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A series of nanosized metal-organic frameworks (MOFs) encapsulating different polyoxometalates (POMs) including H3PW4O12, H5PMo12O40, H5PVMo10O40, H5PV2Mo10O40, and H5PV3Mo10O40 was synthesized and used in the selective oxidation of alcohols. The catalyst with a uniform size and morphology offered easy accessibility between substrates and catalyst. At the same time, the MOF ensured that the POM was encapsulated, which could dramatically prevent the assembly of the catalyst. Furthermore, the catalyst showed clear chemoselectivity, which was related to the size or accessibility of the substrates for surface pores. With cetyltrimethyl ammonium bromide aqueous solution as solvent, both improved reaction efficiency and simple recycling of the catalytic system were achieved to afford a green oxidation process. [ABSTRACT FROM AUTHOR]

A novel temperature-dependent ionic liquid based on 2,2,6,6-tetramethylpiperidine-1-oxyl and polyethylene glycol 600 was developed and used in oxidation of alcohols. Various alcohols were oxidized into their corresponding aldehydes or ketones with good yield and selectivity. Owing to the temperature-dependent property of the catalyst, easy recovery was achieved by simple decantation. Supplemental materials are available for this article. Go to the publisher's online edition ofSynthetic Communications® to view the free supplemental file. [ABSTRACT FROM AUTHOR]

Catalytic wet air oxidation process, enable to eliminate organic pollutants with non toxic by-product formation, was investigated in micellar system under room condition. Degradation of a series of aromatic compounds, including aromatic hydrocarbons, benzyl alcohol, benzaldehyde, benzoic acid, and some N-containing compounds was carried out based on molybdovanadophosphoric polyoxometalates [(CH)N(CH)]PVMoO ( x = 1, 2, 3) catalysts and surfactants. Outstanding results (60-96 % degradation efficiencies) were achieved for most of the tested substrates. And the POM micellar catalysts have an excellent stability and can be used as heterogeneous catalysts for about six times. [ABSTRACT FROM AUTHOR]

A novel magnetically recoverable catalyst in which protonated peroxotungstate was immobilized into a network of cross-linked chitosan with a superparamagnetic Fe3O4 core (Fe3O4–CS/HWO) was prepared, characterized and used in oxidation reactions. With H2O2 as oxidant, a wide range of substrates including olefins, sulfides, amines and allylic alcohols could be oxidized selectively, exhibiting a relatively high utilization percentage of H2O2. Due to the existence of peroxotungstate as well as the magnetic core, both improved catalytic performance and facilitated separation were achieved for the reaction process. [ABSTRACT FROM AUTHOR]

A novel temperature-dependent catalytic system involving a TEMPO functionalized imidazolium salt (TBIL) is developed and successfully applied to the selective oxidation of a variety of alcohols. [ABSTRACT FROM AUTHOR]

The title catalyst is successfully applied to the oxidation of a wide set of substrates including olefins, sulfides, amines, and alcohols. [ABSTRACT FROM AUTHOR]

TEMPO supported on fibrous silica nanospheres is shown to be an efficient catalyst for the selective oxidation of (hetero)aromatic, aliphatic, allylic, and secondary alcohols. [ABSTRACT FROM AUTHOR]