Peptide nanofibers decorated with Pd nanoparticles to enhance the catalytic activity for C–C coupling reactions in aerobic conditions

RSC Advances ◽  
2014 ◽  
Vol 4 (6) ◽  
pp. 2984-2988 ◽  
Author(s):  
Indrajit Maity ◽  
Dnyaneshwar B. Rasale ◽  
Apurba K. Das
Keyword(s):  
Catalytic Activity ◽  
Pd Nanoparticles ◽  
Coupling Reactions ◽  
Aerobic Conditions ◽  
Peptide Nanofibers

Palladium Supported on Mesoporous Silica via a Two-Step Method as an Efficient Catalyst for Suzuki-Miyaura Coupling Reactions

2014 ◽  
Vol 1035 ◽  
pp. 89-95
Author(s):  
Pei Yu Wang ◽  
Guo Heng Zhang ◽  
Hai Yan Jiao ◽  
Xiao Ping Zheng
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Synthesis ◽  
Palladium Nanoparticles ◽  
Reduction Method ◽  
Pd Nanoparticles ◽  
Coupling Reactions ◽  
Step Method ◽  
Efficient Catalyst ◽  
Catalytic Activities ◽  
Highly Dispersed

In this paper, palladium-containing SBA-15 (Pd/SBA-15) was synthesized via a two-step method. In this procedure, Pd nanoparticles of 3-5 nm in size have been synthesized by formalin reduction method and incorporated into mesoporous SBA-15 silica during hydrothermal synthesis. The resulting nanocomposite with 1.20 wt% Pd loading was achieved with highly dispersed and uniform palladium nanoparticles. The catalytic activity of the Pd/SBA-15 nanocomposite was used as a catalyst for the Suzuki-Miyaura coupling reactions. The Pd/SBA-15 nanocomposite exhibited excellent catalytic activities and reuse ability in air for the Suzuki-Miyaura coupling reactions.

scholarly journals Catalytic activity of recyclable resorcinarene-protected antibacterial Pd nanoparticles in C-C coupling reactions

2016 ◽  
Vol 37 (2) ◽  
pp. 250-257 ◽  
Author(s):  
Urvi Panchal ◽  
Krunal Modi ◽  
Manthan Panchal ◽  
Viren Mehta ◽  
Vinod K. Jain
Keyword(s):  
Catalytic Activity ◽  
Pd Nanoparticles ◽  
Coupling Reactions

The effect of external magnetic fields on the catalytic activity of Pd nanoparticles in Suzuki cross-coupling reactions

Nanoscale ◽  
2016 ◽  
Vol 8 (15) ◽  
pp. 8355-8362 ◽  
Author(s):  
Lei Gao ◽  
Changlai Wang ◽  
Ren Li ◽  
Ran Li ◽  
Qianwang Chen
Keyword(s):  
Catalytic Activity ◽  
Magnetic Fields ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Coupling Reactions ◽  
Cross Coupling Reactions

scholarly journals Magnetically Recoverable Nanoparticulate Catalysts for Cross-Coupling Reactions: The Dendritic Support Influences the Catalytic Performance

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3345
Author(s):  
Nina V. Kuchkina ◽  
Svetlana A. Sorokina ◽  
Alexey V. Bykov ◽  
Mikhail G. Sulman ◽  
Lyudmila M. Bronstein ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
Magnetic Separation ◽  
Reaction Times ◽  
Cross Coupling ◽  
Pd Nanoparticles ◽  
Coupling Reactions ◽  
Green Solvents ◽  
Cross Coupling Reactions ◽  
Strong Stabilization

Carbon-carbon cross-coupling reactions are among the most important synthetic tools for the preparation of pharmaceuticals and bioactive compounds. However, these reactions are normally carried out using copper, phosphines, and/or amines, which are poisonous for pharmaceuticals. The use of nanocomposite catalysts holds promise for facilitating these reactions and making them more environmentally friendly. In the present work, the PEGylated (PEG stands for poly(ethylene glycol) pyridylphenylene dendrons immobilized on silica loaded with magnetic nanoparticles have been successfully employed for the stabilization of Pd2+ complexes and Pd nanoparticles. The catalyst developed showed excellent catalytic activity in copper-free Sonogashira and Heck cross-coupling reactions. The reactions proceeded smoothly in green solvents at low palladium loading, resulting in high yields of cross-coupling products (from 80% to 97%) within short reaction times. The presence of magnetic nanoparticles allows easy magnetic separation for repeated use without a noticeable decrease of catalytic activity due to the strong stabilization of Pd species by rigid and bulky dendritic ligands. The PEG dendron periphery makes the catalyst hydrophilic and better suited for green solvents. The minor drop in activity upon the catalyst reuse is explained by the formation of Pd nanoparticles from the Pd2+ species during the catalytic reaction. The magnetic separation and reuse of the nanocomposite catalyst reduces the cost of target products as well as energy and material consumption and diminishes residual contamination by the catalyst. These factors as well as the absence of copper in the catalyst makeup pave the way for future applications of such catalysts in cross-coupling reactions.

Photochemically synthesized palladium nanoparticles with catalytic activity at ppb levels for C–C coupling reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (87) ◽  
pp. 71253-71258 ◽  
Author(s):  
Abhijit Paul ◽  
Debnath Chatterjee ◽  
Rajkamal Rajkamal ◽  
Srirupa Banerjee ◽  
Somnath Yadav
Keyword(s):  
Catalytic Activity ◽  
Palladium Nanoparticles ◽  
Pd Nanoparticles ◽  
Photochemical Synthesis ◽  
Coupling Reactions ◽  
Catalytically Active

Herein we report a photochemical synthesis of Pd nanoparticles (Pd-NPs) that are catalytically active at 83 ppb for various C–C coupling reactions.

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