Oxidative desulfurization of diesel fuel catalyzed by polyoxometalate immobilized on phosphazene-functionalized silica

Craven, Michael D.; Xiao, Dong; Kunstmann‐Olsen, Casper; Kozhevnikova, Elena F.; Blanc, Frédéric; Steiner, Alexander; Kozhevnikov, Ivan V.

doi:10.1016/j.apcatb.2018.03.005

Cited by 155 publications

(70 citation statements)

References 35 publications

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“…As illustrated in Scheme S1, a possible catalytic reaction mechanism was proposed . The DBT and [PMo 12 O 40 ] 3− were taken as examples of the substrate and POM, respectively.…”

Section: Resultsmentioning

confidence: 93%

Highly stable polyoxometalate‐resorcin[4]arene‐based inorganic‐organic complexes for catalytic oxidation desulfurization

Yang

et al. 2019

Applied Organom Chemis

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Self‐assembly of a resorcin[4]arene‐based ligand (TMR4A) with metal salts and H3PMo12O40·xH2O offers two isostructural complexes, namely, [Ni2Cl(TMR4A)2(CH3CN)2]·[PMo12O40]·4CH3CN (1) and [Co2Cl(TMR4A)2(CH3CN)2]·[PMo12O40]·4CH3CN (2). In both 1 and 2, one Cl− anion bridges two metal cations, and each metal cation is further chelated by four 2‐mercaptopyridine N‐oxide groups of one TMR4A, producing a [M2Cl(TMR4A)2]3+ dimer (M = Ni or Co). The negative [PMo12O40]3− as a counter‐anion balances the positive charge. Markedly, 1 and 2 exhibit high stability in aqueous solutions with different pH values and in organic solvents. Remarkably, the efficient heterogeneous catalytic capability for oxidative desulfurization was studied by suing 1 and 2 as recycled catalysts. Moreover, the electrochemical behaviors of the two compounds were discussed as well.

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“…As illustrated in Scheme S1, a possible catalytic reaction mechanism was proposed . The DBT and [PMo 12 O 40 ] 3− were taken as examples of the substrate and POM, respectively.…”

Section: Resultsmentioning

confidence: 93%

Highly stable polyoxometalate‐resorcin[4]arene‐based inorganic‐organic complexes for catalytic oxidation desulfurization

Yang

et al. 2019

Applied Organom Chemis

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“…[4] However,t he vast majority of these phosphines are based on organic backbones and main group counterpartsb ased on inorganic backbones have received far less attention.Inthe past decade, phosphazanes, based on thermodynamically stable P-N singleb onds, have emerged as excellent candidates for the construction of ar ange of new Lewis base donor ligand systems. [5][6][7][8][9][10][11][12][13][14][15][16][17] In particular,c yclo-diphosph(III)azane ligandso ft he type [XP(m-NR)] 2 (X = RO, R 2 N, C CPh) (A, Figure 1) have been employed in the assembly of a broad range of MOF-like coordination networksa nd discrete macrocyclic arrangements, utilizing the Pd onor atoms of their P 2 N 2 ring units. [18,19] Neutral phosph have been employed in the assembly of ab road range (III)azanel igandso ft his type are also of interest in catalysis.F or example, late transition metalc omplexes of ansa-bridged dicyclophosphazanes B (Figure 1), in which chirality can be introduced at the diol bridgea nd/ora tt he amido Rg roup, have allowed the observationo fm atch and mismatche ffects in enantioselective catalysis, with good enantiomeric excesses being found for the gold-catalysed hydroamination of g-allenyl sulfonamides and the asymmetric nickel-catalysed three-componentc oupling of ad ienea nd an aldehyde.…”

Section: Introductionmentioning

confidence: 99%

“…However, the vast majority of these phosphines are based on organic backbones and main group counterparts based on inorganic backbones have received far less attention. In the past decade, phosphazanes, based on thermodynamically stable P‐N single bonds, have emerged as excellent candidates for the construction of a range of new Lewis base donor ligand systems [5–17] . In particular, cyclo‐diphosph(III)azane ligands of the type [XP(μ‐NR)] 2 (X=RO, R 2 N, C≡CPh) (A, Figure 1) have been employed in the assembly of a broad range of MOF‐like coordination networks and discrete macrocyclic arrangements, utilizing the P donor atoms of their P 2 N 2 ring units [18, 19] .…”

