Thermal behavior of polyoxometalate Mo132

Ostroushko, A. A.; Tonkushina, M. O.; Сафронов, А. П.; Men’shikov, S. Yu.; Korotaev, Vladislav Yu.

doi:10.1134/s0036023609020028

Cited by 17 publications

(18 citation statements)

References 4 publications

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“…In [1][2][3][4][5][6][7][8], we studied physical and chemical proper ties of nanocluster polyoxometalates (POM) based on the structure of molybdenum of the keplerate type (buckyball, fullerene), including electrotransport, sorption, photochemical and thermal stability, and complexation. These compounds were first obtained by Prof. Müller in Germany [9,10].…”

Section: Introductionmentioning

confidence: 99%

Electrotransport, sorption, and photochemical properties of nanocluster polyoxomolybdates with a toroidal structure

Остроушко¹,

Korotayev²,

Tonkushina³

et al. 2012

Russ. J. Phys. Chem.

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The electrotransport, sorption, and photochemical properties of polyoxometalateO 416 H 6 (H 2 O) 58 (CH 3 CO 2 ) 6 ] · xH 2 O (x ~ 250) with a toroidal structure are studied. Con ditions for studying these characteristics are selected on the basis of data on the stability of POM, in depen dence on the concentration and acidity of the medium and the processes of thermal decomposition. A set of independent physical and chemical methods of analysis is used. The possibility of the complexation of toroi dal POM with polymer molecules is established. The photostabilizing effect of this POM on polymer mole cules is revealed.

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Section: Introductionmentioning

confidence: 99%

Electrotransport, sorption, and photochemical properties of nanocluster polyoxomolybdates with a toroidal structure

Остроушко¹,

Korotayev²,

Tonkushina³

et al. 2012

Russ. J. Phys. Chem.

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“…Then, molyb denum and iron oxides in the solid residue react with each other to give complex oxide products (endot herms at ~500 and ~520°С). However, as distinct from Мо 132 [6], the Mo 72 Fe 30 sample exposed to 130-150°С for 2 h had no the crystal structure motif typical of the buckyball and remained amorphous. We found that the UV Vis spectrum of Mo 72 Fe 30 dissolved in water showed a characteristic band at 325 nm, whereas the spectrum of an aqueous solution of the sample heated at 130-150°С lacked this peak.…”

Section: Resultsmentioning

confidence: 94%

“…This is evidence of the cleavage of the terminal Mo=O bonds (ν = 970 cm -1 ) and the col lapse of the crystal structure of the nanocluster. Thus, the solid Mo 72 Fe 30 POM is less thermally stable than Мо 132 [6].…”

Section: Resultsmentioning

confidence: 97%

“…For Мо 132 , the decomposition products contain organics, such as acetamide and acetonitrile [6], whereas mass spectrometry identified only water OSTROUSHKO et al and carbon dioxide as the products of destruction of Mo 72 Fe 30 . The first stage of water removal is observed up to ~190°С (the maximum in the thermoanalytical curve at ~130°С) and results in a 14.67% weight loss.…”

Section: Resultsmentioning

confidence: 98%

“…Of great importance is not only the stability of POMs in solutions but also their stability in the solid state in which they can exist in a crystalline form [3]. It is worth noting that, for the parent Мо 132 com pound, the behavior in solutions [4,5], the thermal stability and the mechanism of heat induced decom position [6,7], and the stability in polymer films exposed to UV irradiation [8] have been studied. Solid Мо 132 exhibits specific sorption properties to organic molecules [9].…”

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confidence: 99%

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Study of the stability of solid polyoxometalate Mo72Fe30 with a buckyball structure

Остроушко¹,

Tonkushina²,

Сафронов³

et al. 2012

Russ. J. Inorg. Chem.

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An organic‐inorganic heterogeneous catalyst based on Keplerate polyoxometalates for oxidation of dibenzothiophene derivatives with Hydrogen peroxide

Fareghi‐Alamdari

Zekri

Moghadam

et al. 2018

Applied Organom Chemis

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An organic-inorganic material (NH 4 ) 2 (MimAM) 40 [Mo 132 O 372 (CH 3 COO) 30 (H 2 O) 72 ] have been synthesized by reacting [(NH 4 ) 42 [Mo VI 72 Mo V 60 O 372 (CH 3 COO) 30 (H 2 O) 72 ] with the ionic liquid 3-Aminoethyl-1-methylimidazolium bromide. The catalyst showed remarkably a high catalytic performance in the oxidation of dibenzothiophene (DBT) derivatives with H 2 O 2 35% as a safe and green oxidant. The main parameters affecting the process including catalyst, acid additive, hydrogen peroxide amounts and temperature have been investigated in detail. Sulfur removal of DBT in n-heptane reached to 98.3% yield at 40°C using 2.5 mmol H 2 O 2 and 100 mg of (NH 4 ) 2 (MimAM) 40 [Mo 132 O 372 (CH 3 COO) 30 (H 2 O) 72 ] after 90 min. Underthe optimal conditions, BT (benzothiophene), DBT (dibenzothiophene) and 4,6-DMDBT (4,6-dimethyl-dibenzothiophene) achieved high desulfurization efficiency. Our results showed that the reactivity order of different model sulfur compounds are thiophene <4,6-dimethyl dibenzothiophene< dibenzothiophene. The catalysts could be easily separated from the reaction solution by simple filtration and recycled for several times without loss of activity.

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Thermal behavior of polyoxometalate Mo132

Cited by 17 publications

References 4 publications

Electrotransport, sorption, and photochemical properties of nanocluster polyoxomolybdates with a toroidal structure

Electrotransport, sorption, and photochemical properties of nanocluster polyoxomolybdates with a toroidal structure

Study of the stability of solid polyoxometalate Mo72Fe30 with a buckyball structure

An organic‐inorganic heterogeneous catalyst based on Keplerate polyoxometalates for oxidation of dibenzothiophene derivatives with Hydrogen peroxide

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