The Synthesis of Mesoporous Ag/SBA-15 and Catalytic Reaction of Propargylamines via a Three-Component Coupling Reaction of Aldehyde, Alkyne and Amine

2012 ◽  
Vol 550-553 ◽  
pp. 336-339 ◽  
Author(s):  
Dong Tian
Keyword(s):  
Catalytic Activity ◽  
Heterogeneous Catalysis ◽  
Catalytic Reaction ◽  
Ag Nanoparticles ◽  
Coupling Reaction ◽  
Mesoporous Silicas ◽  
Step Method ◽  
One Step ◽  
Adsorption Desorption ◽  
Three Component Coupling

Mesoporous silicas SBA-15 with Ag nanoparticles in the channel was synthesized by one-step method. Samples characterzation were performed by the XRD, TEM, adsorption/desorption of nitrogen and ICP-AES. And the heterogeneous catalysis(Ag/SBA-15) shows catalytic activity in three-component coupling reaction of aldehyde, alkyne, and amine.

scholarly journals PEG-embedded KBr3: A recyclable catalyst for multicomponent coupling reaction for the efficient synthesis of functionalized piperidines

2011 ◽  
Vol 7 ◽  
pp. 1334-1341 ◽  
Author(s):  
Sanny Verma ◽  
Suman L Jain ◽  
Bir Sain
Keyword(s):  
Coupling Reaction ◽  
Recyclable Catalyst ◽  
Efficient Synthesis ◽  
Molecular Bromine ◽  
Keto Ester ◽  
One Step ◽  
High Yields ◽  
Multicomponent Coupling ◽  
Three Component Coupling

PEG-embedded potassium tribromide ([K+PEG]Br3 −) was found to be an efficient and recyclable catalyst for the synthesis of functionalized piperidines in high yields in a one step, three component coupling between aldehyde, amine and β-keto ester. At the end of the reaction the [K+PEG]Br3 − was readily regenerated from the reaction mixture by treating the residue containing [K+PEG]Br− with molecular bromine.

Preparation of PdxAuy bimetallic nanostructures with controllable morphologies supported on reduced graphene oxide nanosheets and wrapped in a polypyrrole layer

RSC Advances ◽  
2015 ◽  
Vol 5 (107) ◽  
pp. 87831-87837 ◽  
Author(s):  
Tongjie Yao ◽  
Quan Zuo ◽  
Hao Wang ◽  
Jie Wu ◽  
Xiao Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Catalytic Activity ◽  
Reduced Graphene Oxide ◽  
Graphene Oxide Nanosheets ◽  
Step Method ◽  
Reduced Graphene ◽  
One Step ◽  
Good Catalytic Activity ◽  
Alloy Nanostructures ◽  
Bimetallic Nanostructures

A one-step method to prepare reduced graphene oxide/PdxAuy/polypyrrole composites with good catalytic activity was introduced. The morphologies of alloy nanostructures could turn to be spherical, coral-like and porous cluster-like.

Photocatalytic Performance of Ag Nanoparticles Modified ZnO Microplates Prepared by One-Step Method

2014 ◽  
Vol 10 (3) ◽  
pp. 389-393 ◽  
Author(s):  
Y.Q. Liang ◽  
Z.H. Gao ◽  
Z.D. Cui ◽  
S.L. Zhu ◽  
Z.Y. Li ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Photocatalytic Performance ◽  
Step Method ◽  
One Step

Electrospun Zn Doped CuFe2O4 Nanofibers with Enhanced Photo Fenton-Like Catalytic Activity

2021 ◽  
Vol 21 (3) ◽  
pp. 1517-1525
Author(s):  
Yongping Cui ◽  
Yaru Shang ◽  
Xiaohu Cheng ◽  
Ruixia Shi ◽  
Ping Yang
Keyword(s):  
Catalytic Activity ◽  
Catalytic Mechanism ◽  
Spinel Ferrite ◽  
Degradation Efficiency ◽  
X Ray Diffraction ◽  
Step Method ◽  
Uniform Size ◽  
Zn Content ◽  
Electrospinning Method ◽  
One Step

One dimensional Zn doped CuFe2O4 spinel ferrite nanofibers were successfully prepared via a facile electrospinning method followed by two different calcination routes. The results showed that the as-prepared nanofibers through two-step calcination exhibited more uniform size distribution in diameter compared with those calcined by one-step method. X-ray diffraction (XRD) results indicated that with the increase of Zn content the position of diffraction peaks of Zn doped CuFe2O4 slightly shift towards lower 2θ angle because the ionic sizes of the Zn2+ (0.74 Å) is larger than that of Cu2+ (0.69 Å). Fourier transform infrared spectroscopy (FTIR) results showed that with increasing Zn content the position of vibrational band (590 cm−1) shifted towards the smaller wavenumber. Generally, photo-generated carriers increased with the increasing of Zn content. The photo Fenton-like catalytic results revealed that the doping of Zn facilitated the enhancement of degradation efficiency of catalysts. Additionally, 10 at.% Zn doped CuFe2O4 exhibited the best photo Fenton-like catalytic activity and the degradation efficiency of Rhodamine B (RhB) could reach 100% in 40 min. Finally, the enhancement of photo Fenton-like catalytic mechanism of the Zn doped CuFe2O4 nanofibers was mainly attributed to actived spinel structure lattice by Zn doping, which allows more Cu2+ and Fe3+ ions are involved in the photo Fenton-like catalytic reaction.

scholarly journals Synthesis and optical properties of composite films from P3HT and sandwich-like Ag–C–Ag nanoparticles

RSC Advances ◽  
2015 ◽  
Vol 5 (97) ◽  
pp. 79860-79867 ◽  
Author(s):  
Lingpeng Yan ◽  
Yamin Hao ◽  
Xiaoting Feng ◽  
Yongzhen Yang ◽  
Xuguang Liu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Ag Nanoparticles ◽  
Composite Films ◽  
Carbon Matrix ◽  
Carbon Shell ◽  
Hydrothermal Conditions ◽  
Step Method ◽  
Ag Nps ◽  
One Step

Sandwich-like Ag–C–Ag nanoparticles (Ag–C–Ag NPs) were synthesized under mild hydrothermal conditions in a one-step method with Ag encapsulated in the centre, uniformly dispersed in a carbon matrix and on a carbon shell.

Green Fabrication of Hydrogel-Immobilized Au@Ag Nanoparticles Using Tannic Acid and Application in Catalysis

2021 ◽  
Author(s):  
Hengxi He ◽  
Didier Astruc ◽  
Haibin Gu
Keyword(s):  
Tannic Acid ◽  
Ag Nanoparticles ◽  
Core Shell ◽  
Step Method ◽  
Shell Nanoparticles ◽  
Active Core ◽  
Catalytically Active ◽  
One Step ◽  
Core Shell Nanoparticles

Highly catalytically active core-shell nanoparticles (NPs) have attracted great attention towards applications. Herein, core-shell Au@AgNPs were simply obtained via a green and cheap one-step method using tannic acid (TA) as...

Rapid access to cinnamamides and piper amides via three component coupling of arylaldehydes, amines, and Meldrum's acid

2019 ◽  
Vol 21 (21) ◽  
pp. 5803-5807
Author(s):  
Santanu Ghosh ◽  
Chandan K. Jana
Keyword(s):  
Meldrum's Acid ◽  
Coupling Reagents ◽  
Step Method ◽  
Meldrum’S Acid ◽  
Rapid Access ◽  
One Step ◽  
Three Component Coupling

A practical one-step method for the synthesis of cinnamamides and piper amides without the aid of coupling reagents, oxidants, catalysts or any other additives has been developed.

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