Studying the Mechanisms of Nitro Compounds Reduction (A-Review)

Sassykova, L.R.; Aubakirov, Y.A.; Sendilvelan, S.; Ташмухамбетова, Ж. Х.; Zhakirova, N.K.; Файзуллаева, М. Ф.; Batyrbayeva, A.А.; Ryskaliyeva, R. G.; Tyussyupova, Bakyt; Abildin, T. S.

doi:10.13005/ojc/350103

Cited by 21 publications

(15 citation statements)

References 21 publications

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“…In addition, it can be observed that the presence of electron-donating group (-NH 2 ) led to decrease of the yield of the reaction due to the stabilization of resonance effects to the nitro functionality 54 . According to the literature, in the case of halogen substituted reagent, dehalogenation may be responsible for low yield 55 . www.nature.com/scientificreports www.nature.com/scientificreports/ In the following, the effects of carbonization of MT, Glu shell and Hal etching on the catalytic activity were studied.…”

Section: Results and Discussion Catalyst Characterization The Xrd Patmentioning

confidence: 99%

Preparation of palladated porous nitrogen-doped carbon using halloysite as porogen: disclosing its utility as a hydrogenation catalyst

Sadjadi

Malmir

Lazzara

et al. 2020

Sci Rep

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in this article, halloysite nanoclay (Hal) was used as porogen for the synthesis of nitrogen doped porous carbon material with high specific surface area and pore volume. To this purpose, polymerization of melamine and terephthalaldehyde (Mt) was performed in the presence of amine-functionalized carbon coated Hal (Hal@Glu-2N) that was prepared from hydrothermal treatment of Hal and glucose. Then, the prepared nanocomposite was palladated and carbonized to afford Pd@Hal@C. To further improve the textural properties of the nanocomposite, and introduce more pores in its structure, Hal nanotubes were etched. the characterization of the resulting compound, pd@c, and comparing it with pd@ Hal@C, showed that etching of Hal significantly increased the specific surface area and pore volume in pd@c. pd@c was successfully used as a heterogeneous catalyst for promoting hydrogenation of nitroarens in aqueous media using hydrogen with atmospheric pressure as a reducing agent. the comparison of the structural features and catalytic activity of the catalyst with some control catalysts, including, Pd@Hal, Pd@Hal@Glu, Pd@Hal@Glu-MT and Pd@Hal@C confirmed that nitrogen groups in c could improve the pd anchoring and suppress its leaching, while etching of Hal and introduction of more pores could enhance the catalytic activity through facilitating the mass transfer. Carbon materials are among the most used compounds for diverse range of applications such as electrode materials, energy storage, catalysis and water treatment 1-5. The function of carbon materials is strongly dependent on their physical and chemical properties such as specific surface area, porosity and the presence of heteroatoms in the carbon structure. According to the literature, doping of heteroatoms such as nitrogen atoms in the carbon structure can improve the electric and chemical properties of carbon materials and expand their applications 2,3,6-10. To achieve nitrogen doped carbon, carbonization of heteroatom-containing substrates has been suggested. However, the control of the textural properties of the carbon material through simple carbonization is challenging. To furnish a solution to this issue, use of template and structural guides such as KIT and mesoporous silica has been suggested 11,12. However, most of the templates are synthetic and use of them is costly and lingers the synthetic process of carbon materials 13. Halloysite is a natural clay mineral (imperial formula of Al 2 Si 2 O 5 (OH) 4 •nH 2 O) with tubular morphology and chemistry similar to Kaolin 14-23. This nanoclay has been successfully applied for various applications such as material chemistry, catalysis and smart delivery 18,24-26. It should be noted that the specific geological origin of Hal affects the morphological features and size polydispersity of nanotubes 27. Moreover, the chemistry of the surface of Hal is readily tuned-able and can be modified through surface functionalization 15,16,27. Reduction of nitro group to amine functionality is an industrially attractive chemical transf...

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Section: Results and Discussion Catalyst Characterization The Xrd Patmentioning

confidence: 99%

Preparation of palladated porous nitrogen-doped carbon using halloysite as porogen: disclosing its utility as a hydrogenation catalyst

Sadjadi

Malmir

Lazzara

et al. 2020

Sci Rep

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“…DAS can be used to produce phosphorescent whiteners for fibers and paper. Catalysts based on supported palladium catalysts with the addition of platinum and rhodium showed high selectivity during hydrogenation during the reduction of both nitro groups and the aromatic ring in nitrobenzene using isopropanol and ethanol as solvents [2,3,8]. The role of palladium in catalytic reactions is largely determined by the different structure of active sites on its surface.…”

Section: -5286mentioning

confidence: 99%

“…Despite the high cost, the catalysts based on platinum group metals are widely used in the hydrogenation of organic compounds, in particular, for the production of aromatic amines from the corresponding nitro compounds. A special role in this is played by the catalysts of the platinum group deposited on various carriers [8,14]. The reduction of 3,4-dichloronitrobenzene in the presence of iridium and platinum catalysts was studied and it was established that the limiting stage of the process is the step of converting the corresponding arylhydroxylamine into an amino compound.…”

Section: -5286mentioning

confidence: 99%

Effective Catalysts for the Selective Restoration of Aromatic Mono- And Dinitro Compounds

Sassykova¹,

Maximov²,

Yerzhanov,³

et al. 2020

THE ACADEMY OF SCIENCES OF THE REPUBLIC OF KAZAKHSTAN JSC «D.V.

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“…However, materials with such a damaged graphene backbone are poor conductors and subjected to rapid degeneration. In the same time, the rich chemistry of nitro compounds (especially a large number of possible reduced forms) [22] encourage great potential in the RedOx applications of graphene with covalently bonded nitro groups.…”

Section: Introductionmentioning

confidence: 99%

On the stability and existence of nitro-graphene, nitro-graphane, and nitro-graphene oxide

Yamaletdinov¹

2020

Preprint

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Here, the possibility of the existence of nitro-graphene derivatives with undisturbed graphene backbone is considered. Based on the first-principles calculation, it is shown that while NO2 is unable to form a covalent bond with bare graphene, it becomes possible in some structures of graphane, fluorographene, and graphene oxide. This paper presents, among others, an analysis of the surrounding influence on the C-NO2 bond strength. The author believes, that potential prospects of these materials and discussion about possible synthesizing routes may help further research on graphene-based materials.

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Studying the Mechanisms of Nitro Compounds Reduction (A-Review)

Cited by 21 publications

References 21 publications

Preparation of palladated porous nitrogen-doped carbon using halloysite as porogen: disclosing its utility as a hydrogenation catalyst

Preparation of palladated porous nitrogen-doped carbon using halloysite as porogen: disclosing its utility as a hydrogenation catalyst

Effective Catalysts for the Selective Restoration of Aromatic Mono- And Dinitro Compounds

On the stability and existence of nitro-graphene, nitro-graphane, and nitro-graphene oxide

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