scholarly journals A green approach to the synthesis of Ag doped nano magnetic γ-Fe2O3@SiO2-CD core–shell hollow spheres as an efficient and heterogeneous catalyst for ultrasonic-assisted A3 and KA2 coupling reactions

RSC Advances ◽  
2017 ◽  
Vol 7 (58) ◽  
pp. 36807-36818 ◽  
Author(s):  
S. Sadjadi ◽  
M. Malmir ◽  
M. M. Heravi
Keyword(s):  
Heterogeneous Catalyst ◽  
Hollow Spheres ◽  
Core Shell ◽  
Coupling Reactions ◽  
Step Process ◽  
Green Approach ◽  
Ultrasonic Assisted ◽  
Template Free

Using a green approach and ultrasonic-assisted template-free five-step process, a novel heterogeneous catalyst, γ-Fe2O3@SiO2-CD/Ag hollow spheres (h-Fe2O3@SiO2-CD/Ag), was fabricated.

Ag-doped nano magnetic γ-Fe2O3@DA core–shell hollow spheres: an efficient and recoverable heterogeneous catalyst for A3 and KA2 coupling reactions and [3 + 2] cycloaddition

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96623-96634 ◽  
Author(s):  
A. Elhampour ◽  
M. Malmir ◽  
E. Kowsari ◽  
F. Boorboor ajdari ◽  
F. Nemati
Keyword(s):  
Hydrothermal Method ◽  
Heterogeneous Catalyst ◽  
Hollow Spheres ◽  
Reaction System ◽  
Core Shell ◽  
Coupling Reactions ◽  
Simple Hydrothermal Method ◽  
System P

An effective protocol for the fabrication of Ag-doped nano magnetic γ-Fe2O3@DA core–shell hollow spheres (h-Fe2O3@DA/Ag) by a simple hydrothermal method is demonstrated without any templates in the reaction system.

scholarly journals Mesoporous-silica-coated palladium-nanocubes as recyclable nanocatalyst in C–C-coupling reaction – a green approach

RSC Advances ◽  
2020 ◽  
Vol 10 (44) ◽  
pp. 26504-26507
Author(s):  
Darius Rohleder ◽  
Philipp Vana
Keyword(s):  
Mesoporous Silica ◽  
Coupling Reaction ◽  
Product Yield ◽  
Silica Shell ◽  
Single Step ◽  
Core Shell ◽  
Coating Process ◽  
Coupling Reactions ◽  
Green Approach

A green approach: in a single-step coating process a mesoporous silica shell was tailored onto palladium-nanocubes. Along with a PEG-matrix this core–shell-nanocatalyst could be recovered after C–C-coupling reactions and reused without any significant decrease in product yield.

Palladium nanoparticles immobilized on core–shell magnetic fibers as a highly efficient and recyclable heterogeneous catalyst for the reduction of 4-nitrophenol and Suzuki coupling reactions

2014 ◽  
Vol 2 (46) ◽  
pp. 19696-19706 ◽  
Author(s):  
Xuanduong Le ◽  
Zhengping Dong ◽  
Yansheng Liu ◽  
Zhicheng Jin ◽  
Thanh-Do Huy ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Palladium Nanoparticles ◽  
Active Sites ◽  
Suzuki Coupling ◽  
Core Shell ◽  
Coupling Reactions ◽  
Highly Efficient ◽  
Recyclable Heterogeneous Catalyst

A novel core–shell magnetic fibrous nanocatalyst, Pd/Fe3O4@SiO2@KCC-1 with easily accessible active sites and a convenient recovery property, was successfully developed.

Transition-Metal-Free Synthetic Strategies for the Cross-Coupling Reactions in Water: A Green Approach

2020 ◽  
Vol 07 ◽  
Author(s):  
Tanmay Chatterjee ◽  
Nilanjana Mukherjee
Keyword(s):  
Transition Metal ◽  
Organic Solvents ◽  
Aqueous Media ◽  
Cross Coupling ◽  
Transition Metal Catalysts ◽  
Synthetic Methods ◽  
Coupling Reactions ◽  
Organic Transformations ◽  
Green Approach ◽  
Dehydrogenative Coupling

Abstract: A natural driving force is always working behind the synthetic organic chemists towards the development of ‘green’ synthetic methodologies for the synthesis of useful classes of organic molecules having potential applications. The majority of the essential classes of organic transformations, including C-C and C-X (X = heteroatom) bond-forming crosscoupling reactions, cross dehydrogenative-coupling (CDC) mostly rely on the requirement of transition-metal catalysts and hazardous organic solvents. Hence, the scope in developing green synthetic strategies by avoiding the use of transitionmetal catalysts and hazardous organic solvents for those important and useful classes of organic transformations is very high. Hence, several attempts are made so far. Water being the most abundant, cheap, and green solvent in the world; numerous synthetic methods have been developed in an aqueous medium. In this review, the development of transitionmetal- free green synthetic strategies for various important classes of organic transformations such as C-C and C-X bondforming cross-coupling, cross dehydrogenative-coupling, and oxidative-coupling in an aqueous media is discussed.

Template-free synthesis of ordered ZnO@ZnS core–shell arrays for high performance supercapacitors

2016 ◽  
Vol 45 (44) ◽  
pp. 17980-17986 ◽  
Author(s):  
Hailong Yan ◽  
Tong Li ◽  
Yang Lu ◽  
Jinbing Cheng ◽  
Tao Peng ◽  
...  
Keyword(s):  
High Performance ◽  
Shell Structures ◽  
Core Shell ◽  
Template Free

In this article, ordered ZnO@ZnS core–shell structures have been produced on a stainless mesh by a two-step approach without using a template.

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