Anchoring and stabilization of colloidal PdNPs on exfoliated bis-thiourea modified graphene oxide layers with super catalytic activity in water and PEG

Alamgholiloo, Hassan; Rostamnia, Sadegh; Pesyan, Nader Noroozi

doi:10.1016/j.colsurfa.2020.125130

Cited by 43 publications

(34 citation statements)

References 74 publications

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“…The performance of the new nanocatalyst (CMICSB-MGO-Pd) in the catalytic reduction of nitroarenes was preliminarily investigated using a model reaction of the reduction of nitrobenzene (NB) by NaBH4 in the presence of nanocatalyst. This reaction was performed under different conditions (catalyst dose and temperature) following a reduction protocol described in a previous study [25] to investigate the optimum catalytic conditions for new nanocatalyst. Brie y, aqueous solutions of NaBH 4 (1.0 -2.0 mmol) and NB (1.0 mmol) were mixed in in different solvents (5 mL).…”

Section: Catalytic Activity 231 Performance In Nitroarenes Reductionmentioning

confidence: 99%

Magnetic graphene oxide/carboxymethyl-imidazolium-grafted chitosan Schiff base nanocomposite: a new PdNPs support for efficient catalytic reduction of hazardous nitroarenes

Yahya

2022

Preprint

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The relevance of aryl amines as raw materials for a variety of applications has prompted substantial research into developing highly efficient protocols for hazardous nitroarenes reduction. To that end, a new sustainable and heterogeneous palladium nanocatalyst was fabricated by immobilization of PdNPs on the new magntic support composed of carboxymethyl-imidazolium ionic liquid-grafted chitosan Schiff base and magnetic graphene oxide (CMICSB-MGO) nanocomposites. The spectral, thermal, and microscopic analyses results revealed the successful formation of the magnetic support and nanocatalyst. The activity of the new nanocatalyst (CMICSB-MGO-Pd) in the catalytic reduction of hazardous nitroarenes to convert them into valuable aminoarenes was studied. The findings demonstrated that the new nanocatalyst has excellent catalytic activity, superior recoverability, as well as outstanding reusability under very mild reaction conditions. Moreover, this nanocatalyst can be recycled up to 8 catalytic runs, without significant loss in its efficacy or Pd leaching. Thus, the new magnetic support and nanocatalyst are more eco-friendly and sustainable choices for large-scale use and could pave the way for developing other metal-based catalysts for versatile applications in the future.

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Section: Catalytic Activity 231 Performance In Nitroarenes Reductionmentioning

confidence: 99%

Magnetic graphene oxide/carboxymethyl-imidazolium-grafted chitosan Schiff base nanocomposite: a new PdNPs support for efficient catalytic reduction of hazardous nitroarenes

Yahya

2022

Preprint

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“…Furthermore, the findings demonstrate the PEG-400 many applications in reactions including oxidation, [46] reduction, [47,48] addition, [49] substitution, [50] and coupling. [36,51] . The activity of the Ni@KP222/Fe 3 O 4 @PEG was enhanced under sonication and reduced reaction time dramatically in comparison with a high-speed stirrer and microwave (Table 1, entries 12 and 13).…”

Section: Catalytic Activitymentioning

confidence: 99%

Immobilization of nickel on Kryptofix 222 modified Fe₃O₄@PEG core‐shell nanosphere for the clean synthesis of 2‐Aryl‐2,3‐dihydroquinazolin‐4(1H)‐ones

Taghizadeh

Pesyan

Alamgholiloo

et al. 2022

Applied Organom Chemis

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The development of green‐based nanostructures is extremely compelling for their implementation in the catalytic arena. In this study, a new type of magnetically core‐shell nanocomposite was successfully designed to be used as a green catalyst for the synthesis of 2,3‐dihydroquinazolin‐4(1H)‐ones under ultrasonic irradiation. Initially, magnetic Fe3O4 nanoparticle (NP) cores were fabricated via the co‐operation method and subsequently coated with polyethylene glycol (PEG). After that, the macro‐bicyclic Kryptofix 222 (KP222) functionalized on the surface of Fe3O4@PEG for graft and stabilization of nickel metal. The obtained Ni@KP222/Fe3O4@PEG nanocomposite was characterized by FT‐IR (Fourier Transform Infrared), wide‐angle XRD (X‐ray Powder Difraction), FESEM (Field Emiossion Scanning Electron Microscopy), TEM (Transmission Electron Microscopy), VSM (Vibrating‐Sample Magnetometer), TGA‐DTA (Thermogravimetrtic Analysis‐ Differential Thermal Analysis), DLS (Dynamic Light Scattering), and BET (Brunauer–Emmett–Teller) spectroscopy and technique. The findings indicated that high‐affinity KP222 ligand in the stabilization of Ni2+ and ultrasound irradiation catalyzed synergistically the formation of the 2,3‐dihydroquinazolin‐4(1H)‐ones. The benzaldehydes with electron‐withdrawing and electron donor groups could react well with the amino benzamide under ultrasound irradiation in 5 min, indicating that the reaction was not sensitive to the electronic effects. Furthermore, the reusability test for the Ni@KP222/Fe3O4@PEG catalyst revealed successful recyclability for six runs. The current study provided a rational design and synthesis of multifunctional catalysts for catalytic applications.

