scholarly journals Copper ferrite nanoparticle modified starch as a highly recoverable catalyst for room temperature click chemistry: multicomponent synthesis of 1,2,3-triazoles in water

2018 ◽  
Vol 42 (4) ◽  
pp. 3078-3086 ◽  
Author(s):  
Reza Bonyasi ◽  
Mohammad Gholinejad ◽  
Fariba Saadati ◽  
Carmen Nájera
Keyword(s):  
Click Chemistry ◽  
Room Temperature ◽  
Click Reaction ◽  
Copper Ferrite ◽  
Modified Starch ◽  
Multicomponent Synthesis ◽  
Water Dispersible ◽  
Recoverable Catalyst ◽  
Ferrite Nanoparticle

Highly water dispersible CuFe2O4@Starch catalyzed click reaction.

scholarly journals Clean one-pot multicomponent synthesis of pyrans using a green and magnetically recyclable heterogeneous nanocatalyst

SynOpen ◽  
2021 ◽  
Author(s):  
Mina Ghassemi ◽  
Ali Maleki
Keyword(s):  
Room Temperature ◽  
Significant Loss ◽  
Copper Ferrite ◽  
Multicomponent Synthesis ◽  
Thermo Gravimetric ◽  
Sem Images ◽  
One Pot ◽  
Three Component Reaction ◽  
Ft Ir ◽  
The One

Copper ferrite (CuFe2O4) magnetic nanoparticles (MNPs) were synthesized via thermal decomposition method and applied as a reusable and green catalyst in the synthesis of functionalized 4H-pyran derivatives using malononitrile, an aromatic aldehyde and a β-ketoester in ethanol at room temperature. Then it was characterized by Fourier transform infrared spectroscopy (FT-IR), energy-dispersive X-ray spectroscopy (EDX) analysis, scanning electron microscopy (SEM) images, thermo gravimetric and differential thermo gravimetric (TGA/DTG) analysis. The catalyst was recovered from the reaction mixture by applying an external magnet and decanting the mixture. Recycled catalyst was reused for several times without significant loss in its activity. Running the one-pot three-component reaction at room temperature, no use of eternal energy source and using a green solvent provide benign, mild, and environmentally friendly reaction conditions; as well, ease of catalyst recovering, catalyst recyclability, no use of column chromatography and good to excellent yields are extra advantages of this work.

Cobalt-Copper Ferrite Nanoparticles Catalyzed Click Reaction at Room-Temperature: Green Access to 1,2,3-Triazole Derivatives

2018 ◽  
Vol 3 (9) ◽  
pp. 2586-2593 ◽  
Author(s):  
Firouz Matloubi Moghaddam ◽  
Raheleh Pourkaveh ◽  
Marzieh Ahangarpour
Keyword(s):  
Room Temperature ◽  
Click Reaction ◽  
Ferrite Nanoparticles ◽  
Copper Ferrite ◽  
Triazole Derivatives ◽  
Cobalt Copper

scholarly journals Large-scale preparation for efficient polymer-based room-temperature phosphorescence via click chemistry

2020 ◽  
Vol 6 (21) ◽  
pp. eaaz6107 ◽  
Author(s):  
R. Tian ◽  
S.-M. Xu ◽  
Q. Xu ◽  
C. Lu
Keyword(s):  
Click Chemistry ◽  
Polymer Matrix ◽  
Large Scale ◽  
Room Temperature ◽  
Click Reaction ◽  
Covalent Binding ◽  
Scale Up ◽  
Polymeric Materials ◽  
Ab Initio Molecular Dynamics ◽  
Room Temperature Phosphorescence

To achieve efficient polymer-based room-temperature phosphorescence (RTP) materials, covalently embedding phosphors into the polymer matrix appeared as the most appealing approach. However, it is still highly challenging to fabricate RTP materials on a large scale because of the inefficient binding engineering and time-consuming covalent reactions. Here, we have proposed a scalable preparation approach for RTP materials by the facile B─O click reaction between boronic acid–modified phosphors and polyhydroxy polymer matrix. The ab initio molecular dynamics simulations demonstrated that the phosphors were effectively immobilized, resulting in the suppressed nonradiative transitions and activated RTP emission. In comparison to the reported covalent binding time of several hours, such a B─O click reaction can be accomplished within 20 s under ambient environment. The developed strategy simplified the construction of polymer-based RTP polymeric materials by the introduction of facile click chemistry. Our success provides inspirations and possibilities for the scale-up production of RTP materials.

Green multicomponent synthesis of four different classes of six-membered N-containing and O-containing heterocycles catalyzed by an efficient chitosan-based magnetic bionanocomposite

2018 ◽  
Vol 90 (2) ◽  
pp. 387-394 ◽  
Author(s):  
Ali Maleki ◽  
Mina Ghassemi ◽  
Razieh Firouzi-Haji
Keyword(s):  
Room Temperature ◽  
Thermo Gravimetric Analysis ◽  
Gravimetric Analysis ◽  
Multicomponent Synthesis ◽  
Step Method ◽  
Sem Images ◽  
One Pot ◽  
Recoverable Catalyst ◽  
Ft Ir ◽  
The One

Abstract In this work, an efficient chitosan-based magnetic bionanocomposite was synthesized via a two-step method and characterized by Fourier-transform infrared (FT-IR) spectroscopy, thermo gravimetric analysis (TGA), energy-dispersive X-ray (EDX) analysis and scanning electron microscopy (SEM) images. Then, it was used as a heterogeneous catalyst for the one-pot multicomponent syntheses of a variety of heterocyclic compounds including 2-amino-4H-pyrans, 2-amino-4H-chromens and polyhydroquinoline derivatives in ethanol at room temperature. The catalyst was simply separated from the reaction mixture by an external magnet and reused several times. The products were isolated from the reaction mixtures, without any need of column chromatography, in high-to-excellent yields. A reusable and easily recoverable catalyst, use of a green solvent, room temperature and mild reaction conditions are some advantages of the present work.