Section: Introductionmentioning

confidence: 99%

The Coordination Chemistry of the N‐Donor‐Substituted Phosphazanes

Plajer

Bond

Wright

2020

Chemistry A European J

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Phosph(III)azanes, featuring the heterocyclobutane P 2 N 2 ring, have now been established as building blocks in main-group coordination and supramolecular compounds. Previous studies have largely involved their use as neutral Pdonor ligands or as anionic N-donorl igands,d erived from deprotonationo fa mido-phosphazanes [RNHP(m-NR)] 2 .T he use of neutral amido-phosphazanes themselves as chelating, H-bonddonorsi na nion receptors has also been an area of recent interestb ecause of the ease by which the proton acidity and anion binding constantsc an be modulated, by the incorporation of electron-withdrawing exo-a nd endocyclic groups (R) and by the coordination of transition metals to the ring Pa toms. We observed recently that the effecto fP ,N-chelationo fm etal atomst ot he Pa toms of cis-[(2-py)NHP(m-N t Bu)] 2 (2-py = 2-pyridyl) not only pre-organises the NÀHf unctionality foro ptimum H-bondingt oa nions but also resultsi nalarge increase in anion binding constants, well above those for traditional organic receptorsl ike squaramides and ureas. Here, we report ab roader investigation of ligandc hemistry of [(2-py)NHP(m-t NBu)] 2 (and of the new quinolyld erivative[ (8-Qu)NHP(m-N t Bu)] 2 (8-Qu = 8-quinolyl). The additional N-donor functionality of the heterocyclics ubstituentsa nd itsp osition has am arked effect on the anion and metal coordination chemistry of both species, leading to novel structural behaviour and reactivity compared to unfunctionalizedc ounterparts.

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“…On the other hand, sulfur compounds are Benzothiophene (BT), Dibenzothiophene (DBT), 3‐methyl thiophen (3‐MT), Thiophen (T), 2‐methyl thiophene (2‐MT), 4,6‐dimethyl dibenzothiophene (4, 6‐DMDBT), Sulfone dibenzothiophene (DBTO), and 4‐methyl dibenzothiophene (4‐MDBT) . For removal, the most effective methods are oxidative denitrogenation (ODN) and oxidative desulfurization (ODS) by catalysts. Meanwhile, zeolite matrixes are a group of catalysts with a high selectivity and a desirable activity to break down the recently introduced C−N and C−S bonds .…”

Section: Introductionmentioning

confidence: 99%

Morphology‐Controlled Synthesis of CuO, CuO Rod/MWW Composite for Advanced Oxidation of Indole and Benzothiophene

et al. 2019

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Various morphologies of copper (II) oxide (CuO) such as dandelion, sea anemone, walnut, leaf, dendrite, rod, fiber, feather, and flake were synthesized and characterized by different methods. The oxidation of indole (IND) and benzothiophene (BT) in mild conditions was studied by various morphologies of CuO. Walnut with the lowest surface area 7.928 (m2g−1) and rod with a high surface area 41.237 (m2g−1) had efficiencies of 5.93% and 91.44% for IND and 0.53% and 88.29% for BT at 4 h, respectively. Zeolite MWW was synthesized by microwave and hydrothermal method on which CuO rod was loaded via wet impregnation method. The results indicated that CuO rod/MWW composite considerably outperformed CuO rod. The oxidations of IND and BT by CuO rod/MWW composite for 75 min was 99.99 and 97.67%, respectively. Based on the results across all experiments, the oxidation of the IND was higher than that of BT. CuO rod/MWW composite was shown to be an efficient catalyst for oxidation of nitrogen and sulfur heterocycles.

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Oxidative desulfurization of diesel fuel catalyzed by polyoxometalate immobilized on phosphazene-functionalized silica

Cited by 155 publications

References 35 publications

Highly stable polyoxometalate‐resorcin[4]arene‐based inorganic‐organic complexes for catalytic oxidation desulfurization

Highly stable polyoxometalate‐resorcin[4]arene‐based inorganic‐organic complexes for catalytic oxidation desulfurization

The Coordination Chemistry of the N‐Donor‐Substituted Phosphazanes

Morphology‐Controlled Synthesis of CuO, CuO Rod/MWW Composite for Advanced Oxidation of Indole and Benzothiophene

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