Bulk iron pyrite as a catalyst for the selective hydrogenation of nitroarenes

Morse, James R.; Callejas, Juan F.; Darling, Albert J.; Schaak, Raymond E.

doi:10.1039/c7cc00120g

Cited by 39 publications

(30 citation statements)

References 31 publications

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“…[3] Huang and co-workers described selective platinum nanocatalyst for hydrogenation of nitroaromatics to anilines at room temperature. [7] Au−Cu alloy showed visible-lightinduced photocatalytic activity for the reduction of nitroaromatics to anilines. [5] Furthermore, CeO 2 nanorod-based catalysts have also been reported for hydrogenation of nitroaromatics with N 2 H 4 as a reducing agent.…”

Section: Introductionmentioning

confidence: 99%

Hydrogenation of nitroaromatics to anilines catalyzed by air‐stable arene ruthenium (II)–NNN pincer complexes

Pitchaimani

Gunasekaran

Anthony

et al. 2019

Applied Organom Chemis

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A series of air‐stable, phosphine‐free arene ruthenium (II)–NNN pincer complexes (RuL, RuL1, RuL2 and RuL3) have been synthesized and characterized by spectroscopic and single‐crystal X‐ray analysis. Further, arene ruthenium (II)–NNN pincer complexes have been used as catalyst for hydrogenation of nitroaromatics into aniline in the presence of NaBH4 at room temperature. The catalytic process suggested highly chemo‐selective nitroreduction with wide functional group tolerance.

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Section: Introductionmentioning

confidence: 99%

Hydrogenation of nitroaromatics to anilines catalyzed by air‐stable arene ruthenium (II)–NNN pincer complexes

Pitchaimani

Gunasekaran

Anthony

et al. 2019

Applied Organom Chemis

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“…Pyrite has wide area of applications (Figure ) such as energy storage and conversion field: photovoltaics,, photocatalytic hydrogen production, batteries, supercapacitors, photocapacitors, thermoelectricity;, electronics,, optoelectronics, spintronics; environmental applications; hydrogenation; sensors; agriculture, and emerging biomedical field …”

Section: Introductionmentioning

confidence: 99%

Nanocrystalline Pyrite for Photovoltaic Applications

et al. 2018

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Transition metal sulfides (TMSs) are of special interest in energy conversion and storage devices. Amongst all sulfides, fool's gold or iron pyrite (FeS 2 ) is potentially an attractive candidate for photovoltaic applications. Iron pyrite has risen to prominence due to its distinct properties and abundance in nature to meet the large scale needs. It is considered as environmentally benign solar absorber material with high absorption coefficient, α > 6 x10 5 cm À 1 for λ � 700 nm and suitable energy bandgap (E g = 0.95 eV). Numerous physical and chemical methods have been employed to deposit nanocrystalline pyrite thin films directly from source materials or indirectly by sulfuration. This review gives an overview of pyrite as a low cost photovoltaic absorber material for contemporary solar cell structures. In addition, practical approaches like the rational design of nanocomposites, band gap engineering and nanostructure synthesis of pyrite for improving its properties particularly photovoltaic properties are also deliberated. Moreover, limitations, challenges, remedies and prospects of pyrite as potential photovoltaic material are also reviewed to further advance the development of pyrite-based solar cell configurations.[a] Dr.at a low precursor concentration, pyrite nanocubes (125-250 nm in 20-180 min) were obtained due to low nuclei concentration and slow growth (diffusion limited) in quasiequilibrium. The anisotropic structures nanodendrites were 2 3 4 5 6 7 8

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“…The sustainable reduction of aromatic nitro compounds represents one of the most straightforward, industrially applicable approaches to synthesize anilines. [1] Although remarkable progress has been made in the direct hydrogenation of nitroarenes using pressurized H 2 as a hydrogen source with non-noble metal catalysts, [2][3][4][5][6][7][8] the transfer hydrogenation could realize safe reductions under mild conditions without specialized reaction setups. Therefore, NaBH 4 , [9] HCOONH 4 , [10] HCOOH, [11] hydrazine hydrate, [12] silane, [13] and H 3 PO 3 [14] have emerged as alternative hydrogen storage materials for reduction of nitro compounds.…”