Synthesis of copper containing polyaniline composites through interfacial polymerisation: An effective catalyst for Click reaction at room temperature

2021 ◽  
Vol 1233 ◽  
pp. 130019
Author(s):  
Mitali Chetia ◽  
Manashjyoti Konwar ◽  
Biswajit Pegu ◽  
Surajit Konwer ◽  
Diganta Sarma
Keyword(s):  
Room Temperature ◽  
Click Reaction ◽  
Effective Catalyst ◽  
Polyaniline Composites

scholarly journals Highly Water Dispersible Functionalized Graphene by Thermal Thiol-Ene Click Chemistry

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2830
Author(s):  
Farzaneh Farivar ◽  
Pei Lay Yap ◽  
Tran Thanh Tung ◽  
Dusan Losic
Keyword(s):  
Click Reaction ◽  
High Water ◽  
Pristine Graphene ◽  
Functionalized Graphene ◽  
Specific Chemical ◽  
Simple Modification ◽  
Water Dispersible ◽  
Chemical Hazards ◽  
Water Dispersibility ◽  
C And N

Functionalization of pristine graphene to achieve high water dispersibility remains as a key obstacle owing to the high hydrophobicity and absence of reactive functional groups on the graphene surface. Herein, a green and simple modification approach to prepare highly dispersible functionalized graphene via thermal thiol-ene click reaction was successfully demonstrated on pristine graphene. Specific chemical functionalities (–COO, –NH2 and –S) on the thiol precursor (L-cysteine ethyl ester) were clicked directly on the sp2 carbon of graphene framework with grafting density of 1 unit L-cysteine per 113 carbon atoms on graphene. This functionalized graphene was confirmed with high atomic content of S (4.79 at % S) as well as the presence of C–S–C and N–H species on the L-cysteine functionalized graphene (FG-CYS). Raman spectroscopy evidently corroborated the modification of graphene to FG-CYS with an increased intensity ratio of D and G band, ID/IG ratio (0.3 to 0.7), full-width at half-maximum of G band, FWHM [G] (20.3 to 35.5) and FWHM [2D] (64.8 to 90.1). The use of ethanol as the reaction solvent instead of common organic solvents minimizes the chemical hazards exposure to humans and the environment. This direct attachment of multifunctional groups on the surface of pristine graphene is highly demanded for graphene ink formulations, coatings, adsorbents, sensors and supercapacitor applications.

One-pot multicomponent synthesis of highly functionalized bio-active pyrano[2,3-c]pyrazole and benzylpyrazolyl coumarin derivatives using ZrO2 nanoparticles as a reusable catalyst

2015 ◽  
Vol 17 (5) ◽  
pp. 2859-2866 ◽  
Author(s):  
Arijit Saha ◽  
Soumen Payra ◽  
Subhash Banerjee
Keyword(s):  
Room Temperature ◽  
Zro2 Nanoparticles ◽  
Reusable Catalyst ◽  
Coumarin Derivatives ◽  
Multicomponent Synthesis ◽  
One Pot

Herein, a facile one-pot multicomponent protocol for the synthesis of biologically important pyrano[2,3-c]pyrazole and benzylpyrazolyl coumarin derivatives has been demonstrated using ZrO2 nanoparticles as reusable catalyst at room temperature.

Water-dispersible fluorescent nanodiamonds for biological imaging prepared by thiol-ene click chemistry

2019 ◽  
Vol 95 ◽  
pp. 481-486 ◽  
Author(s):  
Hongye Huang ◽  
Meiying Liu ◽  
Ruming Jiang ◽  
Junyu Chen ◽  
Qiang Huang ◽  
...  
Keyword(s):  
Click Chemistry ◽  
Biological Imaging ◽  
Water Dispersible ◽  
Fluorescent Nanodiamonds

Fully biodegradable antibacterial hydrogels via thiol–ene “click” chemistry

2014 ◽  
Vol 5 (13) ◽  
pp. 4002-4008 ◽  
Author(s):  
Hong Du ◽  
Guangyu Zha ◽  
Lilong Gao ◽  
Huan Wang ◽  
Xiaodong Li ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Click Chemistry ◽  
Click Reaction ◽  
Poly Ethylene Glycol ◽  
Physiological Conditions ◽  
Poly Ethylene

Novel biodegradable antimicrobial hydrogels, which are promising for use as biomaterials, were prepared facilely via a thiol–ene “click” reaction under human physiological conditions using multifunctional poly(ethylene glycol) (PEG) derivatives as precursors.

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