Shape-dependent catalytic activity of Fe3O4 nanostructures under the influence of an external magnetic field for multicomponent reactions in aqueous media

RSC Advances ◽  
2015 ◽  
Vol 5 (90) ◽  
pp. 74091-74101 ◽  
Author(s):  
E. Rafiee ◽  
M. Joshaghani ◽  
P. Ghaderi-Shekhi Abadi
Keyword(s):  
Magnetic Field ◽  
Catalytic Activity ◽  
External Magnetic Field ◽  
Multicomponent Reactions ◽  
Aqueous Media ◽  
Imidazole Derivatives

Fe3O4 nanostructures were synthesized under external magnetic field, shown shape-dependent catalytic activity for the synthesis of imidazole derivatives in water.

scholarly journals New Trendy Magnetic C-Scorpionate Iron Catalyst and Its Performance towards Cyclohexane Oxidation

Catalysts ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 69 ◽  
Author(s):  
Ana Ribeiro ◽  
Inês Matias ◽  
Elisabete Alegria ◽  
Ana Ferraria ◽  
Ana Botelho do Rego ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Catalytic Activity ◽  
External Magnetic Field ◽  
Microwave Irradiation ◽  
Iron Catalyst ◽  
Cyclohexane Oxidation ◽  
Butyl Hydroperoxide ◽  
Tert Butyl Hydroperoxide ◽  
Synthetic Procedure ◽  
First Time

For the first time, a magnetic C-scorpionate catalyst was prepared from the iron(II) complex [FeCl2{κ3-HC(pz)3}] (pz = pyrazol-1-yl) and ferrite, using the sustainable mechanochemical synthetic procedure. Its catalytic activity for the cyclohexane oxidation with tert-butyl hydroperoxide (TBHP) was evaluated in different conditions, namely under microwave irradiation and under the effect of an external magnetic field. The use of such magnetic conditions significantly shifted the catalyst alcohol/ketone selectivity, thus revealing a promising, easy new protocol for tuning selectivity in important catalytic processes.

A novel magnetic NiFe2O4@graphene–Pd multifunctional nanocomposite for practical catalytic application

RSC Advances ◽  
2015 ◽  
Vol 5 (97) ◽  
pp. 79548-79555 ◽  
Author(s):  
Xiaohua Zhao ◽  
Xiang Liu
Keyword(s):  
Magnetic Field ◽  
Catalytic Activity ◽  
External Magnetic Field ◽  
Suzuki Reaction ◽  
Simple Application ◽  
Hybrid Catalyst ◽  
Catalytic Application

A novel NiFe2O4@GN–Pd was used as outstanding catalyst for the Suzuki reaction in EtOH/H2O. The hybrid catalyst could be recycled and reused with the simple application of an external magnetic field, while keeping similar catalytic activity for six successive reactions.

Heterogeneous gold(III)-catalyzed tandem cyclization of 2-alkynylbenzamides with ammonium acetate toward 1-aminoisoquinolines

2020 ◽  
pp. 174751982092473
Author(s):  
Weisen Yang ◽  
Yingying Du ◽  
Feiyan Yi ◽  
Mingzhong Cai
Keyword(s):  
Magnetic Field ◽  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
External Magnetic Field ◽  
Ammonium Acetate ◽  
Gold Catalyst ◽  
Apparent Loss ◽  
Tandem Cyclization ◽  
High Yields

Heterogeneous tandem cyclization of 2-alkynylbenzamides with ammonium acetate is achieved in acetonitrile at 85 °C using a magnetic nanoparticles-immobilized bipy-gold(III) complex and AgSbF6 as catalysts to afford a variety of 1-aminoisoquinoline derivatives in moderate to high yields. This heterogeneous gold catalyst can be easily recovered from the reaction mixture by simply applying an external magnetic field and can be recycled at least seven times without any apparent loss of catalytic activity.

RECOIL IMPLANTATION MÖSSBAUER EXPERIMENT ON 57Fe IN Ge IN THE PRESENCE OF AN EXTERNAL MAGNETIC FIELD

1980 ◽  
Vol 41 (C1) ◽  
pp. C1-445-C1-445
Author(s):  
G. Langouche ◽  
N. S. Dixon ◽  
L. Gettner ◽  
S. S. Hanna
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Recoil Implantation
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