Oxidation Reactions Catalyzed by Polyoxomolybdate Salts

Ionic compounds containing the polyoxomolybdate anion [Mo6O19]2- and [(n-C4H9)4P]+ (tetrabutylphosphonium), [(n-C4H9)3P(n-C14H29)]+ (tributyl (tetradecyl)phosphonium), [Bmim]+ (1- butyl-3-methylimidazolium) and [Dbmim]+ (1,2-dimethyl-3-butylimidazolium) cations were prepared and characterized, including the determination of three of the solid state structures by singlecrystal X-ray diffraction. These compounds were applied as catalysts for the epoxidation of olefins with urea hydrogen peroxide (UHP) as oxidant in the ionic liquid [Bmim]PF6. Additionally, the oxidation of sulfides to sulfoxides with hydrogen peroxide (H2O2) in several solvents was investigated. The polyoxomolybdate catalysts showed a good performance for epoxidation of olefins as well as for oxidation of sulfides. Furthermore, the catalysts can be recycled several times in oxidation reactions. We present this methodology for the oxidation reaction in a simple, economically, technically, and environmentally benign manner

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An Efficient Oxidation of Sulfides to Sulfones with Urea–Hydrogen Peroxide in the Presence of Phthalic Anhydride in Ethyl Acetate

Synthesis ◽

10.1055/s-0037-1609446 ◽

2018 ◽

Vol 50 (11) ◽

pp. 2231-2234 ◽

Cited By ~ 12

Author(s):

Igor Likhotvorik ◽

Marlon Lutz ◽

Marta Wenzler

Keyword(s):

Hydrogen Peroxide ◽

Ethyl Acetate ◽

Phthalic Anhydride ◽

Oxidation Product ◽

Environmentally Benign ◽

Metal Free ◽

Oxidation Of Sulfides ◽

Urea Hydrogen Peroxide

A metal-free, environmentally benign oxidation of substituted sulfides directly to their corresponding sulfones is described. Using urea-hydrogen peroxide and phthalic anhydride in ethyl acetate clean conversion into the sulfone was achieved without observation of the possible sulfoxide oxidation product.

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A Two-step Electrodeposition of Pd-Cu/Cu2O Nanocomposite on FTO Substrate for Non-enzymatic Hydrogen Peroxide Sensor

Current Analytical Chemistry ◽

10.2174/1573411017666210520153409 ◽

2021 ◽

Vol 17 ◽

Author(s):

Ke Huan ◽

Li Tang ◽

Dongmei Deng ◽

Huan Wang ◽

Xiaojing Si ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Cyclic Voltammetry ◽

Photoelectron Spectroscopy ◽

Chemical Structure ◽

Pd Nanoparticles ◽

Optimal Conditions ◽

Potential Oscillation ◽

X Ray Diffraction ◽

X Ray

Background: Hydrogen peroxide (H2O2) is a common reagent in the production and living, but excessive H2O2 may enhance the danger to the human body. Consequently, it is very important to develop economical, fast and accurate techniques for detecting H2O2. Methods: A simple two-step electrodeposition process was applied to synthesize Pd-Cu/Cu2O nanocomposite for non-enzymatic H2O2 sensor. Cu/Cu2O nanomaterial was firstly electrodeposited on FTO by potential oscillation technique, and then Pd nanoparticles were electrodeposited on Cu/Cu2O nanomaterial by cyclic voltammetry. The chemical structure, component, and morphology of the synthesized Pd-Cu/Cu2O nanocomposite were characterized by X-ray diffraction, scanning electron microscopy and X-ray photoelectron spectroscopy. The electrochemical properties of Pd-Cu/Cu2O nanocomposite were studied by cyclic voltammetry and amperometry. Results: Under optimal conditions, the as-fabricated sensor displayed a broad linear range (5-4000 µM) and low detection limit (1.8 µM) for the determination of H2O2. The proposed sensor showed good selectivity and reproducibility. Meanwhile, the proposed sensor has been successfully applied to detect H2O2 in milk. Conclusion: The Pd-Cu/Cu2O/FTO biosensor exhibits excellent electrochemical activity for H2O2 reduction, which has great potential application in the field of food safety.

