scholarly journals Synthesis, characterization and electrochemistry of triethyl ammonium sulphate ionic liquid

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Jalal Khan ◽  
Sayyar Muhammad ◽  
Luqman Ali Shah ◽  
Javed Ali ◽  
Muhammad Ibrar ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Species ◽  
Spectroscopic Techniques ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
Oxide Layers ◽  
Onset Potential ◽  
H Nmr ◽  
Surface Electrochemistry ◽  
Ft Ir

AbstractProtic ionic liquids (PILs) being intrinsic proton conducting ionic species are considered as potential green electrolytes for study of electrocatalytic reactions and for fabrication of IL-based fuel cells (FCs) and batteries. We have prepared a sulfate anion based protic ionic liquid (PIL), triethylammonium sulfate (TEAS) through a reaction involving transfer of proton from H2SO4 to triethylamine (TEA). 1H NMR and FT-IR spectroscopic techniques were employed for confirmation of the synthesis of TEAS and water content of the PIL was quantified using coulometric Karl–Fischer (KF) titration. 1H NMR and FT-IR analysis confirm the synthesis of the PILs and KF-titration analysis shows that TEAS contains 1.43 w/w % water. Electrical conductivity of TEAS was determined at different temperatures showing that the PIL has excellent ionic conductivity that enhances with rise in temperature of the medium. The temperature dependence of the conductivity of the PIL follows the Arrhenius equation as the logσ versus 1/T plot is linear. The electrochemical windows (EWs) of the electrolyte were found using cyclic voltammetry at Pt and Au working electrodes and found to decrease with increase in temperature of the medium. The data revealed that the surfaces of the electrodes are covered with oxide layers due to oxidation of trace water (1.43 w/w %) present in the PIL. The oxide layers growth increase and their onset potential moves to less positive values as the temperature of the PILs is increased. The data was compared with the literature and would be helpful in understanding of the surface electrochemistry in this neoteric medium for being used as potential electrolyte in industry for various electrochemical applications.

Ultrasound-assisted aqua-mediated synthesis of multi-substituted tetrahydropyridine-3-carboxylates using N-carboxymethyl-3-pyridinium hydrogensulfate ([N-CH2CO2H-3-pic]+HSO4−) as a new efficient ionic liquid catalyst

2021 ◽  
Vol 3 (6) ◽  
Author(s):  
Kobra Nikoofar ◽  
Fatemeh Shahriyari
Keyword(s):  
Ionic Liquid ◽  
Reaction Times ◽  
Aromatic Aldehydes ◽  
Environmentally Benign ◽  
H Nmr ◽  
Sonic Waves ◽  
Ft Ir ◽  
High Yields ◽  
Work Up ◽  
C Nmr

AbstractA simple, straightforward, and ultrasound-promoted method for the preparation of some highly functionalized tetrahydropyridines reported via pseudo five-component reaction of (hetero)aromatic aldehydes, different anilines, and alkyl acetoacetates in the presence of [N-CH2CO2H-3-pic]+HSO4−, as a novel ionic liquid, in green aqueous medium. The IL was synthesized utilizing simple and easily-handled substrates and characterized by FT-IR, 1H NMR, 13C NMR, GC-MASS, FESEM, EDX, and TGA/DTG techniques. The procedure contains some highlighted aspects which are: (a) performing the MCR in the presence of aqua and sonic waves, as two main important and environmentally benign indexes in green and economic chemistry, (b) high yields of products within short reaction times, (c) convenient work-up procedure, (d) preparing the new IL via simple substrates and procedure.

scholarly journals Effect of Ionicity of Three Protic Ionic Liquids as Neat Lubricants and Lubricant Additives to a Biolubricant

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 713 ◽  
Author(s):  
Hong Guo ◽  
Angela Rina Adukure ◽  
Patricia Iglesias
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Friction And Wear ◽  
Cost Effective ◽  
Lubricant Additive ◽  
Lubricant Additives ◽  
Environmental Damage ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
Wear Process

