Nickel ferrite nanoparticles–hydrogen peroxide: a green catalyst-oxidant combination in chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides

Kulkarni, Aparna; Desai, Uday V.; Pandit, Kapil S.; Kulkarni, Makarand A.; Wadgaonkar, Prakash P.

doi:10.1039/c4ra04095c

Cited by 51 publications

(23 citation statements)

References 35 publications

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“…On the other hand, NiFe 2 O 4 NPs have been utilized in selective oxidation of thiols to produce disulfides (in presence of hydrogen peroxide), 11 cyanation of aryl and heteroaryl halides, 12 reduction of 4-nitrophenol (4-NP) in presence of NaBH 4 , 13 and gas sensing. 14−16 Most of these applications of NiFe 2 O 4 NPs are driven by their surface properties, such as presence of (i) metal hydroxides, (ii) remanant organic ligand, and (iii) adsorbed small organic molecules at their surfaces.…”

Section: Introductionmentioning

confidence: 99%

Structural, Magnetic, and Catalytic Evaluation of Spinel Co, Ni, and Co–Ni Ferrite Nanoparticles Fabricated by Low-Temperature Solution Combustion Process

2018

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Here, we present the low-temperature (∼600 °C) solution combustion method for the fabrication of CoFe 2 O 4 , NiFe 2 O 4 , and Co 0.5 Ni 0.5 Fe 2 O 4 nanoparticles (NPs) of 12–64 nm range in pure cubic spinel structure, by adjusting the oxidant (nitrate ions)/reductant (glycine) ratio in the reaction mixture. Although nitrate ions/glycine (N/G) ratios of 3 and 6 were used for the synthesis, phase-pure NPs could be obtained only for the N/G ratio of 6. For the N/G ratio 3, certain amount of Ni 2+ cations was reduced to metallic nickel. The NH 3 gas generated during the thermal decomposition of the amino acid (glycine, H 2 NCH 2 COOH) induced the reduction reaction. X-ray diffraction (XRD), Raman spectroscopy, vibrating sample magnetometry, and X-ray photoelectron spectroscopy techniques were utilized to characterize the synthesized materials. XRD analyses of the samples indicate that the Co 0.5 Ni 0.5 Fe 2 O 4 NPs have lattice parameter larger than that of NiFe 2 O 4 , but smaller than that of CoFe 2 O 4 NPs. Although the saturation magnetization ( M s ) of Co 0.5 Ni 0.5 Fe 2 O 4 NPs lies in between the saturation magnetization values of CoFe 2 O 4 and NiFe 2 O 4 NPs, high coercivity ( H c , 875 Oe) of the NPs indicate their hard ferromagnetic behavior. Catalytic behavior of the fabricated spinel NPs revealed that the samples containing metallic Ni are active catalysts for the degradation of 4-nitrophenol in aqueous medium.

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Section: Introductionmentioning

confidence: 99%

Structural, Magnetic, and Catalytic Evaluation of Spinel Co, Ni, and Co–Ni Ferrite Nanoparticles Fabricated by Low-Temperature Solution Combustion Process

2018

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“…[22][23][24][25][26][27][28][29] Recently, the nanosized ferrites have emerged as easily recyclable and recoverable catalysts for various organic reactions by discarding the hazardous process of separation and recycling of catalyst using conventional methods. [22][23][24][25][26][27][28][29] Recently, the nanosized ferrites have emerged as easily recyclable and recoverable catalysts for various organic reactions by discarding the hazardous process of separation and recycling of catalyst using conventional methods.…”

Section: Introductionmentioning

confidence: 99%

Stable room temperature magnetic ordering and excellent catalytic activity of mechanically activated high surface area nanosized Ni_0.45Zn_0.55Fe₂O₄

