Organic-inorganic nano-hybrid decorated by copper (II) incarceration: A versatile catalytic assembly for the swift reduction of aromatic nitro and dye compounds

Singh, Gurjaspreet; Rani, Sapna; Arora, Aanchal; Sanchita, .; Duggal, Heena; Mehta, D.

doi:10.1016/j.mcat.2017.01.026

Cited by 20 publications

(8 citation statements)

References 72 publications

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“…Depending upon the sequence of steps involved in condensation, there are two different synthetic approaches . The first one is the loading of the organic group onto the pore walls of the mesoporous silica in a stepwise grafting via successive modifications of the silica nanoparticles (Scheme Sc1, supporting information).…”

Section: Resultssupporting

confidence: 54%

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

Singh

Rani

2017

Applied Organom Chemis

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The present work articulates the synthesis of a new series of organo‐functionalized triethoxysilanes derived from versatile carboxylic acids and 3‐azidopropyltriethoxysilane in excellent yields. A proficient and convenient route implicating the Cu(I)‐catalysed 1,3‐cycloaddition of organic azide with terminal alkynes, labelled as click silylation, has been developed for the generation of ester‐triazole‐linked alkoxysilanyl scaffolds (4a–f). All the synthesized compounds have been thoroughly characterized using elemental analysis and Fourier transform infrared, 1H NMR and 13C NMR spectroscopic techniques. Importantly, the fabricated alkoxysilanes are potentially amenable for an in situ sol–gel condensation reaction with silica nanospheres leading to the incorporation of organic functionality via covalent grafting onto the nanostructured particle system. As a proof of concept, a one‐pot preparation of organic–inorganic hybrid nanoparticles is presented using bis‐silane 4 f. The efficiency and selectivity of the prepared nanocomposite towards metal ions is highlighted using adsorption experiments, and the immobilized nanoparticles present a high sensing efficiency towards Cu2+ and Pb2+ ions while demonstrating better response than that of the bulk material.

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Section: Resultssupporting

confidence: 54%

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

Singh

Rani

2017

Applied Organom Chemis

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“…These results implied that the grafting of dialkylimidazolium‐based ionic liquids onto the silica surface was successful. Coordination of the metal to the tethered acac ligand induced a slight shift of the C=O stretching vibration (Figure b–d) …”

Section: Resultsmentioning

confidence: 99%

“…Coordinationo ft he metal to the teth-ered acac ligand induced as light shift of the C=Os tretching vibration (Figure 2b-d). [24] X-ray photoelectrons pectroscopy was used to characterize the states of the essential elements on the surface of the silicabased catalysts. As urvey spectrum of HMSÀacacÀILÀCu I is shown in Figure 3; the inset shows the N1sr egion.…”

Section: Resultsmentioning

confidence: 99%

Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker

Lai

Mei

2018

Chemistry An Asian Journal

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The use of solid catalysts to promote organic reactions in water faces the inherent difficulty of the poor mass-transfer efficiency of organic substances in water, which is often responsible for insufficient reaction and low yields. To solve this problem, the solid surface can be manipulated to become amphiphilic. However, the introduction of surfactant-like moieties onto the surface of silica-based materials is not easy. By using an accessible dihydropyran derivative as a grafting linker, a surfactant-combined bifunctional silica-based solid catalyst that possessed an ionic liquid tail and a metal acetylacetonate moiety was prepared through a mild Lewis-acid-catalyzed ring-opening reaction with a thiol-functionalized silica. The surfactant-combined silica-supported metal acetylacetone catalysts displayed excellent catalytic activity in water for a range of reactions. The solid catalyst was also shown to be recyclable, and was reused several times without significant loss in activity.

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“…Pyridine structures are important heterocyclic compounds found in many natural products, agrichemicals, pharmaceuticals and functional materials . Among the various derivatives, 2‐amino‐3‐cyanopyridine derivatives possess multiple activities such as anti‐pyretic, anti‐tumour, antimicrobial, anti‐inflammatory, antibacterial, anticonvulsant, fungicidal, cannabinoid receptor agonist, 1 KK‐b inhibitory, analgesic, HIV‐1 integrase and anti‐excitotoxic activities and are intermediates for the production of an extensive variety of important heterocycles.…”

Section: Introductionmentioning

confidence: 99%

“…A number of techniques such as physical (adsorption, ultrafiltration, coagulation and ion exchange) and biological (bacteria and yeasts) have been reported in the literature for the removal of coloured effluents coming out with industrial and textile waste. The reported techniques do not convert the contaminants into less harmful and useful products . Moreover, they do not cause complete degradation and also are not capable of discontinuing their movement from one phase to another.…”

Section: Introductionmentioning

confidence: 99%

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

Singh

Rajput

Govil

et al. 2018

Applied Organom Chemis

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The effect of varied zirconium content on the structural, morphological, magnetic, optical, thermal and catalytic properties of nanoparticles of the ferrite Cu1 − xZrxFe2O4 (x = 0, 0.5, 1) was investigated. The mixed ferrite was synthesized by the auto‐combustion method using nitrates of respective metals and citric acid as a chelating agent. The as‐prepared nanoparticles showed dual benefits. They were employed as a heterogeneous catalyst for one‐pot synthesis of polysubstituted pyridine derivatives as well as for catalytic degradation of industrial waste dyes such as methylene blue (MB). The highlight of the research reported is the catalytic degradation of industrial waste (MB) with high efficiency in eluent of a wide range of pH (3–13). The proposed nanoparticles arguably offer certain great advantages that include: low cost, facile nature, anti‐leaching property, magnetic recoverability and recyclability. The characterization of the as‐synthesized nanoparticles was done using various techniques. The leaching study was carried out using inductively coupled plasma optical emission spectroscopy. The formation of organic products was confirmed using Fourier transform infrared and 1H NMR spectroscopies and examination of degradation products of MB dye was carried out using mass spectrometry and UV–visible spectroscopy.

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Organic-inorganic nano-hybrid decorated by copper (II) incarceration: A versatile catalytic assembly for the swift reduction of aromatic nitro and dye compounds

Cited by 20 publications

References 72 publications

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker

Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

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Organic-inorganic nano-hybrid decorated by copper (II) incarceration: A versatile catalytic assembly for the swift reduction of aromatic nitro and dye compounds

Cited by 20 publications

References 72 publications

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

An expedient ‘click’ approach for the synthetic evaluation of ester‐triazole‐tethered organosilica conjugates

Bifunctional Solid Catalyst for Organic Reactions in Water: Simultaneous Anchoring of Acetylacetone Ligands and Amphiphilic Ionic Liquid “Tags” by Using a Dihydropyran Linker

Dual functional novel catalytic Cu1−xZrxFe2O4 (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue

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Product

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Dual functional novel catalytic Cu_1−xZr_xFe₂O₄ (x=0, 0.5, 1) nanoparticles for synthesis of polysubstituted pyridines and sunlight‐driven degradation of methylene blue