Ionic Liquids Based on Imidazolium and Pyrrolidinium Salts of the Tricyanomethanide Anion

2004 ◽  
Vol 57 (2) ◽  
pp. 121 ◽  
Author(s):  
Stewart A. Forsyth ◽  
Stuart R. Batten ◽  
Qing Dai ◽  
Douglas R. MacFarlane
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Thermal Analyses ◽  
Melting Points ◽  
Ambient Temperatures ◽  
Electrochemical Window ◽  
Potential Use

A novel series of tricyanomethanide ionic liquids have been prepared and characterized for potential use as ionic liquid solvents. Full thermal analyses of all salts at ambient and sub-ambient temperatures are reported (melting points –17° to 160°C). The thermal stability and decomposition temperatures are also presented (Tdecomp ≈ 300°C). An electrochemical window of ~3 V has been established and the conductivity measured over a range of temperatures (20 mS cm–1 at 25°C).

Novel Ionic Liquid Lubricants for Aerospace and MEMS

2005 ◽  
Author(s):  
Barbara J. Kinzig ◽  
Paul Sutor ◽  
Gregory W. Sawyer ◽  
Alison Rennie ◽  
Pamela Dickrell ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Molten Salts ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Melting Points

Room temperature ionic liquids (RTILs) are molten salts with melting points at or below room temperature. RTILs have recently been recognized as novel lubricants. Only a few have previously been evaluated.

Study on the Performance of the Ionic Liquids [Emim]CH3SO3 and [Emim]PF6 to Prepare the Biosensor of the Detection of Heavy Metals in Seawater

2017 ◽  
Vol 20 (1) ◽  
pp. 013-020 ◽  
Author(s):  
Xuhui Ma ◽  
Shipeng Zhao ◽  
Shuping Zhang
Keyword(s):  
Heavy Metal ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Electrochemical Sensors ◽  
Low Cost ◽  
Sensor Applications ◽  
Electrochemical Window ◽  
Significant Difference

Electrochemical sensors can detect the heavy metal ions in seawater quickly, conveniently and accurately with the advantages such as the fast detection speed, the simple operability and the low cost. The ionic liquid [Emim]CH3SO3 showed excellent electrochemical performance and could meet the initial application requirements as electrochemical sensors. The characters of the ionic liquids [Emim]CH3SO3 and [Emim]PF6 which include IR, LC-MS, conductivity, electrochemical window and viscosity were detected. The influ-ence of trace impurity on the conductivity of the ionic liquids was investigated. Results suggested that the conductivity of the ionic liquids increased with the concentration of the added organic solvents. In addition, though the conductivity of the ionic liquids increased with temperature, there is no significant difference in the influence of the same impurity at varying temperatures. Muti Walls Carbon Nanotubes (MWCNTs) are appropriate materials which are commonly used materials for electrochemical sensor applications. The effect of theImidaz-olium-based ionic liquids on the performance of the conductivity of the MWCNTs was studied. It was found that Ionic liquid is an excellent extraction agent for metal ions and its presence in the sensor system improves significantly the detection of heavy metal ions.

scholarly journals A NEW CLASS OF IONIC SOLVENTS, ELECTROLYTES AND ENGINEERING FLUIDS BASED ON 1,3-ALKYLMETHYL-1,2,3-BENZOTRIAZOLIUM SALTS

2010 ◽  
Vol 6 (2) ◽  
pp. 111-116 ◽  
Author(s):  
Ahmad Mudzakir
Keyword(s):  
Ionic Liquids ◽  
Single Crystal ◽  
Thermal Analyses ◽  
Spectroscopic Studies ◽  
Electrochemical Analysis ◽  
Electrochemical Characteristics ◽  
Melting Points ◽  
X Ray ◽  
Good Thermal Stability ◽  
New Class

