Fluorooxoperoxo complexes of vanadium(V)

Schwendt, Peter; Joniaková, D.

doi:10.1016/s0277-5387(00)88109-7

Cited by 14 publications

(8 citation statements)

References 9 publications

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“…For all three compounds, the bands between 247 and 285 cm –1 are assigned to bending vibrations of (UO 2 ) 2+ uranyl ions . The bands from 852 to 914 are assigned to antisymmetric stretching vibrations of (UO 2 ) 2+ uranyl ions;, however, other studies suggests these bands are due to stretching vibrations of VO 3 , …”

Section: Resultsmentioning

confidence: 82%

“…The vibrations from the equatorial U–O bonds are in the range from 450 to 552 cm –1 . [41a] The bands from 335 to 400, 697 to 755, and 922 to 961 are assigned to bending vibrations of VO 3 , antisymmetric stretching of V–O–V and VO 3 , and symmetric stretching mode of VO 3 respectively 41b] Detailed assignments of all the peaks are summarized in Table S1 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

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Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO₂)(V₂O₇) (M = Ca, Sr) and Sr₃(UO₂)(V₂O₇)₂

Chong

Aksenov

et al. 2019

Zeitschrift anorg allge chemie

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Uranyl vanadate compounds with divalent cations, M(UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2, were synthesized by flux crystal growth, and their crystal structures were solved using single‐crystal X‐ray diffraction data. Ca(UO2)V2O7 and Sr(UO2)V2O7 were synthesized from reactants with molar ratios M:U:V of 1:1:2 and identical heating conditions, and increasing the M:U:V ratio to 3:1:4 resulted in Sr3(UO2)(V2O7)2. Crystallographic data for M(UO2)V2O7 compounds are: a = 7.1774(18) Å, b = 6.7753(17) Å, c = 8.308(2) Å; V = 404.01(18) Å3; space group Pmn21, Z = 2 for Ca; a = 13.4816(11) Å, b = 7.3218(6) Å, c = 8.4886(7) Å; V = 837.91(12) Å3; space group Pnma, Z = 4 for Sr. Compound Sr3(UO2)(V2O7)2 has a = 6.891(3) Å, b = 7.171(3) Å, c = 14.696(6) Å, α = 85.201(4)˚, β = 78.003(4)˚, γ = 89.188(4)˚; V = 707.9(5) Å3; space group P1, Z = 2. The framework structure of Sr(UO2)(V2O7) is related to that of Pb(UO2)(V2O7) reported previously, while that of Ca(UO2)(V2O7) has a different topology. The topological polymorphism of the [(UO2)(V2O7)]‐type framework may be due to the differing ionic radii of the guest M2+ cations. Compound Sr3(UO2)(V2O7)2 has a modular structure based on two different types of electroneutral layers: [Sr(UO2)(V2O7)] and [Sr2(V2O7)]. Structural complexities were calculated, and Raman spectra were collected and their peaks were assigned.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO₂)(V₂O₇) (M = Ca, Sr) and Sr₃(UO₂)(V₂O₇)₂

Chong

Aksenov

et al. 2019

Zeitschrift anorg allge chemie

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“…Notably, in the presence of KF, fluoride coordination to vanadium likely occurs, leading to V-fluorooxoperoxido complex [46,47]. UV-vis absorption spectrum of V-monoperoxido complex in aqueous solution shows appreciable variations in the presence of KF, possibly supporting fluoride coordination to vanadium ( Figure S1).…”