Friction and wear of sliding surfaces are responsible for important energy losses and negative environmental effects. The use of environmentally friendly and cost-effective protic ionic liquids as neat lubricants and lubricant additives has the potential to increase the efficiency and durability of mechanical components without increasing the environmental damage. In this work, three halogen-free protic ionic liquids with increasing extent of ionicity, 2-hydroxyethylammonium 2-ethylhexanoate, 2-hydroxymethylammonium 2-ethylhexancate, and 2-hydroxydimethylammonium 2-ethylhexanoate, were synthesized and studied as neat lubricants and additives to a biodegradable oil in a steel–steel contact. The results show that the use of any protic ionic liquid as a neat lubricant or lubricant additive reduced friction and wear with respect to the biodegradable oil. The ionic liquid with the lowest ionicity reached the highest wear reduction. The one possessing the highest ionicity presented the poorest friction and wear behaviors as a neat lubricant, probably due to the more ionic nature of this liquid, which promoted tribocorrosion reactions on the steel surface. This ionic liquid performed better as an additive, showing that a small addition of this liquid in a biodegradable oil is enough to form protective layers on steel surfaces. However, it is not enough to accelerate the wear process with detrimental tribocorrosion reactions.

Preparation and Catalytic Performance of the Porous Polysulfone Microspheres Enabled by Immobilized Ionic Liquids for Esterification

2018 ◽  
Vol 1145 ◽  
pp. 90-94
Author(s):  
Yong Dong Zhao ◽  
Zhi Ping Zhao ◽  
Shuo Li ◽  
Peng Lu
Keyword(s):  
Ionic Liquid ◽  
Covalent Bond ◽  
Catalytic Performance ◽  
Inversion Method ◽  
Structure And Property ◽  
Porous Microspheres ◽  
H Nmr ◽  
Acidic Ionic Liquid ◽  
Ft Ir ◽  
Phase Inversion Method

Chloromethylated polysulfone (PSF-Cl) porous microspheres were prepared with non-solvent induced phase inversion method for the immobilization of acidic ionic liquid ([MIMBS][HSO4]). FT-IR, SEM, and 1H-NMR were used to characterize the structure and property of polysulfone porous microsphere supported ionic liquid (PSF-ILs). The results showed that acidic ionic liquid was supported onto the PSF-Cl porous microspheres by covalent bond. Furthermore, the catalyst exhibited a good catalytic activity with about 57% acetic acid conversion rate after 8h reaction. After the catalyst was reused for 7 times in the synthesis of ethyl acetate, the yield only decreased 6%.

scholarly journals Lyotropic liquid crystal phase behavior of a cationic amphiphile in aqueous and non-stoichiometric protic ionic liquid mixtures

Soft Matter ◽  
2020 ◽  
Vol 16 (41) ◽  
pp. 9456-9470
Author(s):  
Dilek Yalcin ◽  
Calum J. Drummond ◽  
Tamar L. Greaves
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Crystal ◽  
Self Assembly ◽  
Liquid Mixtures ◽  
Lyotropic Liquid Crystal ◽  
Liquid Crystal Phase ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
Cationic Amphiphile

Protic ionic liquids (PILs) are the largest and most tailorable known class of non-aqueous solvents which possess the ability to support amphiphile self-assembly.

Design, preparation and characterization of a new ionic liquid, 1,3-disulfonic acid benzimidazolium chloride, as an efficient and recyclable catalyst for the synthesis of tetrahydropyridine under solvent-free conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (83) ◽  
pp. 67405-67411 ◽  
Author(s):  
Mohsen Abbasi
Keyword(s):  
Ionic Liquid ◽  
Mass Spectra ◽  
Recyclable Catalyst ◽  
Solvent Free ◽  
Disulfonic Acid ◽  
H Nmr ◽  
Solvent Free Conditions ◽  
Ft Ir ◽  
C Nmr

In the present work, 1,3-disulfonic acid benzimidazolium chloride as a new ionic liquid, is synthesized, and characterized by studying its FT-IR, 1H NMR, 13C NMR as well as mass spectra.

