Phosphoric acid functionalized graphene oxide: A highly dispersible carbon-based nanocatalyst for the green synthesis of bio-active pyrazoles

Zakeri, Masoumeh; Abouzari‐Lotf, Ebrahim; Miyake, Mikio; Mehdipour‐Ataei, Shahram; Shameli, Kamyar

doi:10.1016/j.arabjc.2017.11.006

Cited by 33 publications

(22 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The higher catalytic activity of Fe 3 O 4 ‐Ag@OPO(OH) 2 NCs may be ascribed to its excellent dispersion in aqueous solution, which is due to the hydrophilic nature of the phosphoric acid group (─OPO(OH) 2 ) on the surface of Fe 3 O 4 ‐Ag@OPO(OH) 2 NCs. [ 50 ] The screening of different solvents showed that the functionalized Fe 3 O 4 ‐Ag@OPO(OH) 2 is more effective in polar‐protic solvents such as ethanol and water compared to organic solvents (e.g., CHCl 3 , CH 2 Cl 2 , DMF, THF, and CH 3 CN).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Highly dispersible Fe₃O₄‐Ag@OPO(OH)₂ nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol

Hojjati

Soleimani

2020

J Chinese Chemical Soc

View full text Add to dashboard Cite

In this study, Fe3O4‐Ag@OPO(OH)2 nanocomposites (NCs) were synthesized using Camellia sinensis leaf extract. This herbal extract was utilized to reduce silver(I) ions to silver nanoparticles (NPs) on the surface of magnetite. The solution color changes from bright to dark, along with the new absorption band at λmax 410 nm confirms the deposition of nanosilver on the magnetite surface. The X‐ray powder diffraction (XRD) analysis was used to characterize the diffraction patterns of silver and magnetite phases and to calculate the average size of the crystallites being 21 nm. The fourier transform infrared (FT‐IR) spectra of green prepared of Fe3O4‐Ag@OPO(OH)2 NCs illustrated the functional group peaks of flavonoids and other phenolic compounds. The energy dispersive X‐ray (EDS) spectra of Fe3O4‐Ag@OPO(OH)2 NCs proved the presence of localized elements, which are incorporated into prepared NCs containing Ag, Fe, O, and P. The vibrating‐sample magnetometer (VSM) analysis indicated that the magnetic nature of Fe3O4‐Ag@OPO(OH)2 NCs is less than Fe3O4 NPs, which is attributed to nonmagnetic nature of Ag NPs and covering the magnetite surface by layers of silver and phosphate. The eco‐friendly synthesized Fe3O4‐Ag@OPO(OH)2 NCs exhibited high catalytic activity toward reducing p‐nitrophenol.

show abstract

Section: Resultsmentioning

confidence: 99%

“…The prepared nanocatalyst (GO‐OPO(OH) 2 ) exhibited catalytic performance toward the multicomponent synthesis of pyrano‐pyrazole, with 80–90% yield within 15 min in the aqueous solution. [ 50 ]…”

Section: Introductionmentioning

confidence: 99%

Highly dispersible Fe₃O₄‐Ag@OPO(OH)₂ nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol

Hojjati

Soleimani

2020

J Chinese Chemical Soc

View full text Add to dashboard Cite

show abstract

“…Zakeri et al [ 67 ] synthesized a novel dispersible phosphoric acid‐functionalized GO. The phosphonate GO nanocatalyst was examined to prepare dihydropyrano[2,3‐c] pyrazole derivatives by employing various aromatic aldehydes, ethyl acetoacetates, malononitrile, and hydrazine hydrate by refluxing in H 2 O for 15 min.…”

Section: Go As a Catalyst For Organic Transformationsmentioning

confidence: 99%

Recent advancements in organic synthesis catalyzed by graphene oxide metal composites as heterogeneous nanocatalysts

