Yeast supported gold nanoparticles: an efficient catalyst for the synthesis of commercially important aryl amines

Krishnan, Saravanan; Patel, Paresh N.; Balasubramanian, K. K.; Chadha, Anju

doi:10.1039/d0nj04542j

Cited by 21 publications

(11 citation statements)

References 88 publications

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“…Interestingly, a halo region was found at the diffraction peak range of 15°–35°, which may have been due to the complexation of ordered and disordered structures of the cellular polymeric molecules containing organic groups with Au 3+ ions, resulting in the spacing of individual polymeric chains [ 108 , 109 , 110 ]. A similar result was also reported in an earlier study [ 111 ], where yeast Candida parapsilosis ATCC 7330-supported gold nanoparticles exhibited a similar XRD pattern of an amorphous halo region. Furthermore, many minor unidentified peaks were reported, which may have been due to the surface association of biomolecules present in the bacterial extract with the biosynthesized LBOE-AuNPs [ 103 ].…”

Section: Resultssupporting

confidence: 90%

Green Chemistry Based Gold Nanoparticles Synthesis Using the Marine Bacterium Lysinibacillus odysseyi PBCW2 and Their Multitudinous Activities

et al. 2022

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Green chemistry has paved an ‘avant-garde avenue’ in the production and fabrication of eco-friendly stable nanoparticles employing the utilization of biological agents. In the present study we present the first report on the potential of the marine bacterium Lysinibacillus odysseyi PBCW2 for the extracellular production of gold nanoparticles (AuNPs). Utilizing a variety of methods, AuNPs in the cell-free supernatant of L. odysseyi (CFS-LBOE) were identified and their antioxidant, antibacterial, and dye-degrading properties were examined. The visual coloring of the reaction mixture to a ruby red hue showed the production of LBOE-AuNPs; validated by means of XRD, TEM, SEM, XRD, DLS, TGA, and FT-IR analysis. Additionally, the 2,2-diphenyl-1-picrylhydrazyl technique and the well diffusion assay were used to examine their dose-dependent antioxidant and antibacterial activity. These biogenic LBOE-AuNPs showed 91% dye degradation efficiency during catalytic reduction activity on BTB dye, demonstrating their versatility as options for heterogeneous catalysis.

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Section: Resultssupporting

confidence: 90%

Green Chemistry Based Gold Nanoparticles Synthesis Using the Marine Bacterium Lysinibacillus odysseyi PBCW2 and Their Multitudinous Activities

et al. 2022

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“…successfully synthesized gold nanorods stabilized on graphene oxide nanocomposites (AuNRs/GO) for nitrophenol hydrogenation and achieved excellent results [68] . Recently, a catalyst with gold nanoparticles supported on yeast, AuNP(CpGNP), was employed to reduced p‐NP using NaBH 4 as the hydride source to p‐AP in aqueous medium, which afforded >99% conversion [69] . In this work, a catalyst with AuNPs supported on a jute stick synthesized using a green synthetic route was used to reduce p‐NP to p‐AP with a very high reactivity (>99%) and almost quantitative selectivity (>99%) under very mild reaction conditions.…”

Section: Resultsmentioning

confidence: 99%

Biogenic Synthesis of Gold Nanoparticles on a Green Support as a Reusable Catalyst for the Hydrogenation of Nitroarene and Quinoline

Nafiu

Shah

Aziz

et al. 2021

Chemistry An Asian Journal

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Direct attachment of gold nanoparticles to a green support without the use of an external reducing agent and using it for removing toxic pollutants from wastewater, i. e., reduction of nitroarene to amine, are described. A novel approach involving the reduction of gold by the jute plant (Corchorus genus) stem-based (JPS) support itself to form nanoparticles (AuNPs) to be used as a catalytic system ('dipcatalyst') and its catalytic activity for the hydrogenation of series of nitroarenes in aqueous media are presented. AuNPs/ JPS catalyst was characterized using SEM, UV-Vis, FTIR, TEM, XPS, and ICP-OES. Confined area elemental mapping exhibits uniform and homogeneous distribution of AuNPs on the support surface. TEM shows multi-faceted AuNPs in the range of 20-30 nm. The reactivity of AuNPs/JPS for the transfer hydrogenation of nitroarene as well as hydrogenation of quinoline under molecular H 2 pressure was evaluated. Sodium borohydride, when used as the hydrogen source, demonstrates a high catalytic efficiency in the transfer hydrogenation reduction of 4-nitrophenol (4-NP). Quinoline is quantitatively and chemoselectively hydrogenated to 1,2,3,4tetrahydroquinoline (py-THQ) using molecular hydrogen. Reusability studies show that AuNPs are stable on the support surface and their selectivity is not affected.

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“…Despite entirely performing as methods, all the concerns regarding these methodologies must be remarked. Starting from metals, this procedure is usually run under an acidic environment [54][55][56][57][58], and consequently, it may not apply to specific substrates sensitive to such conditions.…”

Section: Scheme 1 a Comparison Between This Work And Previous Methodo...mentioning

confidence: 99%

“…Moreover, the use of metals is often associated with various risks concerning human health and the environment due to their well-established toxicity. For example, with molecular gaseous hydrogen, its use is related to an explosion hazard because of its high reactivity [54,55]. Furthermore, since this procedure is exergonic (ΔrG° < 0), a high amount of heat is typically released during an industrial process [56].…”

Section: Scheme 1 a Comparison Between This Work And Previous Methodo...mentioning

confidence: 99%

Mechanochemistry Frees the Thiourea Dioxide (TDO) from the ‘Veils’ of the Solvent, Exposing All Its Reactivity

Basoccu¹,

Cuccu²,

Caboni³

et al. 2023

Preprint

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The synthesis of nitrogen-based heterocycles has always been considered essential in the development of pharmaceuticals in medicine and agriculture. This explains why various synthetic approaches have been proposed in recent decades. However, performing as methods often imply harsh conditions or the employment of toxic solvents and dangerous reagents. Mechanochemistry is undoubtedly one of the most promising technologies currently used for reducing any possible environmental impact due to the worldwide interest in developing solvent-free synthetic pathways. Following this line, we propose a renewed mechanochemical protocol for synthesizing various heterocyclic classes by exploiting the reducing proprieties and the electrophilic nature of thiourea dioxide (TDO). Simultaneously using the ready availability and low cost of a component of the textile industry such as TDO and all the advantages brought by a green technique such as mechanochemistry, we plotted the route towards a more sustainable and eco-friendly methodology for obtaining heterocyclic moieties.

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Yeast supported gold nanoparticles: an efficient catalyst for the synthesis of commercially important aryl amines

Abstract: High yielding synthesis of industrially important aryl amines from nitroarenes using yeast supported gold nanoparticles as a sustainable catalyst.

Cited by 21 publications

References 88 publications

Green Chemistry Based Gold Nanoparticles Synthesis Using the Marine Bacterium Lysinibacillus odysseyi PBCW2 and Their Multitudinous Activities

Green Chemistry Based Gold Nanoparticles Synthesis Using the Marine Bacterium Lysinibacillus odysseyi PBCW2 and Their Multitudinous Activities

Biogenic Synthesis of Gold Nanoparticles on a Green Support as a Reusable Catalyst for the Hydrogenation of Nitroarene and Quinoline

Mechanochemistry Frees the Thiourea Dioxide (TDO) from the ‘Veils’ of the Solvent, Exposing All Its Reactivity

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