Role of Cation in Enhancing the Conversion of the Alzheimer’s Peptide into Amyloid Fibrils Using Protic Ionic Liquids

2012 ◽  
Vol 65 (11) ◽  
pp. 1502 ◽  
Author(s):  
Natalie Debeljuh ◽  
Swapna Varghese ◽  
Colin J. Barrow ◽  
Nolene Byrne
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Primary Amine ◽  
Amyloid Fibrils ◽  
Tertiary Amines ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
The Difference ◽  
The Impact

We report on the impact of changes in the protic ionic liquid (pIL) cation on the fibrilisation kinetics and the conversion of the Aβ 16–22 from monomers to amyloid fibrils. When we compare the use of primary, secondary, and tertiary amines we find that the primary amine results in the greatest conversion into amyloid fibrils. We show that the pIL is directly interacting with the peptide and this likely drives the difference in conversion and kinetics observed.

scholarly journals The beneficial effect of protic ionic liquids on the lithium environment in electrolytes for battery applications

2014 ◽  
Vol 2 (22) ◽  
pp. 8258-8265 ◽  
Author(s):  
Thomas Vogl ◽  
Sebastian Menne ◽  
Ruben-Simon Kühnel ◽  
Andrea Balducci
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Beneficial Effect ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid

Protic ionic liquid-based electrolytes are promising electrolytes for lithium-ion batteries.

Ionothermal synthesis of crystalline metal phosphites using multifunctional protic ionic liquids

CrystEngComm ◽  
2020 ◽  
Vol 22 (37) ◽  
pp. 6096-6100
Author(s):  
Ting Li ◽  
Yumei Mao ◽  
Yue Qi ◽  
Hongmei Zeng ◽  
Guohong Zou ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Mixed Valence ◽  
Reducing Agent ◽  
Protic Ionic Liquids ◽  
Protic Ionic Liquid ◽  
Structure Directing Agent ◽  
Ionothermal Synthesis ◽  
Phosphorus Source ◽  
Crystalline Metal

A mixed-valence iron phosphite was prepared under ionothermal conditions using a protic ionic liquid as a solvent, a structure-directing agent, a phosphorus source, and a reducing agent.

Efficiency of Salen Functionalized Ionic Liquids and their Application towards Biological Activity

2020 ◽  
Vol 13 (4) ◽  
pp. 5020-5027
Author(s):  
C. Isac Sobanara ◽  
M. Antilin Princela
Keyword(s):  
Ionic Liquid ◽  
Biological Activity ◽  
Metal Ions ◽  
Morphological Changes ◽  
Vital Role ◽  
Spectroscopic Techniques ◽  
Salen Complex ◽  
Salen Complexes ◽  
Ft Ir ◽  
Ancient Times

Schiff bases were often used as chelating ligands for the stabilization of metal ions with various oxidation states. It is called privileged ligands, due to their own peculiar capacity to make a four and six coordinated salen complex to stabilize the metal ions. On the other hand, Ionic liquid (IL) also plays a key material in engineering and scientific fields. Due to their own physiochemical properties and widespread applications in different areas of research. It has been recently found that, the suitable choice and appropriate size of cation and anion can alter the geometry of ILs and it directly influenced the biological activity of ILs. Herein ionic liquid tagged new salen complexes of first row transition metals such as Fe, Co, Ni, Cu and Zn have been synthesized successfully and characterized. The structure of synthesized salen complexes were studied by UV, FT-IR, NMR and Mass spectroscopic techniques. Metal complexes play a vital role in drug discovery since ancient times. Especially, these complexes can interact with the cell membrane and make the morphological changes in the affected site. Moreover, the efficiency of salen complexes were assessed by antimicrobial and antifungal studies. Among all the IL tagged salen complexes the Ionic liquid tagged cobalt salen complexes was very effective against the tested microorganisms.

Synthesis and Characterization of Imidazo[1,2-a]Pyrimidine

2015 ◽  
Vol 52 ◽  
pp. 1-4
Author(s):  
A.M. Shah ◽  
A.J. Rojivadiya
Keyword(s):  
Mass Spectroscopy ◽  
Synthesis And Characterization ◽  
Spectroscopic Techniques ◽  
One Pot ◽  
H Nmr ◽  
Ft Ir ◽  
C Nmr

An efficient protocol for the synthesis of imidazo [1,2-a] pyrimidine was developed by using three component one-pot Biginelli synthesis. The synthesized compounds were characterized by spectroscopic techniques like FT-IR, 1H NMR, 13C NMR, and mass spectroscopy.

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