scholarly journals Stability of ionic liquids in Brønsted-basic media

2020 ◽  
Vol 22 (16) ◽  
pp. 5225-5252 ◽  
Author(s):  
Stijn Raiguel ◽  
Wim Dehaen ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquids ◽  
Base Stability ◽  
The Stability

The stability of ionic liquids towards strong Brønsted bases is reviewed from a fundamental perspective, and approaches for improving the base stability of various classes of ionic liquids are discussed.

scholarly journals Mechanical and Electrical Performance of Flexible Polymer Film Designed for a Textile Electrically-Conductive Path

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2169
Author(s):  
Agnieszka Tabaczyńska ◽  
Anna Dąbrowska ◽  
Marcin Masłowski ◽  
Anna Strąkowska
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Surface Resistance ◽  
Conductive Filler ◽  
Extrusion Process ◽  
Electrical Performance ◽  
Electrically Conductive ◽  
Non Invasive ◽  
Flexible Polymer ◽  
The Stability

Electro-conductive paths that are mechanically resistant and stable during simulated aging cycles are promising, in relation to the non-invasive application in e-textiles in our everyday surroundings. In the paper, an analysis of the influence of electro-conductive filler, as well as ionic liquid on surface resistance is provided. Authors proved that depending on the tested variant, obtained surface resistance may vary from 50 kΩ (when 50 phr of Ag and [bmim][PF6] ionic liquid applied) to 26 GΩ (when 25 phr of Ag and [bmim][PF6] ionic liquid applied). The samples were also evaluated after simulated aging cycles and the stability of electric properties was confirmed. Moreover, it was proved that the addition of ionic liquids reduced the resistance of vulcanizates, while no significant influence of the extrusion process on conductivity was observed.

Theoretical investigation of the stability, reactivity, and the interaction of methyl-substituted peridinium-based ionic liquids

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Emmanuel A. Bisong ◽  
Hitler Louis ◽  
Tomsmith O. Unimuke ◽  
Victoria M. Bassey ◽  
John A. Agwupuye ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Electron Density ◽  
Density Functional ◽  
Natural Bond Orbital ◽  
Stabilization Energy ◽  
Basis Set ◽  
Bond Critical Point ◽  
Electronic Interaction ◽  
Donor And Acceptor ◽  
The Stability

Abstract This research work focuses on the reactivity, stability, and electronic interaction of pyridinium hydrogen nitrate (PHN)-based ionic liquids and the influence of methyl substituent on this class of ionic liquids: Ortho- (O-MPHN), meta- (M-MPHN), and para- (P-MPHN) substitution. Natural bond orbital (NBO) calculations were performed at the density functional theory (DFT) with Becke’s Lee Yang and Parr functional (B3LYP) methods and DFT/B3LYP/6-311++G(d,p) as basis set using GAUSSIAN 09W and GAUSSVIEW 6.0 software and the most important interaction between donor (Filled Lewis-type NBO’s) and the acceptor (vacant non-Lewis NBOs) were observed. From our natural bond orbital (NBO) result, it could be deduced that the higher the stabilization energy value, the greater the interaction between the donor and acceptor NBOs. The stability of the studied compounds is said to follow the order from O-MPHN > PHN > P-MPHN > M-MPHN based on the hyperconjugative interaction (stabilization energy) of the most significant interaction. The result of the highest occupied molecular orbital (HOMO), shows that PHN has the highest HOMO while the substituted derivatives have similar HOMO values between −7.70 and −7.98 eV thus PHN complex is the best electron donor while the substituted derivatives act as electron acceptors due to the presence of methyl group substituent which is observed to be electron deficient as a result of its withdrawal effect from the aromatic ring. Furthermore, the electron density, real space functions such as energy density and Laplacian of electron density at bond critical point (BCP) of the hydrogen bond interaction of the studied compounds were analyzed using Multifunctional Wavefunction analyzer software version 3.7 and it was observed that the hydrogen at position 6 and oxygen at position 11 (H6–O11) of M-methyl pyridinium nitrate with bond distance of 4.59 (Å) gave binding energy with the strongest electrostatic interaction between the cation and anion of the compounds under investigation. We also observed from our results that, substitution at the ortho position enhances the stability and strengthen the extent of charge transfer. This therefore implies that substitution at ortho position is more favorable for inter- and intramolecular interactions resulting to stabilization of the studied molecules.

6 Theoretical investigation of the stability, reactivity, and the interaction of methylsubstituted peridinium-based ionic liquids

2021 ◽  
pp. 103-118
Author(s):  
Emmanuel A. Bisong ◽  
Hitler Louis ◽  
Tomsmith O. Unimuke ◽  
Victoria M. Bassey ◽  
John A. Agwupuye ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Theoretical Investigation ◽  
The Stability

Understanding the stability of polypeptide membranes in ionic liquids: a theoretical molecular dynamics study

2019 ◽  
Vol 43 (25) ◽  
pp. 10151-10161 ◽  
Author(s):  
Eyber Domingos Alves ◽  
Leonardo Bruno Assis Oliveira ◽  
Guilherme Colherinhas
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Stability Analysis ◽  
Energy Storage ◽  
Ionic Solution ◽  
The Stability ◽  
New Applications

Stability analysis of polypeptide membranes in ionic liquids can make possible new applications of these membranes in energy storage and ionic solution separation.

Directed Evolution of a Formate Dehydrogenase for Increased Tolerance to Ionic Liquids Reveals a New Site for Increasing the Stability

ChemBioChem ◽  
2014 ◽  
Vol 15 (18) ◽  
pp. 2710-2718 ◽  
Author(s):  
Julie L. L. Carter ◽  
Mourad Bekhouche ◽  
Alexandre Noiriel ◽  
Loïc J. Blum ◽  
Bastien Doumèche
Keyword(s):  
Ionic Liquids ◽  
Directed Evolution ◽  
Formate Dehydrogenase ◽  
The Stability

A comparative study of the stability of stem bromelain based on the variation of anions of imidazolium-based ionic liquids

2017 ◽  
Vol 246 ◽  
pp. 178-186 ◽  
Author(s):  
Pannuru Kiran Kumar ◽  
Indrani Jha ◽  
Pannuru Venkatesu ◽  
Indra Bahadur ◽  
Eno E. Ebenso
Keyword(s):  
Ionic Liquids ◽  
Comparative Study ◽  
Stem Bromelain ◽  
The Stability

Rationale for the implementation of reference electrodes in ionic liquids

2016 ◽  
Vol 18 (11) ◽  
pp. 8148-8157 ◽  
Author(s):  
C. Bonnaud ◽  
I. Billard ◽  
N. Papaiconomou ◽  
E. Chainet ◽  
J. C. Leprêtre
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Media ◽  
Reference Electrodes ◽  
The Stability

A comparison between quasi-reference and reference electrodes was carried out in ionic liquid media by cyclic voltammetry. The stability and the reliability of these reference electrodes are discussed.

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