Soni¹,

Sethiya²,

Sahiba³

et al. 2021

Applied Organom Chemis

View full text Add to dashboard Cite

In the last decades, heterogeneous catalysis has emerged as a promising approach for sustainable synthesis. Among this, metal‐based graphene oxide (GO) as catalysts is widely used due to their unique properties such as physical and thermal stability of the catalysts in successive reaction runs and reusability. Metal‐supported GOs are quite prevalent and probably suitable acidic catalysts for both research laboratories and industrial processes. Herein, we have described the catalytic efficiency of various metal‐supported GO catalysts in different organic transformations like oxidation, reduction, multicomponent reactions, alkylation, condensation, dehydration, dehydrogenation, and Suzuki, Heck, and Sonogashira reactions. This article has been divided into three subsections: (i) GO‐supported metal as a catalyst, (ii) GO‐supported bimetal as a catalyst, and (iii) GO‐supported metal oxide as a catalyst for the easier understanding of the vast community of researchers. The foremost aim of this article is to summarize the uses of metal‐supported GO in the preparation of diverse synthetic molecules. The recent advancements in GO metal composites as catalysts with their applications have been deliberated.

show abstract

“…In addition, phosphonic -based materials show excellent complexing properties and can interact with a wide range of metal ions [19,20]. However, in the literature, phoshponic graphene derivatives have rarely been reported and only a few works in this subject can be found [21,22,23,24,25]. Ball-milling is a simple and effective, low-cost method for production of carbon nanoplatelets and allows for producing graphene-derivatives on a large scale.…”

Section: Introductionmentioning

confidence: 99%

Solvent-Free Synthesis of Phosphonic Graphene Derivative and Its Application in Mercury Ions Adsorption

et al. 2019

View full text Add to dashboard Cite

Functionalized graphene was efficiently prepared through ball-milling of graphite in the presence of dry ice. In this way, oxygen functional groups were introduced into material. The material was further chemically functionalized to produce graphene derivative with phosphonic groups. The obtained materials were characterized by spectroscopic and microscopic methods, along with thermogravimetric analysis. The newly developed material was used as an efficient mercury adsorbent, showing high adsorption efficiency. The adsorption isotherms were fitted using Freundlich and Langmuir models. The adsorption kinetics were fitted with pseudo-first order and pseudo-second order models. Adsorption selectivity was determined in the presence of cadmium ions and nickel ions. The presence of mentioned bivalent ions in the solution did not affect mercury adsorption efficiency.

show abstract

Phosphoric acid functionalized graphene oxide: A highly dispersible carbon-based nanocatalyst for the green synthesis of bio-active pyrazoles

Cited by 33 publications

References 55 publications

Highly dispersible Fe₃O₄‐Ag@OPO(OH)₂ nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol

Highly dispersible Fe₃O₄‐Ag@OPO(OH)₂ nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol

Recent advancements in organic synthesis catalyzed by graphene oxide metal composites as heterogeneous nanocatalysts

Solvent-Free Synthesis of Phosphonic Graphene Derivative and Its Application in Mercury Ions Adsorption

Contact Info

Product

Resources

About

Phosphoric acid functionalized graphene oxide: A highly dispersible carbon-based nanocatalyst for the green synthesis of bio-active pyrazoles

Cited by 33 publications

References 55 publications

Highly dispersible Fe3O4‐Ag@OPO(OH)2 nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol

Highly dispersible Fe3O4‐Ag@OPO(OH)2 nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol

Recent advancements in organic synthesis catalyzed by graphene oxide metal composites as heterogeneous nanocatalysts

Solvent-Free Synthesis of Phosphonic Graphene Derivative and Its Application in Mercury Ions Adsorption

Contact Info

Product

Resources

About

Highly dispersible Fe₃O₄‐Ag@OPO(OH)₂ nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol

Highly dispersible Fe₃O₄‐Ag@OPO(OH)₂ nanocomposites as a novel eco‐friendly magnetic retrievable catalyst for the reduction of p‐nitrophenol