Onium-decavanadate ion-pair complexes as catalysts in the oxidation of hydrocarbons by O2

Csányi, László J.; Jáky, Károly; Dombi, György; Evanics, Ferenc; Dezső, Gergely; Kóta, Zoltán

doi:10.1016/s1381-1169(02)00542-3

Cited by 15 publications

(3 citation statements)

References 10 publications

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“…It has not been determined which oxovanadate species undergo reduction and the possibility that V 10 could be more prone to reduction than the metavanadates is supported by literature observations [74,75]. The ability of V 10 to undergo redox chemistry compatible with biological conditions was confirmed in studies subjecting decavanadate to photoreduction [68,69,76] and protein photocleavage was observed [77].…”

Section: Decavanadate Structure Formation Stability and Reductionmentioning

confidence: 99%

Decavanadate (V10O286-) and oxovanadates: Oxometalates with many biological activities

Aureliano

Crans

2009

Journal of Inorganic Biochemistry

232

250

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Section: Decavanadate Structure Formation Stability and Reductionmentioning

confidence: 99%

Decavanadate (V10O286-) and oxovanadates: Oxometalates with many biological activities

Aureliano

Crans

2009

Journal of Inorganic Biochemistry

232

250

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“…Much of this attention has been focused on engineering materials, nanotechnology, catalysis, supramolecular materials, surface science, magnetochemistry, biochemistry and medicine [5][6][7][8][9][10][11][12][13]. Polyoxometalates are polymeric structures formed by transition metals (i.e., V, Mo, W), with a high oxidation state, bridged by oxygen atoms, in such way that most of them consist of MO 4 tetrahedra or MO 6 octahedra sharing an apex, an edge or even a face; even more, many of these polymers can be obtained by acidification of the solution containing the corresponding monomers yielding structures with various states of condensation and protonation.…”

Section: Introductionmentioning

confidence: 99%

A New Dicationic Ring [(Water)6–(Ammonium)2] Acts as a Building Block for a Supramolecular 3D Assembly of Decavanadate Clusters and 4-(N,N-dimethylamino)pyridinium Ions

et al. 2014

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A new dicationic ring [(water) 6 -(ammonium) 2 ] was found as a building block for a 3D supramolecular assembly of the compound [(CH 3 ) 2 NC 5 H 4 NH] 4 (NH 4 ) 2 [V 10 O 28 ]Á8H 2 O, 1, where (CH 3 ) 2 NC 5 H 4 NH = 4-(N,N-(dimethylamino)pyridinium) (DMAP ? ). The title compound was synthesized and characterized by single crystal X-ray diffraction at 100 K, infrared spectroscopy and thermogravimetric analysis. Compound 1 crystallizes in space group P-1 in the triclinic system with cell parameters: a = 11.1296(4) Å , b = 11.4790(4) Å , c = 11.8691(4) Å , a = 109.631(1)°, b = 100.601(1)°, c = 92.909(1)°and R(F 2 ) = 0.021. The threedimensional supramolecular structure is driven by intermolecular hydrogen bonds OÁÁÁH-N and OÁÁÁH-O from decavanadate anion with NH 4 ? and [(CH 3 ) 2-NC 5 H 4 NH] ? cations, as well as those formed between water molecules and decavanadate ions. The embedded rings consist of two sets of water-water-waterammonium chains joint together in a twisted chair conformation, in which water-ammonium pairs are at the top and bottom sites. The ring is hydrogen bond stabilized and represents to our knowledge, the first example of building block with this composition for a supramolecular structure to be reported.

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“…It is reported that the redox properties of [H3V10O28] 3− , [V12O32] 4− and [V13O34] 3− are different from one another [19]. Although there are some reports on oxidation catalysis for several organic substrates with [H3V10O28] 3− and [V13O34] 3− , the comparison of the activity in these compounds is not investigated [19,35,36]. Each polyoxovanadate retains their anion structures in acetonitrile at 25 °C.…”

Section: Oxidation Of Thioanisolementioning

confidence: 99%

Structure Transformation among Deca-, Dodeca- and Tridecavanadates and Their Properties for Thioanisole Oxidation

2015

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The transformation of three types of polyoxovanadates, {(n-C4H9)4N}3[H3V10O28], {(n-C4H9)4N}4[V12O32] and {(n-C4H9)4N}3[V13O34] have been investigated according to the rational chemical equations, and the best transformation conditions were reported. By the reaction of [H3V10O28] 3− with 0.33 equivalents of {(n-C4H9)4N}OH in acetonitrile at 80 °C, [V12O32] 4− was formed with 92% yield. The reaction in nitroethane with 0.69 equivalents of p-toluenesulfonic acid gave [V13O34] 3− with 91% yield. The 51 V NMR observation of each reaction suggests the complete transformations of [H3V10O28] 3− to [V12O32] 4− and to [V13O34] 3− proceeded without the formation of any byproducts and it provides the reliable synthetic route. Decavanadates were produced by the hydrolysis of [V12O32] 4− or [V13O34] 3−. While the direct transformation of [V13O34] 3− to [V12O32] 4− partly proceeded, the reverse one could not be observed. For the thioanisole oxidation, [V13O34] 3− showed the highest activity of the three.

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Onium-decavanadate ion-pair complexes as catalysts in the oxidation of hydrocarbons by O2

Cited by 15 publications

References 10 publications

Decavanadate (V10O286-) and oxovanadates: Oxometalates with many biological activities

Decavanadate (V10O286-) and oxovanadates: Oxometalates with many biological activities

A New Dicationic Ring [(Water)6–(Ammonium)2] Acts as a Building Block for a Supramolecular 3D Assembly of Decavanadate Clusters and 4-(N,N-dimethylamino)pyridinium Ions

Structure Transformation among Deca-, Dodeca- and Tridecavanadates and Their Properties for Thioanisole Oxidation

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