Fourier Transform Infrared Study on Hydrogen Bonding Species of Carboxylic Acids in Supercritical Carbon Dioxide with Ethanol

1999 ◽  
Vol 103 (18) ◽  
pp. 3525-3529 ◽  
Author(s):  
Morio Yamamoto ◽  
Yoshio Iwai ◽  
Taro Nakajima ◽  
Yasuhiko Arai
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Bonding ◽  
Fourier Transform ◽  
Supercritical Carbon Dioxide ◽  
Carboxylic Acids ◽  
Fourier Transform Infrared ◽  
Infrared Study ◽  
Supercritical Carbon

Repair of Porous Methylsilsesquioxane Films using Supercritical Carbon Dioxide

2004 ◽  
Vol 812 ◽  
Author(s):  
Bo Xie ◽  
Anthony J. Muscat
Keyword(s):  
Carbon Dioxide ◽  
Dielectric Constant ◽  
Fourier Transform ◽  
Supercritical Carbon Dioxide ◽  
Ftir Spectroscopy ◽  
Oxygen Plasma ◽  
Contact Angles ◽  
Silanol Groups ◽  
Chain Lengths ◽  
Supercritical Carbon

AbstractPorous methylsilsesquioxane (p-MSQ) films (JSR LKD 5109) were treated with alkyldimethylmonochlorosilanes having chain lengths of one, four, and eight carbon atoms dissolved in supercritical carbon dioxide at 150-300 atm and 50-60°C to repair oxygen ashing damage. Fourier transform infrared (FTIR) spectroscopy showed that trimethylchlorosilane (TMCS), butyldimethylchlorosilane (BDMCS), and octyldimethylchlorosilane (ODMCS) reacted with silanol groups on the surfaces of the pores producing covalent Si-O-Si bonds. Selfcondensation between alkylsilanols produced a residue on the surface, which was partially removed using a pure scCO2 rinse. The hydrophobicity of the blanket p-MSQ surface was recovered after silylation treatment as shown by contact angles >85°. The initial dielectric constant of 2.4 ± 0.1 increased to 3.5 ± 0.1 after oxygen plasma ashing and was reduced to 2.6 ± 0.1 by TMCS, 2.8 ± 0.1 by BDMCS, and 3.2 by ODMCS.

Dye solubility in supercritical carbon dioxide. Effect of hydrogen bonding with cosolvents

1999 ◽  
Vol 16 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Poongunran Muthukumaran ◽  
Ram B. Gupta ◽  
Hwan-Do Sung ◽  
Jae-Jin Shim ◽  
Hyo-Kwang Bae
Keyword(s):  
Carbon Dioxide ◽  
Hydrogen Bonding ◽  
Supercritical Carbon Dioxide ◽  
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

Hydrogen Bonding in Poly(maleic acid) upon Charging:  A Solvent Deuteron NMR and Fourier Transform Infrared Study

1999 ◽  
Vol 32 (9) ◽  
pp. 3118-3121 ◽  
Author(s):  
J. de Groot ◽  
J. G. Hollander ◽  
L. H. Leyte-Zuiderweg ◽  
J. de Bleijser
Keyword(s):  
Hydrogen Bonding ◽  
Fourier Transform ◽  
Maleic Acid ◽  
Fourier Transform Infrared ◽  
Infrared Study ◽  
Deuteron Nmr
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