Ionic tagged amine supported on magnetic nanoparticles: synthesis and application for versatile catalytic Knoevenagel condensation in water

RSC Advances ◽  
2014 ◽  
Vol 4 (63) ◽  
pp. 33175-33183 ◽  
Author(s):  
Anguo Ying ◽  
Fangli Qiu ◽  
Chenglin Wu ◽  
Huanan Hu ◽  
Jianguo Yang
Keyword(s):  
Magnetic Nanoparticles ◽  
Room Temperature ◽  
Knoevenagel Condensation ◽  
Nanoparticles Synthesis

Propylamine modified with imidazolium ionic moiety grafted onto magnetic nanoparticles (MNPs) was prepared and evaluated as a catalyst for Knoevenagel condensation in water at room temperature.

Knoevenagel Condensations Catalyzed by New Oil Shale Recyclable Catalyst at Room Temperature and Assisted by Ultrasounds Irradiations

2021 ◽  
Vol 37 (6) ◽  
pp. 1295-1301
Author(s):  
Elmustapha Ennesyry ◽  
Fathallaah Bazi ◽  
Bahija Mounir ◽  
M’hammed Elkouali Elkouali ◽  
Hassan Hannache ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Catalytic System ◽  
Oil Shale ◽  
Room Temperature ◽  
Knoevenagel Condensation ◽  
Recyclable Catalyst ◽  
Short Time

Functionalized alkenes were successfully synthesized via a clean procedure in a short time by using a new recycled heterogeneous catalyst prepared from Moroccan oil shale, this catalyst is characterized by different technics such XRD, BET-BJH, MEB-EDS, and TGA, before it’s has been used in the Knoevenagel condensation between different aldehydes and active methylenes. The results showed that coupling the catalyst with ultrasound irradiations could improve the catalytic system in this transformation by achieving the products in a very short time, the results showed clearly that this catalyst could be considered as excellent recyclable support in Knoevenagel condensation.

Expedient Catalytic Access to Knöevenagel Condensation Using Sr3Al2O6 Nanocomposite in Room Temperature

2017 ◽  
Vol 28 (6) ◽  
pp. 3253-3263 ◽  
Author(s):  
Faezeh Farzaneh ◽  
Mahtab Kashani Maleki ◽  
Elnaz Rashtizadeh
Keyword(s):  
Room Temperature ◽  
Knoevenagel Condensation

Thermal Conductivity Enhancement of Room Temperature Ionic Liquids (RTILs) With Various Magnetic Nanoparticles

2012 ◽  
Author(s):  
N. Y. Jagath B. Nikapitiya ◽  
Hyejin Moon
Keyword(s):  
Thermal Conductivity ◽  
Ionic Liquids ◽  
Magnetic Nanoparticles ◽  
Magnetic Fields ◽  
Room Temperature ◽  
Particle Concentration ◽  
Thermal Conductivity Enhancement ◽  
Room Temperature Ionic Liquids ◽  
Conductivity Enhancement ◽  
Magnetic Nanofluids

This paper reports an experimental study of thermal conductivity of room temperature ionic liquids (RTILs) based magnetic nanofluids. Various magnetic nanoparticles of metal oxides with high thermal conductivity, such as CuO, Al2O3, Fe3O4 and Carbon Nano Tubes (CNTs), were used to prepare magnetic nanofluids, while RTIL, trihexyl (tetradecyl) posphonium dicyanamide was used as the base fluid. Two major parameters that affect to the thermal conductivity enhancement of fluids were investigated. The effect of particle concentration and external magnetic fields were tested. It was observed that the magnetic nanofluids thermal conductivities increase with increment of particle concentration and external magnetic field parallel to the temperature gradient. Besides, it was observed that under higher magnetic fields, thermal conductivity enhancement tends to approach a saturation state. Surfactant was used to disperse magnetic nanoparticles within the RTILs. The transient hot wire method was used for this investigation.

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