Amino-functionalized zirconium and cerium MOFs: Catalysts for visible light induced aerobic oxidation of benzylic alcohols and microwaves assisted N-Alkylation of amines

Cerium versus zirconium UiO66 metal–organic frameworks coupled with CdS for H2 evolution under visible light

“…Cerium-substituted MOFs are of special interest, because of the Ce 4+/3+ redox chemsitry. [14][15][16][17][18] Different from Zr-UiO-66, Ce-UiO-66 is not only stable in water, 19 but also absorbs light at wavelengths up to 500 nm. A theoretical calculation reveals that the unoccupied Zr 4d and Ce 4f orbitals are located above and below the unoccupied BDC orbitals, respectively.…”

Solvent/metal-free benzimidazolium-based carboxyl-functionalized porphyrin photocatalysts for the room-temperature alkylation of amines under the irradiation of visible light

“…Valverde-González et al have reported a Zr-Ce metal oxide as a heterogeneous catalyst under visible light irradiation for the aerobic oxidation of the benzylic alcohol N-alkylation reaction. 44 Various photocatalysis approaches were described for N-alkylation reactions using TiO 2 NPs 45 Ag@TiO 2 , 46 Cu-Mo/TiO 2 , 47 Pd/TiO 2 NPs, 48 TiO 2 @Pd-NPs 49 and other TiO 2 -NPs. 50,51 Moreover, these approaches suffer from the drawbacks of the usage of stoichiometric amounts of harmful and costly substrates and the generation of a majority of risky byproducts.…”

“…Valverde-González et al have reported a Zr–Ce metal oxide as a heterogeneous catalyst under visible light irradiation for the aerobic oxidation of the benzylic alcohol N -alkylation reaction. 44 Various photocatalysis approaches were described for N -alkylation reactions using TiO 2 NPs 45 Ag@TiO 2 , 46 Cu–Mo/TiO 2 , 47 Pd/TiO 2 NPs, 48 TiO 2 @Pd-NPs 49 and other TiO 2 -NPs. 50,51…”

Syntheses and Redox Properties of Carboxylate-Ligated Hexanuclear Ce(IV) Clusters and Their Photoinduced Homolysis of the Ce(IV)–Ligand Covalent Bond

“…Among the oxo-bridged metal clusters, oxo-bridged cerium clusters are widely applied as catalysts in various organic syntheses by taking advantage of the following characteristics: two stable Ce­(III) and Ce­(IV) oxidation states, high oxophilicity, and the narrow band gap found for cerium oxide . For example, oxo-bridged cerium clusters were utilized for the catalytic oxidation of organic compounds under aerobic conditions as well as photocatalytic water splitting and CO 2 fixation into organic compounds under blue LED or UV light irradiation. Growing interest in their catalytic performance has prompted studies of the effects of the supporting ligands around the oxo-bridged cerium entities to clarify their spectroscopic and redox coupling properties.…”