ChemInform Abstract: Lariat Ether Carboxylic Acids, O-Benzylhydroxamates and Hydroxamic Acids with Fluorinated Substituents: Synthesis, Metal Ion Complexation and Solubility in Supercritical Carbon Dioxide.

ChemInform ◽  
2000 ◽  
Vol 31 (42) ◽  
pp. no-no
Author(s):  
Sadik Elshani ◽  
Hongshan Du ◽  
Kenneth E. Laintz ◽  
Nicholas R. Natale ◽  
Chien M. Wai ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Carboxylic Acids ◽  
Metal Ion ◽  
Hydroxamic Acids ◽  
Metal Ion Complexation ◽  
Lariat Ether ◽  
Ion Complexation ◽  
Supercritical Carbon

Characterization and adsorptive properties of poly(1-vinylimidazole)/silica nanocomposites synthesized in supercritical carbon dioxide

e-Polymers ◽  
2015 ◽  
Vol 15 (4) ◽  
pp. 245-254 ◽  
Author(s):  
Wei Wang ◽  
Liqin Cao ◽  
Jide Wang ◽  
Jie Zhao ◽  
Xiujuan Wu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Metal Ion ◽  
Maximum Adsorption Capacity ◽  
Hydroxyl Groups ◽  
One Pot ◽  
Nanocomposite Particles ◽  
Silica Nanocomposite ◽  
Supercritical Carbon

AbstractPoly(1-vinylimidazole) (PVIm)/silica nanocomposite particles were prepared via free radical polymerization of VIm in the presence of unmodified silica and crosslinker N,N′-methylenebisacrylamide without any surfactant by a one-pot route in supercritical carbon dioxide. The strong acid-base interaction between the hydroxyl groups (acidic) of silica surfaces and the imidazole groups (basic) of 1-VIm was strong enough to promote the formation of long-stable PVIm/silica nanocomposite particles. Transmission electron microscopy and scanning electron microscopy results showed that the silica nanoparticles were encapsulated into the polymer and with a specific pore structure. Fourier transform infrared spectroscopy results suggested the strong interaction between PVIm and silica. The nanocomposites were shown to possess higher thermal stability than PVIm. A maximum surface area of 60.76 m2/g was obtained via standard nitrogen adsorption analysis. The property of the composite materials in terms of heavy metal ion removal was investigated. The maximum adsorption capacity of Cr (VI) is 331.5 mg/g in the experimental range.

Strong Lewis Acid−Lewis Base Interactions between Supercritical Carbon Dioxide and Carboxylic Acids:  Effects on Self-association

2003 ◽  
Vol 42 (25) ◽  
pp. 6280-6289 ◽  
Author(s):  
Philip W. Bell ◽  
Amol J. Thote ◽  
Yoonkook Park ◽  
Ram B. Gupta ◽  
Christopher B. Roberts
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Carboxylic Acids ◽  
Lewis Acid ◽  
Lewis Base ◽  
Strong Lewis Acid ◽  
Self Association ◽  
Supercritical Carbon

scholarly journals Solubility of Small-Chain Carboxylic Acids in Supercritical Carbon Dioxide

2010 ◽  
Vol 55 (11) ◽  
pp. 4922-4927 ◽  
Author(s):  
Darrell L. Sparks ◽  
L. Antonio Estévez ◽  
Rafael Hernandez ◽  
Jason McEwen ◽  
Todd French
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Carboxylic Acids ◽  
Small Chain ◽  
Supercritical Carbon

Asymmetric hydrogenation of α,β-unsaturated carboxylic acids in supercritical carbon dioxide

1996 ◽  
Vol 37 (16) ◽  
pp. 2813-2816 ◽  
Author(s):  
Jianliang Xiao ◽  
Sylvia C.A. Nefkens ◽  
Philip G. Jessop ◽  
Takao Ikariya ◽  
Ryoji Noyori
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Carboxylic Acids ◽  
Asymmetric Hydrogenation ◽  
Unsaturated Carboxylic Acids ◽  
Supercritical Carbon
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