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confidence: 99%

Commercially Available CuO Catalyzed Hydrogenation of Nitroarenes Using Ammonia Borane as a Hydrogen Source

Chen

Xia

et al. 2020

ChemCatChem

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Tandem ammonia borane dehydrogenation and nitroarenes hydrogenation has been reported as a novel strategy for the preparation of aromatic amines. However, the practical application of this strategy is subjected to the high-cost and tedious preparation of supported noble metal nanocatalysts. The commercially available CuO powder is herein demonstrated to be a robust catalyst for hydrogenation of nitroarenes using ammonia borane as a hydrogen source under mild conditions. Numerous amines (even sterically hindered, halogenated, and diamines) could be obtained through this method. This monometallic catalyst is characteristic of support-free, excellent chemoselectivity, low-cost, and high recyclability, which will favor its future utilization in preparative reduction chemistry. Mechanistic studies are also carried out to clarify that diazene and azoxybenzene are key intermediates of this heterogeneous reduction.Aromatic amines serve as key intermediates for the production of a wide range of high value-added materials, including dyes, pharmaceuticals, polymers, agrochemicals, etc. The increasing demand for functionalized amines has continuously driven the development of green and economical synthetic methods for their scalable production. The sustainable reduction of aromatic nitro compounds represents one of the most straightforward, industrially applicable approaches to synthesize anilines. [1] Although remarkable progress has been made in the direct hydrogenation of nitroarenes using pressurized H 2 as a hydrogen source with non-noble metal catalysts, [2][3][4][5][6][7][8] the transfer hydrogenation could realize safe reductions under mild conditions without specialized reaction setups. Therefore, NaBH 4 , [9] HCOONH 4 , [10] HCOOH, [11] hydrazine hydrate, [12] silane, [13] and H 3 PO 3 [14] have emerged as alternative hydrogen storage materials for reduction of nitro compounds.Unlike the above hydrogen sources, ammonia borane (BH 3 · NH 3 , denoted as AB hereafter) has been generally considered as a practical reservoir for hydrogen storage and transport, due to its high hydrogen capacity (19.6 wt %), stability (solid at room temperature), safety, and nontoxicity. [15] Additionally, bulk quantities of AB are commercially available and affordable. Hydrogen evolution from AB can be expediently performed via hydrolysis in the presence of transition metals (BH 3 · NH 3 + 2H 2 O!NH 4 + + BO 2 À + 3H 2 "), and one-pot tandem AB dehydrogenation and unsaturated compound hydrogenation provides a viable strategy for the manufacture of valuable molecules. As a metal-free reductant, AB has been directly used to initiate the reduction of imines, [16] ketones, [17] aldehydes, [17] and even polarized olefins. [18] Although the reducing ability of AB is not strong enough on its own to initiate the direct hydrogenation of other unsaturated functional groups, the use of metal catalysts with this reagent resolves this challenge. There are numerous reports describing the use of AB as the hydrogen donor for the catalytic transfer hydrog...

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Bulk iron pyrite as a catalyst for the selective hydrogenation of nitroarenes

Abstract: Bulk iron pyrite (FeS) functions as an inexpensive, Earth-abundant, off-the-shelf catalyst capable of selectively hydrogenating a broad scope of substituted nitroarenes to their corresponding aniline derivatives using molecular hydrogen.

Cited by 39 publications

References 31 publications

Hydrogenation of nitroaromatics to anilines catalyzed by air‐stable arene ruthenium (II)–NNN pincer complexes

Hydrogenation of nitroaromatics to anilines catalyzed by air‐stable arene ruthenium (II)–NNN pincer complexes

Nanocrystalline Pyrite for Photovoltaic Applications

Commercially Available CuO Catalyzed Hydrogenation of Nitroarenes Using Ammonia Borane as a Hydrogen Source

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