An Analogue of Grubbs Third-Generation Catalyst with Fluorophilic Pyridine Ligands: Fluorous/Organic Phase-Transfer Activation of Ring-Closing Alkene Metathesis

ChemCatChem ◽  
2015 ◽  
Vol 8 (1) ◽  
pp. 125-128 ◽  
Author(s):  
Janos Balogh ◽  
Antisar R. Hlil ◽  
Haw-Lih Su ◽  
Zhenxing Xi ◽  
Hassan S. Bazzi ◽  
...  
Keyword(s):  
Organic Phase ◽  
Phase Transfer ◽  
Third Generation ◽  
Pyridine Ligands

scholarly journals Synthesis by Reversed Phase Transfer Catalysis and Characterization of Naphthol AS-D Pigment

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Eleonora Cornelia Crasmareanu ◽  
Vasile Simulescu ◽  
Gheorghe Ilia
Keyword(s):  
Carboxylic Acid ◽  
Organic Phase ◽  
Reaction Rate ◽  
Phase Transfer Catalysis ◽  
Phase Transfer ◽  
Coupling Reaction ◽  
Reversed Phase ◽  
Azo Coupling ◽  
Unconventional Method

Reversed phase transfer catalysis (RPTC) was applied to synthesize the Naphthol AS-D pigment. This method consists in the transfer of the aryldiazonium cation 4-nitrobenzenediazonium from aqueous medium into the organic phase (nitrobenzene) in the form of a lipophilic ions pair by the catalyst used (perfluorooctyl potassium sulfonates). In the organic phase the azo-coupling reaction between 4-nitrobenzenediazonium chloride and 3-hydroxy-2-carboxylic acid 2-methyl-anilide (Naphthol AS-D) takes place as coupling component. Using this unconventional method of synthesis, an increase of the reaction rate, combined with a higher purity of the product, was obtained.

Reversible Phase Transfer of Carbon Dots between an Organic Phase and Aqueous Solution Triggered by CO2

2018 ◽  
Vol 57 (14) ◽  
pp. 3687-3691 ◽  
Author(s):  
Xiaoyan Pei ◽  
Dazhen Xiong ◽  
Huiyong Wang ◽  
Shuaiqi Gao ◽  
Xinying Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Organic Phase ◽  
Carbon Dots ◽  
Phase Transfer ◽  
Reversible Phase

Nanoscale Hollow-Bubbly Polypyrrole Obtained via Interfacial Polymerization with Phase Transfer Catalyst

2014 ◽  
Vol 809-810 ◽  
pp. 114-121
Author(s):  
Deng Pan Dong ◽  
Qing Hao Yang ◽  
Lin Tao Yang ◽  
Zhen Zhong Hou ◽  
Zhong Yi Tu
Keyword(s):  
Aqueous Phase ◽  
Organic Phase ◽  
Interfacial Polymerization ◽  
Phase Transfer ◽  
Phase Transfer Catalyst ◽  
Cyclic Voltammograms ◽  
Scanning Electronic Microscopy ◽  
Defect Control ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Crown ether 18C6 was used as a phase transfer catalyst (PTC) for the interfacial polymerization of polypyrrole (PPy). Usually, in interfacial reacting system, oxidant FeCl3was dissolved in deionized water to form aqueous phase, while pyrrole was dissolved in chloroform to form organic phase. The 18C6 PTC can efficiently form complexes with Fe (III) and transfer Fe (III) from aqueous phase into organic phase, resulting in nanoscale hollow-bubbly PPy with better electronic properties. UV-vis was used to confirm the phase transfer ability of composed Fe (III). Cyclic Voltammograms (CVs) were used to characterize capacitance property of PPy. Fourier Transition Infrared (FT-IR) spectroscopy and Scanning Electronic Microscopy (SEM) were carried out to investigate the microstructure of PPy. Finally, defect control migration growth mechanism of PPy during the polymerization has been carefully discussed.

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