Importance of weak interactions and conformational equilibrium in N -butyl- N -methylpiperidinium bis(trifluromethanesulfonyl) imide room temperature ionic liquids: Vibrational and theoretical studies

2014 ◽  
Vol 75 ◽  
pp. 107-117 ◽  
Author(s):  
Madhulata Shukla ◽  
Hemanth Noothalapati ◽  
Shinsuke Shigeto ◽  
Satyen Saha
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Conformational Equilibrium ◽  
Weak Interactions ◽  
Room Temperature Ionic Liquids ◽  
Theoretical Studies

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 Structure and dynamics of room temperature ionic liquids with bromide anion: results from 81 Br NMR spectroscopy

2015 ◽  
Vol 53 (5) ◽  
pp. 369-378 ◽  
Author(s):  
Takatsugu Endo ◽  
Mamoru Imanari ◽  
Yuki Hidaka ◽  
Hiroko Seki ◽  
Keiko Nishikawa ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Nmr Spectroscopy ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Bromide Anion ◽  
Structure And Dynamics

15N NMR studies provide insights into physico-chemical properties of room-temperature ionic liquids

2021 ◽  
Author(s):  
Christoph Wiedemann ◽  
David Fushman ◽  
Frank Bordusa
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Chemical Properties ◽  
Room Temperature Ionic Liquids ◽  
15N Nmr ◽  
Nmr Studies ◽  
Physico Chemical ◽  
Alternative Solvents

Ionic liquids (ILs) have gained a lot of attention as alternative solvents in many fields of science in the last two decades. It is known that the type of anion...

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