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Zur Chemie der l,3,5-Triaza-2-phosphinan-4,6-dione. Teil VI. Darstellung von 1,3,5-Triaza-2 λ3-, 1,3,5-Triaza-2 λ4- und 1,3,5-Triaza-2 λ5-phosphinan-4,6-dionen / Chemistry of the 1,3,5-Triaza-2-phosphinane-4,6-diones. Part VI. Synthesis of 1,3,5-Triaza-2λ3-, 1,3,5-Triaza-2λ4- and 1,3,5-Triaza-2λ5-phosphinane-4,6-diones

Zeitschrift für Naturforschung B ◽

10.1515/znb-1994-0201 ◽

1994 ◽

Vol 49 (2) ◽

pp. 145-164 ◽

Cited By ~ 8

Author(s):

Michael Farkens ◽

Thomas G. Meyer ◽

Ion Neda ◽

Ralf Sonnenburg ◽

Christian Müller ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Solvent Molecule ◽

Oxidation Products ◽

Oxidation Reactions ◽

X Ray Diffraction ◽

Phenyl Azide ◽

X Ray ◽

Trigonal Bipyramidal ◽

Trifluoromethyl Groups ◽

Bifunctional Compound

The reactions of 1,3,5-trimethylbiuret with dicyclohexylaminodichlorophosphine and with pyrrolidinodichlorophosphine furnished the triazaphosphinane-diones 1 and 2. Oxidation reactions of the 2-diorganoam ino-1,3,5-triorgano-1,3,5-triaza-2 λ3-phosphinane-4,6-diones 1, 2, and 4-9, as well as 2-fluoro-1,3,5-trimethyl-1,3,5-triaza-2λ3-phosphinane-4,6-dione 10 with hydrogen peroxide, elemental sulphur, phenyl azide, 1-adamantyl azide,p-nitrobenzoyl azide, tetrachloro-orthobenzoquinone, tetrabromo-orthobenzoquinone, 3,5-di-t-butyl-orthobenzoquinone, and hexafluoroacetone led to the respective oxidation products, 12-32, involving either λ4P or λ5P. In the reaction o f the P(III)C1 derivative 11 with 3-m ethyl-l,5-diphenyl-l,5- bis(trimethylsilyl)biuret the bifunctional compound 33 was produced. The new com pounds 1,2 and 12-33 were characterized via their 1H, 13C and 31P and, where appropriate, 19F NMR spectra. In the case o f the four compounds, 3 (previously described in the literature [2]), 13, 31, and 33, single crystal X-ray diffraction studies were conducted. Unusually for this type of heterocycle 3 displays a 1,4-diplanar ring conformation because o f the bulky aromatic substituents. 13 shows an envelope conformation. The hydrogen peroxide solvent molecule has crystallographic inversion symmetry, but may be disordered. In 31 the coordination geometry at phosphorus is trigonal bipyramidal. The five-membered ring shows a twist conform ation associated with the bulky trifluoromethyl groups. The exocyclic P-N bonds in 33 are unusually long.

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ChemInform Abstract: Oxidation Reactions Using Urea-Hydrogen Peroxide. A Safe Alternative to Anhydrous Hydrogen Peroxide.

ChemInform ◽

10.1002/chin.199105124 ◽

2010 ◽

Vol 22 (5) ◽

pp. no-no ◽

Cited By ~ 1

Author(s):

M. S. COOPER ◽

H. HEANEY ◽

A. J. NEWBOLD ◽

W. R. SANDERSON

Keyword(s):

Hydrogen Peroxide ◽

Oxidation Reactions ◽

Safe Alternative ◽

Urea Hydrogen Peroxide

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A new halide-free efficient reaction-controlled phase-transfer catalyst based on silicotungstate of [(C18H37)2(CH3)2N]3[SiO4H(WO5)3] for olefin epoxidation, oxidation of sulfides and alcohols with hydrogen peroxide

RSC Advances ◽

10.1039/c4ra04036h ◽

2014 ◽

Vol 4 (61) ◽

pp. 32054-32062 ◽

Cited By ~ 14

Author(s):

Baochun Ma ◽

Wei Zhao ◽

Fuming Zhang ◽

Yingshuai Zhang ◽

Songyun Wu ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Phase Transfer ◽

Alcohol Oxidation ◽

Phase Transfer Catalyst ◽

Environmentally Benign ◽

Olefin Epoxidation ◽

Oxidation Of Sulfides ◽

Highly Efficient

A new environmentally benign and highly efficient reaction-controlled phase-transfer catalyst for olefin epoxidation, sulfide and alcohol oxidation was developed.

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