1-ethyl-3-methylimidazolium tetrafluoroborate, with the CAS number 143314-16-3, is a well - known ionic liquid. It is a colorless to light - yellow liquid under normal conditions. The molecular formula of this product is C₆H₁₁BF₄N₂. Its molecular weight is approximately 197.97 g/mol. The product is typically supplied in a high - purity form, often with a purity of 98% or higher, ensuring its reliability and performance in various applications. It has good thermal stability and low volatility, which makes it an excellent candidate for many industrial and research settings.
1-ethyl-3-methylimidazolium tetrafluoroborate has a wide range of applications. In the field of electrochemistry, it is commonly used as an electrolyte in batteries and supercapacitors. Due to its high ionic conductivity and wide electrochemical window, it can improve the performance and efficiency of energy storage devices. In chemical synthesis, it serves as a reaction medium. It can dissolve a variety of organic and inorganic compounds, facilitating reactions such as catalytic reactions, organic synthesis, and polymerization. Moreover, it has applications in the separation and purification processes. It can be used in liquid - liquid extraction and chromatography as a stationary or mobile phase, helping to separate different components based on their solubility and interaction with the ionic liquid.
When using 1-ethyl-3-methylimidazolium tetrafluoroborate, it is important to handle it with appropriate safety precautions. Always wear appropriate personal protective equipment, such as gloves and goggles. In an electrochemical application, first, ensure that the electrodes are clean and dry. Then, carefully add the appropriate amount of the ionic liquid to the electrochemical cell. Stir gently to ensure uniform distribution of the electrolyte. In chemical synthesis, add the ionic liquid to the reaction vessel according to the experimental design. You may need to heat or cool the reaction mixture as required by the reaction conditions. When using it in separation processes, prepare the separation equipment first. Then, introduce the ionic liquid into the system as per the operating procedure of the specific separation method.
Case 1: Electrochemical Energy Storage
In a research project on lithium - ion batteries, 1-ethyl-3-methylimidazolium tetrafluoroborate was used as an electrolyte additive. The researchers found that by adding a small amount of this ionic liquid to the traditional electrolyte, the cycling stability of the battery was significantly improved. The battery showed a higher capacity retention rate after 1000 cycles compared to the battery without the additive. This was because the ionic liquid formed a stable solid - electrolyte interphase (SEI) layer on the electrode surface, which reduced the side reactions between the electrode and the electrolyte and improved the overall performance of the battery.
Case 2: Chemical Synthesis
In an organic synthesis experiment of synthesizing a new pharmaceutical intermediate, 1-ethyl-3-methylimidazolium tetrafluoroborate was used as a reaction medium. The reaction that was previously difficult to carry out in traditional organic solvents proceeded smoothly in the ionic liquid. The yield of the target product increased from 30% in a traditional solvent to over 70% in the ionic liquid. The unique properties of the ionic liquid, such as its high solubility and low viscosity, promoted the reaction kinetics and reduced the formation of by - products.
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