Section: Resultsmentioning

confidence: 97%

Sustainable Highly Selective Toluene Oxidation to Benzaldehyde

et al. 2021

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Thanks to the well-recognized role of benzaldehyde in industry, nowadays the research of new and sustainable approaches to selectively synthesize such an interesting product is receiving great attention from the chemists’ community. In this paper, a V-based catalytic biphasic system is adopted to perform toluene oxidation to benzaldehyde. Importantly, to pursue sustainability, organic solvents have been avoided, so toluene is used as substrate and co-solvent, together with water. Also, the use of hydrophobic ionic liquids has been explored. To perform oxidation, NH4VO3 catalyst, H2O2, and a safe and inexpensive co-catalyst are used. Among the tested co-catalysts, KF and O2 were found to be the best choice, to guarantee good yields, in mild reaction conditions. In fact, with such a sustainable method, up to 30% of benzaldehyde can be obtained at 60 °C and, more interestingly, the oxidative system can be recharged, raising-up the yield. The entire process results highly selective, since no traces of benzyl alcohol or benzoic acid are detected. Hence, it constitutes a very appealing synthetic route, even suitable to be easily scaled-up at an industrial level.

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“…The bending vibrations of O‐VO 3 group and V–O‐V bridges are observed in the region of 206 to 265 cm –1 . The Raman bands observed below 200 cm –1 can be attributed to the lattice mode vibrations , . The Raman band assignments of Ba 3 A(V 2 O 7 ) 2 (A = Mg, Zn) ceramics are compiled in Table .…”

Section: Resultsmentioning

confidence: 99%

Preparation and Microwave Dielectric Properties of Ba₃A(V₂O₇)₂ (A = Mg, Zn) Ceramics for ULTCC Applications

et al. 2019

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Single phase Ba3A(V2O7)2 (A = Mg, Zn) ceramics were prepared through a conventional solid‐state ceramic route. The structural and microwave dielectric properties of Ba3A(V2O7)2 (A = Mg, Zn) compositions have been investigated. Powder X‐ray diffraction and Raman spectroscopic studies have been carried out to confirm the phase purity and crystal structure of prepared Ba3A(V2O7)2 (A = Mg, Zn) compositions. Scanning electron microscopic images for Ba3A(V2O7)2 (A = Mg, Zn) ceramics exhibit a homogeneous and dense microstructure. The microwave dielectric properties of the samples were studied using Hakki–Coleman post resonator and cavity perturbation methods. Ba3Mg(V2O7)2 ceramic has a dielectric constant (εr) of 10.3, quality factor (Q x f ) of 43400 GHz and temperature coefficient of resonant frequency (τf) of –46.87 ppm/°C at 660 °C for 1 h. Ba3Zn(V2O7)2 shows a dielectric constant of 10.8, quality factor of 46400 GHz and temperature coefficient of resonant frequency of –78.1 ppm/°C at 660 °C for 1 h. Ba3A(V2O7)2 (A = Mg, Zn) ceramics show excellent chemical compatibility with Al metal electrodes.

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Fluorooxoperoxo complexes of vanadium(V)

Cited by 14 publications

References 9 publications

Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO₂)(V₂O₇) (M = Ca, Sr) and Sr₃(UO₂)(V₂O₇)₂

Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO₂)(V₂O₇) (M = Ca, Sr) and Sr₃(UO₂)(V₂O₇)₂

Sustainable Highly Selective Toluene Oxidation to Benzaldehyde

Preparation and Microwave Dielectric Properties of Ba₃A(V₂O₇)₂ (A = Mg, Zn) Ceramics for ULTCC Applications

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Fluorooxoperoxo complexes of vanadium(V)

Cited by 14 publications

References 9 publications

Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2

Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO2)(V2O7) (M = Ca, Sr) and Sr3(UO2)(V2O7)2

Sustainable Highly Selective Toluene Oxidation to Benzaldehyde

Preparation and Microwave Dielectric Properties of Ba3A(V2O7)2 (A = Mg, Zn) Ceramics for ULTCC Applications

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Product

Resources

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Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO₂)(V₂O₇) (M = Ca, Sr) and Sr₃(UO₂)(V₂O₇)₂

Framework Polymorphism and Modular Crystal Structures of Uranyl Vanadates of Divalent Cations: Synthesis and Characterization of M(UO₂)(V₂O₇) (M = Ca, Sr) and Sr₃(UO₂)(V₂O₇)₂

Preparation and Microwave Dielectric Properties of Ba₃A(V₂O₇)₂ (A = Mg, Zn) Ceramics for ULTCC Applications