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“…Such systems include preformed complexes of metals with a variety of ligands [10,11,14,15,17] in molecular form (i. e., homogeneous catalysts). All these types of systems have also been designed using organosulphur, organoselenium and organotellurium ligands [10,11,18–86] during last decade. The chalcogen donor containing systems are very popular due to their high efficiency and stability.…”

Section: Introductionmentioning

confidence: 99%

“…In addition to Suzuki coupling, they show catalytic potential for several other chemical transformations [10,11,87–107] too. In the recent past, some of such systems have also been used for its green catalysis in water and room temperature [20,21,27,33,34,44,48,49,50,55,61,63,66,73,74] . Microwave and ultrasound radiations have also been used as non‐conventional sources of energy for its catalysis [18,19,25,30,58,62] …”

Section: Introductionmentioning

confidence: 99%

Molecular Organosulphur, Organoselenium and Organotellurium Complexes as Homogeneous Transition Metal Catalytic Systems for Suzuki Coupling

et al. 2022

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During last two decades, researchers have employed organochalcogen compounds as ligands for the development of pre‐formed chalcogen ligated molecular complexes. During 2013–2020, various chalcogen containing homogenous catalytic systems for Suzuki Miyaura cross‐coupling reaction have been synthesized. The review provides insights into the synthetic methodologies for the preparation of organochalcogen ligands and their transition metal complexes. Another central aspect discussed is the application of such catalytic systems in Suzuki Miyaura coupling. Rationalization about the effect of temperature, substrate scope, organoborane derivatives and aryl halides employed has been elaborated. Effect of binding mode, ligand framework, chalcogen donor atom, metal and many other aspects that influence the catalytic potential of various systems have also been covered. Various other aspects such as green catalysis, use of non‐conventional energy sources have also been analyzed.

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Anchoring and stabilization of colloidal PdNPs on exfoliated bis-thiourea modified graphene oxide layers with super catalytic activity in water and PEG

Cited by 43 publications

References 74 publications

Magnetic graphene oxide/carboxymethyl-imidazolium-grafted chitosan Schiff base nanocomposite: a new PdNPs support for efficient catalytic reduction of hazardous nitroarenes

Magnetic graphene oxide/carboxymethyl-imidazolium-grafted chitosan Schiff base nanocomposite: a new PdNPs support for efficient catalytic reduction of hazardous nitroarenes

Immobilization of nickel on Kryptofix 222 modified Fe₃O₄@PEG core‐shell nanosphere for the clean synthesis of 2‐Aryl‐2,3‐dihydroquinazolin‐4(1H)‐ones

Molecular Organosulphur, Organoselenium and Organotellurium Complexes as Homogeneous Transition Metal Catalytic Systems for Suzuki Coupling

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Anchoring and stabilization of colloidal PdNPs on exfoliated bis-thiourea modified graphene oxide layers with super catalytic activity in water and PEG

Cited by 43 publications

References 74 publications

Magnetic graphene oxide/carboxymethyl-imidazolium-grafted chitosan Schiff base nanocomposite: a new PdNPs support for efficient catalytic reduction of hazardous nitroarenes

Magnetic graphene oxide/carboxymethyl-imidazolium-grafted chitosan Schiff base nanocomposite: a new PdNPs support for efficient catalytic reduction of hazardous nitroarenes

Immobilization of nickel on Kryptofix 222 modified Fe3O4@PEG core‐shell nanosphere for the clean synthesis of 2‐Aryl‐2,3‐dihydroquinazolin‐4(1H)‐ones

Molecular Organosulphur, Organoselenium and Organotellurium Complexes as Homogeneous Transition Metal Catalytic Systems for Suzuki Coupling

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Immobilization of nickel on Kryptofix 222 modified Fe₃O₄@PEG core‐shell nanosphere for the clean synthesis of 2‐Aryl‐2,3‐dihydroquinazolin‐4(1H)‐ones