1-Ethyl-3-methylimidazolium Chloride CAS 65039-09-0

1-Ethyl-3-methylimidazolium chloride (abbreviated as [EMIm]Cl or EMIC) is an organic salt belonging to the ionic liquid class. Molecular formula C6H11ClN2, CAS 65039-09-0. It is a light yellow to yellow transparent liquid with no fixed solid form. Ionic liquids are ionic compounds that are liquid at or near room temperature. It is an ionic compound, therefore it has good conductivity. This cation is composed of a five membered ring with two nitrogen atoms and three carbon atoms, namely an imidazole derivative, which replaces the ethyl and methyl groups at the two nitrogen atoms. It is an organic chloride salt and ionic liquid containing 1-ethyl-3-methylimidazolium. It is an organic chloride salt, with a cationic component of 1-ethyl-3-methylimidazole. Its conductivity at a certain concentration depends on its composition and concentration, and can reach a higher level. Has a slight irritating odor, and appropriate protective measures should be taken after prolonged contact. It has wide applications in many fields, such as chemical reaction media, electrochemical energy storage systems, extraction and separation, etc. It is an ionic compound, therefore it has good conductivity. Its conductivity at a certain concentration depends on its composition and concentration, and can reach a higher level. As an ionic liquid, it has important application value in electrochemical energy storage systems. It can be used as an electrolyte or additive in fields such as secondary batteries, capacitors, supercapacitors, and fuel cells to improve the performance and stability of energy storage equipment. It is an ionic liquid that can be used for cellulose processing.

Melting point 77-79 ° C (lit.), Density 1.435 g/cm3, Flash point 186 ° C, Storage condition store below +30 ° C, Morphology agglomerating crystal powder, Color pale yellow, Soluble in water, Sensitivity hygroscopic, BRN 5163190, Stable Very hygroscopic. Incompatible with strong oxidizing agents., InChIKeyBMQZYMYBQZGEEY-UHFFFAOYSA-M, Warning, Hazard description h315-h319-h413, Precautions p264-p280a-p321-p332+p313-p337+p313-p305+p351+p338, Dangerous goods sign Xi, N, t, Hazard category code 36/38-51/53-36/37/38-25, Safety instructions 26-57-45-37/39-29, Dangerous goods transport No. 2811, WGK Germany 2, F 3-10, TSCA Yes.

Because 1-Ethyl-3-methylimidazolium Chloride is widely used, understanding its synthesis methods and process conditions is of great significance for the study and application of this compound. At present, there are various reports on the synthesis methods of 1-ethyl-3-methylimidazole chloride, and one of the commonly used methods will be introduced.

The main steps of this method are as follows: synthesis of thiourea, reaction of thiourea with 1-ethyl-3-methylimidazole, and chlorination reaction.
1. Firstly, thiourea can be prepared by the reaction of ammonium sulfite and sodium carbonate. The reaction takes place at a certain temperature, with reactants mixed in a certain molar ratio and an appropriate amount of solvent added. After a period of reaction, the product can be obtained through filtration, crystallization, and other methods. The preparation conditions of thiourea need to be strictly controlled to ensure a high-purity product.
2. Next, the prepared thiourea will react with 1-ethyl-3-methylimidazole in an appropriate solvent. This reaction is usually carried out at a certain temperature and an appropriate amount of catalyst is added. The reaction time should be adjusted according to the experimental results to achieve the desired reaction effect. After the reaction, 1-ethyl-3-methylimidazole chloride can be obtained through filtration, purification, and other methods.
3. Finally, perform a chlorination reaction on the obtained product. The chlorination reaction is a crucial step in introducing chlorine atoms into the target compound. This reaction needs to be carried out at a certain temperature and pH value, with the addition of an appropriate amount of chlorinating agent. The reaction process requires strict control of temperature and reaction time to ensure high yield and purity of the product. After the reaction is completed, the product can be obtained as pure 1-ethyl-3-methylimidazole chloride through crystallization, washing, and other methods.

EMIC may be used in the preparation of aluminum chloride-EMIC, zinc chloride-EMIC and EMIC /tetrafluoroborate molten salts, which are useful in electrodeposition studies.

1-Ethyl-3-methylimidazolium chloride (EMImCl or EMIC), as an ionic liquid, has important applications in electrochemical energy storage systems. Ionic liquids, as electrolytes or additives, can provide good electrochemical stability, wide electrochemical windows, and excellent ion conductivity.
1. Secondary batteries: EMIC, as an ionic liquid electrolyte, has good application prospects in secondary batteries. It can be used in systems such as lithium-ion batteries (LIBs) and sodium ion batteries (SIBs). In LIBs, EMImCl as an electrolyte can provide good ion transport performance and stability, improve the energy density and cycle life of batteries. In SIBs, EMImCl can also serve as an electrolyte or additive, promoting the transport and storage of sodium ions, and improving the electrochemical performance of batteries.
2. Capacitors: EMICs can also be used as electrolytes in capacitors. A capacitor is an energy storage element that stores and releases energy through the accumulation and release of charges between electrodes. EMImCl as an electrolyte can increase the energy density and power density of capacitors, and improve their cycle life and stability.

3. Supercapacitors: Supercapacitors are energy storage components with high power density and long lifespan. EMIC can be combined with other electrolytes or additives for use in the energy storage mechanism of supercapacitors. It can improve the performance of supercapacitors, such as energy density, power density, cycle life, and stability.

4. Metal nanoparticles: By using EMImCl as the reaction medium, various metal nanoparticles such as gold, silver, platinum, etc. can be prepared. By controlling the reaction conditions, the size, morphology, and dispersion of metal nanoparticles can be regulated, enhancing their potential applications in catalysis, sensing, and optoelectronic devices.
5. Oxide nanomaterials: Various oxide nanomaterials, such as titanium dioxide, zinc oxide, iron oxide, etc., can be prepared through hydrolysis reactions involving EMImCl or reactions with metal salts. These nanomaterials can be used in fields such as photocatalysis, sensors, and electrochemical energy storage.
6. Inorganic non-metallic nanomaterials: By reacting with inorganic non-metallic precursors, inorganic non-metallic nanomaterials such as sulfides, nitrides, phosphides, etc. can be prepared in EMImCl. These materials have broad application prospects, such as in the fields of optoelectronic components, sensors, and catalysis.
7. Composite nanomaterials: By reacting EMImCl with other reactants, various composite nanomaterials can be prepared, such as metal oxide/graphene composites, metal/carbon nanotube composites, etc. These composite materials combine the advantages of multiple materials, have better comprehensive performance, and are suitable for various application fields.

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