A new series of ionic liquids based on 1,3-alkylmethyl-1,2,3-benzotriazolium cation has been prepared. The spectroscopic, physical and electrochemical characteristics of this family of salts have been investigated with respect to potential usage as ionic solvents, electrolytes and engineering fluids. Incorporation of diverse anions including weak coordinating anion and pseudohalide with this benzotriazolium cation produces ionic liquids with advantageously low melting points and good thermal stability. Thermal analyses of these very stable salts included the determination of melting points (-65 to 164 oC) and decomposition temperatures (up to 291 oC). The electrochemical windows of representative benzotriazolium species has been investigated by cyclic voltammetry and determined to be ~ 3 V. The X-ray single crystal and spectroscopic studies revealed that weak hydrogen-bonding interactions between the benzotriazolium ring protons and the anions are present both in the solid state as well as in solution.   Keywords: ionic liquids, X-ray single crystal, thermal analysis, electrochemical analysis, benzotriazolium salt

scholarly journals Properties of Dicationic Disiloxane Ionic Liquids

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2949
Author(s):  
Vladimir G. Krasovskiy ◽  
Gennady I. Kapustin ◽  
Olga B. Gorbatsevich ◽  
Lev M. Glukhov ◽  
Elena A. Chernikova ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Hydrolytic Stability ◽  
Melting Points ◽  
Imidazolium Cations ◽  
Dicationic Ionic Liquids

A number of dicationic ionic liquids with a disiloxane linker between imidazolium cations and bis(trifluoromethylsulfonyl)imide anion were synthesized and characterized. Melting points, viscosity, and volatility in a vacuum were measured; the thermal and hydrolytic stability of ionic liquids were also studied. The dependence of the properties on the structure of substituents in the cation of the ionic liquid was demonstrated.

scholarly journals Absorption of Sulfur Dioxide by Tetraglyme–Sodium Salt Ionic Liquid

Molecules ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 436 ◽  
Author(s):  
Qiang Xu ◽  
Wei Jiang ◽  
Jianbai Xiao ◽  
Xionghui Wei
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Sulfur Dioxide ◽  
Sodium Salt ◽  
Lithium Salt ◽  
Absorption Capacity ◽  
Excellent Thermal Stability ◽  
Physical Absorption ◽  
So2 Absorption

A series of tetraglyme–sodium salt ionic liquids have been prepared and found to be promising solvents to absorb SO2. The experiments here show that [Na–tetraglyme][SCN] ionic liquid has excellent thermal stability and a 30% increase in SO2 absorption capacity compared to other sodium salt ionic liquids and the previously studied lithium salt ionic liquids in terms of molar absorption capacity. The interaction between SO2 and the ionic liquid was concluded to be physical absorption by IR and NMR.

Pyridinium-clubbed dicationic ionic liquid electrolytes for efficient next-generation photo harvesting

2018 ◽  
Vol 42 (9) ◽  
pp. 6990-6996 ◽  
Author(s):  
Abhishek Dhar ◽  
Nadavala Siva Kumar ◽  
Mohammad Asif ◽  
Rohit L. Vekariya
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ionic Conductivity ◽  
Next Generation ◽  
Photovoltaic Devices ◽  
Excellent Thermal Stability ◽  
Liquid Electrolytes ◽  
Dicationic Ionic Liquid ◽  
Dicationic Ionic Liquids

A new series of pyridinium based dicationic ionic liquids was designed and synthesized. The synthesized ionic liquids have excellent thermal stability and good ionic conductivity. They can be used as electrolytes in photovoltaic devices.

An Efficient, Eco-Friendly, One-Pot Protocol for the Synthesis of 2-Oxazolines Promoted by Ionic Liquid/Indium Chloride

2006 ◽  
Vol 59 (7) ◽  
pp. 463 ◽  
Author(s):  
R. Kamakshi ◽  
Boreddy S. R. Reddy
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Lewis Acid ◽  
Acid Catalysts ◽  
Lewis Acid Catalysts ◽  
One Pot ◽  
Indium Chloride ◽  
Ambient Temperatures ◽  
Alkyl Chains ◽  
Liquid Indium

2-Oxazolines have been synthesized using a solventless ionic liquid melt in good yields at ambient temperatures. The efficiency of various Lewis acid catalysts for the same reaction has been compared. The effectiveness of different alkyl chains in the ionic liquids for the synthesis of oxazolines has been studied and a butylmethylimidazolinium chloride/indium chloride melt has been found to be the best media for promoting the reaction.

