Modified graphene supported Ag–Cu NPs with enhanced bimetallic synergistic effect in oxidation and Chan–Lam coupling reactions

Sharma, N. N.; Choudhary, Anu; Kaur, Manpreet; Sharma, Chandan; Paul, Satya; Gupta, Monika

doi:10.1039/d0ra01540g

Cited by 17 publications

(10 citation statements)

References 50 publications

(41 reference statements)

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“…The synergetic interactions between active metal sites may be enhanced by an organic linker that bridges different metal centers and plays a sensitive charge transfer role 79 . In General, our observations and reported mechanisms suggest a plausible mechanism for the Fe3O4@SiO2@4-ABPT/Cu-Ni catalyzed Sonogashira cross-coupling reaction based on oxidative addition and reductive elimination steps 77,80,81 . However, it is not possible to recognize with certainty which metal carries out the reaction via oxidative addition and reductive elimination 77 .…”

Section: Mechanistic Studysupporting

confidence: 53%

Conjugated Cu-Ni bimetallic complex supported on Fe 3 O 4 @SiO 2 : An efficient nanocatalyst with synergistic performance for the solvent-free Sonogashira, and C-N cross-couplings

Nasseri

Kassaee

et al. 2023

Preprint

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Synthesis of a novel Cu-Ni bimetallic system comprising magnetic nanoparticles as the core and 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole (4-ABPT) as a conjugated bridge between nickel and copper species is described. With low Cu and Ni loading (0.06 mol% Ni, 0.08 mol% Cu), the resulting Fe3O4@SiO2@4-ABPT/Cu-Ni is discovered to be a highly efficient catalyst for the Sonogashira and C-N cross-coupling reactions. It is well characterized by FT-IR, XRD, EDX, FE-SEM, TEM, ICP, VSM, TGA/DTG/DTA, and XPS techniques. Fe3O4@SiO2@4-ABPT/Cu-Ni as a nanocatalyst in the Sonogashira and C-N cross-coupling reactions is compatible with a wide range of amines and aryl halides and gives desired coupling products in high to excellent yields under palladium- and solvent-free conditions. The XPS results show that the 4-ABPT as a ligand can adjust electron transfer between Ni and Cu in Fe3O4@SiO2@4-ABPT/Cu-Ni, which promotes the formation and stabilization of Cu+ and Ni3+ species. Electronic interactions and the synergistic effect between these metals increase the selectivity and activity of Fe3O4@SiO2@4-ABPT/Cu-Ni as a catalyst in the Sonogashira and C-N cross-coupling reactions in comparison with its monometallic counterparts. Additionally, the magnetic properties of the Fe3O4@SiO2@4-ABPT/Cu-Ni make it easy to separate from the reaction mixture, and it can be reused several times without a significant loss in its catalytic activity or performance.

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Section: Mechanistic Studysupporting

confidence: 53%

Conjugated Cu-Ni bimetallic complex supported on Fe 3 O 4 @SiO 2 : An efficient nanocatalyst with synergistic performance for the solvent-free Sonogashira, and C-N cross-couplings

Nasseri

Kassaee

et al. 2023

Preprint

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“…Independently, the catalytic activity of modified graphene supported Ag–Cu NPs (Cu@Ag–TiO 2 –NGO) was assessed for N ‐arylation. [ 62 ] Titanium dioxide (TiO 2 ) as an inorganic agent and dicyandiamide as an organic precursor were used for GO modification. The synthetic procedure of the catalyst comprised two steps.…”

Section: Application Of Copper Modified Graphene Oxide Catalysts For Carbon‐nitrogen Bond Formationmentioning

confidence: 99%

Carbon–nitrogen bond formation using modified graphene oxide derivatives decorated with copper complexes and nanoparticles

Mirza‐Aghayan

Saeedi

Boukherroub

2021

Applied Organom Chemis

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Several catalytic reactions such as Ullmann, Chan–Lam, Huisgen 1,3‐dipolar cycloaddition, [2 + 3] cycloaddition, condensation, and coupling reactions under suitable conditions have been used for the synthesis of fundamental structures containing a carbon–nitrogen (C–N) bond. Graphene oxide (GO) and its derivatives as heterogeneous catalysts have attracted considerable attention for the synthesis of organic building blocks. Loading of GO derivatives with copper complexes or nanoparticles, as one of the most abundant and low toxic transition metals, allowed to design new composites with predominant ability to C–N bond formation. In this review article, we present a comprehensive overview on the synthesis of building blocks containing a C–N bond such as amines, triazoles, tetrazoles, propargyl amines, imidazoles, and benzodiazepines using GO derivatives loaded with copper complexes or nanoparticles.

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“…The solid supports help to maintain the size, shape, morphology of nanocatalysts and also limit the leaching of metal ions favorable for achieving durable and enhanced catalytic performance. The solid supports used prominently include graphene, 11,12 Zeolite, 13 Cellulose, [14][15][16] activated coke/carbon, 17,18 Sepiolite, 19 bentonite, 20 SiO 2 , 21,22 Al 2 O 3 23,24 etc. In general, the preparation of supported nanocatalysts is usually followed in two steps.…”

Section: Introductionmentioning

confidence: 99%

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

Ahmad

Hossain

2022

Mater. Adv.

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Modified graphene supported Ag–Cu NPs with enhanced bimetallic synergistic effect in oxidation and Chan–Lam coupling reactions

Abstract: Cu@Ag–TiO2–NGO prepared from modified graphene by simple methodology exhibits enhanced catalytic activity towards oxidation and Chan–Lam coupling due to the synergistic effect between Ag and Cu NPs.

Cited by 17 publications

References 50 publications

Conjugated Cu-Ni bimetallic complex supported on Fe 3 O 4 @SiO 2 : An efficient nanocatalyst with synergistic performance for the solvent-free Sonogashira, and C-N cross-couplings

Conjugated Cu-Ni bimetallic complex supported on Fe 3 O 4 @SiO 2 : An efficient nanocatalyst with synergistic performance for the solvent-free Sonogashira, and C-N cross-couplings

Carbon–nitrogen bond formation using modified graphene oxide derivatives decorated with copper complexes and nanoparticles

Supported nanocatalysts: recent developments in microwave synthesis for application in heterogeneous catalysis

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