Environmentally green approach to synthesize azo dyes based on 1-naphthol using nano BF<sub>3</sub>·SiO<sub>2</sub>under solvent-free conditions

Bamoniri, Abdolhamid; Mirjalili, Bi Bi Fatemeh; Moshtael-Arani, Naimeh

doi:10.1080/17518253.2014.969786

Cited by 21 publications

(4 citation statements)

References 45 publications

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“…TiO 2 is one of the most popular and widely studied semiconducting photocatalytic materials for reduction of nitroarenes. ,,− In the pioneering and early studies by Mahdavi et al and by Ferry and Glaze, a wide range of nitro-functionalized aliphatic and aromatic nitro compounds were photoreduced over commercial TiO 2 . − The photoreduction mechanism and the importance of hole scavengers were realized in the early investigations. Nitroarenes reduction is a stepwise multi-electron–proton reduction, as can be seen in Figure .…”

Section: Photocatalytic Reduction Of Nitroarenesmentioning

confidence: 99%

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Roy

2020

J. Phys. Chem. C

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This Mini-Review Article is a critical compendium of recent advances in the photocatalytic reduction of the priority pollutants nitroarenes and aqueous nitrate over various semiconducting materials. The photocatalytic reduction of nitroarenes produces useful industrial intermediate compounds, whereas the photocatalytic reduction of aqueous nitrates leads to the formation of harmless N 2 or NH 3 as a potential alternative to the Haber−Bosch process. This Mini-Review Article looks at the physical chemistry aspects of the photocatalytic materials as well as their respective optical band structure, surface morphology, size, crystalline structure, and polymorphic phases. The photocatalysts are categorized into five major segments: (a) band-engineered semiconducting photocatalysts, (b) quantum dots, (c) anionic and transition-metal-doped photocatalysts for optimum mid-gap states, (d) organic dyes or plasmonic metal-supported photocatalysts, and (e) photocatalysts with heterojunctions. Pristine and doped band-engineered TiO 2 stands out as the most explored class of materials for photoreduction of nitroarenes and nitrates. Other semiconductor oxides, like perovskites, layered graphitic-C 3 N 4 , graphene derivatives, and chalcogenides, are also discussed in this Mini-Review Article. The mechanistic details of the photocatalytic reduction of nitroaromatics and aqueous nitrates in correlation with the materials' physical properties are critically explored, with an overall conclusion at the end.

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Section: Photocatalytic Reduction Of Nitroarenesmentioning

confidence: 99%

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Roy

2020

J. Phys. Chem. C

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“…As a result, the development of a methodology for conversion to harmless nitroamines has become a top priority and an essential focus for environmental protection [29]. However, the catalytic reduction of nitroaromatics is considered an essential chemical reaction in the fabrication of many compounds, including dyes, the pharmaceutical industry, and the production of pesticides [30][31][32][33]. Although many studies have been reported extending more environmentally friendly methods for the selective reduction of nitro compounds to their amino analogues [34, 35], Most of these methods have some limitations.…”

Section: Introductionmentioning

confidence: 99%

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

Abdel‐Rahman

Mohammed

Ahmed

et al. 2023

Sohag Journal of Sciences

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The conversion of nitro compounds to their corresponding amino compounds by reduction route is a significant chemical reaction from an industrial and environmental standpoint. In the present paper, copper Schiff base complex was successfully prepared from the reaction between (1, 1 -(pyridine-2,3-dimethyl imino methyl)naphthalene-2,2 -diol) and Cu(CH3COO)2 salt. This was successfully characterized with different techniques and grafted over graphene oxide (GO) as support after functionalizing it via chemical grafting using aminopropyltriethoxysilane (APTES) as a linker to obtain the functionalized form (FGO). The new heterogeneous complex (CuMGO) was depicted using physicochemical and spectroscopic tools such as FT-IR, UV-Vis, SEM, XRD, Raman spectroscopy, and XPS. The results manifest that Cu(II) imine complex was successfully immobilized on GO. The resulting catalyst was used to reduce 4-nitrophenol (4-NP) to its corresponding amine 4-aminophenol (4-AP) at room temperature in case of using hydrazine hydrate as a reducing agent. It showed good activity with a percent of conversion (44.4%) and an apparent rate constant of 2.06 × 10-3 min-1 in about 130 min. The prepared catalyst can be recycled five times without losing its activity.

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“…Here, we pay attention to 1-naphthols, one of the common groups of organic compounds used in the production of dyes [5,11,18,25,30,34,36,49,54] (including the green chemistry approach [6]), which have not been taken into account with regard to becoming the components of composite materials yet.…”

Section: Introductionmentioning

confidence: 99%

1-Naphthols as components for multifunctional material systems (MFMS): the molecular modeling approach

Radkowska

Brągiel

2020

Struct Chem

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Increasing research interests have been paid to developing efficient multifunctional material systems (MFMS) by using various composite materials, owing to their useful properties and good stability. Here, we systematically studied 1-naphthols, especially how the type and position of a substituent influence the reactivity and properties, using different electron-directing groups. During computations, important preparation guidelines for thiol derivatives of 1-naphthol were obtained. It is very interesting to note that some molecules could exhibit intramolecular O–H–O interactions. Careful theoretical investigation reveals that all the tested compounds are stable and the molecules with substituents in positions 4 and 8 are the least reactive. It is also worth noting that for the stability and polarizability tensor values, it is more favorable when both substituents are in the same benzene ring. Among tested 1-naphthols, the greatest values of alpha, beta, and gamma are more than 5, 60, and 110 times better respectively, than in the urea molecule; the change of electron-withdrawing group (EWG) to electron-donating group (EDG) increases NLO effects. This study provided a new scope of 1-naphthols applicability by using them as anti-corrosion materials and as very good materials for NLO devices due to the high stability of the aromatic structure coupled with polarity given by the substituents. Also, the understanding of IR vibrations for more complex organic compounds with thiol substituent has been improved.

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Environmentally green approach to synthesize azo dyes based on 1-naphthol using nano BF₃·SiO₂under solvent-free conditions

Cited by 21 publications

References 45 publications

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

1-Naphthols as components for multifunctional material systems (MFMS): the molecular modeling approach

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Environmentally green approach to synthesize azo dyes based on 1-naphthol using nano BF3·SiO2under solvent-free conditions

Cited by 21 publications

References 45 publications

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Photocatalytic Materials for Reduction of Nitroarenes and Nitrates

Studying the Characteristics and Performance of a New Heterogeneous Catalyst Pre-templated Using Cu(II) Schiff Base Complex on reducing 4-nitrophenol.

1-Naphthols as components for multifunctional material systems (MFMS): the molecular modeling approach

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Environmentally green approach to synthesize azo dyes based on 1-naphthol using nano BF₃·SiO₂under solvent-free conditions