in various selective oxidation catalytic systems. − For example, in 2020, Han’s group reported a new FeW-DPNDI incorporating the trimer of the Fe-substituted Dawson derivative, which shows high performance in the photocatalytic toluene oxidation under mild conditions . Therefore, the design and development of new nonheme-like diiron site-incorporated POM-based catalysts will be an effective approach to achieving the selective oxidation of C–H bonds …”