Phase Behaviour and FTIR Spectra of Ionic Liquids: The Mixtures of 1-Butyl-1-methylpyrrolidinium Chloride and TaCl5

2008 ◽  
Vol 63 (1-2) ◽  
pp. 66-72 ◽  
Author(s):  
Olga B Babushkina
Keyword(s):  
Thermal Stability ◽  
Ionic Liquids ◽  
Ftir Spectra ◽  
Phase Behaviour ◽  
Molar Ratio ◽  
Ionic Interactions ◽  
Melting Points ◽  
Scanning Calorimetry ◽  
Molar Ratios ◽  
Insight Into

A series of ionic liquids consisting of 1-butyl-1-methylpyrrolidinium chloride (Pyr14Cl) and TaCl5 at molar ratios of Pyr14Cl in the range of 0.85 - 0.20 was synthesized. They exhibit potential application as electrolytes for the electrochemical deposition of tantalum. The thermal behaviour of the Pyr14Cl-TaCl5 mixtures was investigated, using differential scanning calorimetry (DSC) to estimate the range of thermal stability and to determine the optimal compositions for electrochemical trials. The Pyr14Cl-TaCl5 mixtures formed stoichiometric 3 : 2 and 2 : 3 crystalline phases with melting points of 70 °C and 130 °C, respectively, characterized by entropies of fusion of 13.6 JK−1 mol−1 and 10.1 JK−1 mol−1. The mixtures with molar fractions of Pyr14Cl equal to 0.60 and 0.40 were clear and transparent liquids and had the lowest viscosity; they were the most suitable for electrochemical applications. FTIR spectra of the Pyr14Cl-TaCl5 mixtures allowed to get insight into inter-ionic interactions and the nature of formation of these ionic liquids as a function of the molar ratio of the components.

scholarly journals Two-Dimensional FTIR as a Tool to Study the Chemical Interactions within Cellulose-Ionic Liquid Solutions

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Kalyani Kathirgamanathan ◽  
Warren J. Grigsby ◽  
Jafar Al-Hakkak ◽  
Neil R. Edmonds
Keyword(s):  
Ionic Liquid ◽  
Hydrogen Bonding ◽  
Ionic Liquids ◽  
Network Structure ◽  
Solution Viscosity ◽  
Two Dimensional ◽  
Ambient Temperatures ◽  
Heating And Cooling ◽  
Solution Rheology ◽  
Higher Temperature

In this study two-dimensional FTIR analysis was applied to understand the temperature effects on processing cellulose solutions in imidazolium-based ionic liquids. Analysis of the imidazolium ionνC2–H peak revealed hydrogen bonding within cellulose solutions to be dynamic on heating and cooling. The extent of hydrogen bonding was stronger on heating, consistent with greater ion mobility at higher temperature when the ionic liquid network structure is broken. At ambient temperatures a blue shiftedνC2–H peak was indicative of greater cation-anion interactions, consistent with the ionic liquid network structure. Both cellulose and water further impact the extent of hydrogen bonding in these solutions. The FTIR spectral changes appeared gradual with temperature and contrast shear induced rheology changes which were observed on heating above 70°C and cooling below 40°C. The influence of cellulose on solution viscosity was not distinguished on initial heating as the ionic liquid network structure dominates rheology behaviour. On cooling, the quantity of cellulose has a greater influence on solution rheology. Outcomes suggest processing cellulose in ionic liquids above 40°C and to reduce the impacts of cation-anion effects and enhance solubilisation, processing should be done at 70°C.

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