scholarly journals Effect of Counteranions on the Conformational Equilibrium of 1-Butyl-3-methylimidazolium-Based Ionic Liquids

2011 ◽  
Vol 2011 ◽  
pp. 1-5 ◽  
Author(s):  
Naohiro Hatano ◽  
Takahiro Takekiyo ◽  
Hiroshi Abe ◽  
Yukihiro Yoshimura
Keyword(s):  
Raman Spectroscopy ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Conformational Equilibrium ◽  
Conformational Stability ◽  
Enthalpy Change ◽  
Room Temperature Ionic Liquids ◽  
Anion Effect ◽  
Anionic Species ◽  
Entropic Contribution

We have investigated the nonspherical anion effect on the trans-trans (TT) and gauche-trans (GT) equilibrium in pure 1-butyl-3-methylimidazolium ([bmim]+)-based room temperature ionic liquids (RTILs) by the Raman spectroscopy. The intensity ratio of the [bmim]+ cation in [bmim]+-based RTILs having nonspherical anions changes with nature of the anions. However, the enthalpy change of the [bmim]+ cation is approximately −1.0 kJ/mol for all [bmim]+-based RTILs used in this study and is independent of the anionic species. The present results indicate that the conformational stability of the [bmim]+ cation in [bmim]+-based RTILs including nonspherical anions is driven by the entropic contribution associated with the orientation and configuration of the [bmim]+ cation with respect to the counteranion.

scholarly journals Ammonium based stabilizers effectively counteract urea-induced denaturation in a small protein: insights from molecular dynamics simulations

RSC Advances ◽  
2017 ◽  
Vol 7 (83) ◽  
pp. 52888-52906 ◽  
Author(s):  
Soham Sarkar ◽  
Soumadwip Ghosh ◽  
Rajarshi Chakrabarti
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Aqueous Solutions ◽  
Molecular Dynamics Simulations ◽  
Room Temperature ◽  
Conformational Stability ◽  
Deep Eutectic Solvents ◽  
Room Temperature Ionic Liquids ◽  
Small Protein ◽  
Dynamics Simulations

Room temperature ionic liquids (IL) and deep eutectic solvents (DES) are known to aid the conformational stability and activity of proteins and enzymes in aqueous solutions.

Anion effect on radiochemical stability of room-temperature ionic liquids under gamma irradiation

2009 ◽  
pp. 6175 ◽  
Author(s):  
G. Le Rouzo ◽  
C. Lamouroux ◽  
V. Dauvois ◽  
A. Dannoux ◽  
S. Legand ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Gamma Irradiation ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Anion Effect

Physicochemical Properties and Structures of Room Temperature Ionic Liquids. 1. Variation of Anionic Species

2004 ◽  
Vol 108 (42) ◽  
pp. 16593-16600 ◽  
Author(s):  
Hiroyuki Tokuda ◽  
Kikuko Hayamizu ◽  
Kunikazu Ishii ◽  
Md. Abu Bin Hasan Susan ◽  
Masayoshi Watanabe
Keyword(s):  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Anionic Species

Solute–solvent hydrogen-bonding in room temperature ionic liquids studied by Raman spectroscopy

2012 ◽  
Vol 14 (39) ◽  
pp. 13676 ◽  
Author(s):  
Akira Kobayashi ◽  
Koji Osawa ◽  
Masahide Terazima ◽  
Yoshifumi Kimura
Keyword(s):  
Raman Spectroscopy ◽  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids
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