et al. 2015

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Herein we report the structural, microstructural, dc magnetic and hyperfine properties along with catalytic activity of mechanosynthesized nanosized Ni 0.45 Zn 0.55 Fe 2 O 4 ($12 nm). The Rietveld refinement of the powder X-ray diffraction data, high resolution transmission electron microscopy and the infield Mössbauer study suggest that the sample is nanosized pure single phase cubic spinel of Fd 3m symmetry with good crystallinity and it possesses equilibrium cation distribution ((Fe 3+ 0.45 Zn 2+ 0.55 ) A [Fe 3+ 1.55 Ni 2+ 0.45 ] B O 4 ). The sample exhibits ferrimagnetic ordering with high saturation magnetization (M SAT ¼ 53, 72 and 76 emu g À1 at 300, 100 and 10 K, respectively), coercivity (H C ¼ 280, 1200 and 2800 Oe at 300, 100 and 10 K, respectively), collective magnetic excitations, spin canting and memory effect in dc magnetization. The infield Mössbauer study suggests that the interior region of the particles is perfectly ferrimagnetic in nature, while the spins at the surface region are ferrimagnetically coupled but noncollinearly aligned. Despite its nanometric size, the sample does not show superparamagnetic behavior but rather retains stable magnetic order at room temperature due to enhancement of stress and surface anisotropy energy caused by high energy ball milling. We have shown that the presence of collective magnetic state along with surface spin disorder are the underlying reason for having slow dynamics and memory effect in the sample. Further, the BET (Brunauer-Emmett-Teller) surface area and the pore volume of the sample are 233 m 2 g À1 and 0.475 cm 3 g À1 , respectively. The temperature programmed desorption (TPD) of ammonia suggests that the surface of this porous material is highly acidic (1.516 mmol g À1 ). Because of its high surface acidity and BET surface area the material acts as an efficient heterogeneous catalyst in the one pot synthesis of 3,4dihydropyrimidine-2(1H)-ones (DHPMs) by Biginelli condensation reaction. This sample can be used in magnetic data storage devices, coding, storing and retrieving of binary numbers through magnetic field change and also as a very efficient heterogeneous, magnetically separable and recyclable catalyst.

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“…Fe 3 O 4 , NiFe 2 O 4 , CoFe 2 O 4 and CuFe 2 O 4 were prepared using metal chlorides as starting materials by controlled co-precipitation method as described by us earlier 29 and, the prepared ferrites were examined as catalysts in the synthesis of alkylaminophenols, 6, by three component condensation between salicylaldehyde, sec. Fe 3 O 4 , NiFe 2 O 4 , CoFe 2 O 4 and CuFe 2 O 4 were prepared using metal chlorides as starting materials by controlled co-precipitation method as described by us earlier 29 and, the prepared ferrites were examined as catalysts in the synthesis of alkylaminophenols, 6, by three component condensation between salicylaldehyde, sec.…”

Section: Resultsmentioning

confidence: 99%

Cobalt ferrite nanoparticles: a magnetically separable and reusable catalyst for Petasis-Borono–Mannich reaction

et al. 2015

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Magnetically separable cobalt ferrite nanoparticles (CoFe 2 O 4 , NPS) have been demonstrated for the first time as an efficient catalyst in Petasis-Borono-Mannich (PBM) reaction between salicylaldehydes, sec.amines and aryl boronic acids to furnish alkylaminophenols in high yields. Relatively shorter reaction times, easy purification of the products and reusability of the catalyst for five consecutive runs without appreciable loss in it's activity are the noteworthy features of the developed protocol.a Reaction conditions: salicylaldehyde (1 mmol), piperidine (1.2 mmol), phenyl boronic acid (1.2 mmol), acetonitrile (5 mL), catalyst. b Isolated yield. c Using water (5 mL) as the reaction medium.This journal is

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Nickel ferrite nanoparticles–hydrogen peroxide: a green catalyst-oxidant combination in chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides

Cited by 51 publications

References 35 publications

Structural, Magnetic, and Catalytic Evaluation of Spinel Co, Ni, and Co–Ni Ferrite Nanoparticles Fabricated by Low-Temperature Solution Combustion Process

Structural, Magnetic, and Catalytic Evaluation of Spinel Co, Ni, and Co–Ni Ferrite Nanoparticles Fabricated by Low-Temperature Solution Combustion Process

Stable room temperature magnetic ordering and excellent catalytic activity of mechanically activated high surface area nanosized Ni_0.45Zn_0.55Fe₂O₄

Cobalt ferrite nanoparticles: a magnetically separable and reusable catalyst for Petasis-Borono–Mannich reaction

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Nickel ferrite nanoparticles–hydrogen peroxide: a green catalyst-oxidant combination in chemoselective oxidation of thiols to disulfides and sulfides to sulfoxides

Cited by 51 publications

References 35 publications

Structural, Magnetic, and Catalytic Evaluation of Spinel Co, Ni, and Co–Ni Ferrite Nanoparticles Fabricated by Low-Temperature Solution Combustion Process

Structural, Magnetic, and Catalytic Evaluation of Spinel Co, Ni, and Co–Ni Ferrite Nanoparticles Fabricated by Low-Temperature Solution Combustion Process

Stable room temperature magnetic ordering and excellent catalytic activity of mechanically activated high surface area nanosized Ni0.45Zn0.55Fe2O4

Cobalt ferrite nanoparticles: a magnetically separable and reusable catalyst for Petasis-Borono–Mannich reaction

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Stable room temperature magnetic ordering and excellent catalytic activity of mechanically activated high surface area nanosized Ni_0.45Zn_0.55Fe₂O₄