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Imidazole two-functionized room temperature inonic liquid and its preparing method

A room temperature ionic liquid, functionalized technology, applied in organic chemistry and other directions, can solve the problem that bifunctional room temperature ionic liquid has not been reported, and achieve the effects of good electrochemical properties, good thermal stability, and high specific heat capacity.

Inactive Publication Date: 2007-06-13
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The synthesis and application of bifunctional room temperature ionic liquids containing two functional groups on the imidazole ring have not been reported so far

Method used

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  • Imidazole two-functionized room temperature inonic liquid and its preparing method
  • Imidazole two-functionized room temperature inonic liquid and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Synthesis of N-propionitrile, N'-butyronitrile imidazolium chloride salt

[0027] Weigh 17.02 g (0.25 mol) of imidazole and dissolve it in anhydrous methanol. After stirring at room temperature to fully dissolve it, add 13.27 g of acrylonitrile (0.25 mol) to the above solution, and continue the reaction for 24 h under magnetic stirring at 70 ° C. Then 25.90 g of chloro-n-butyronitrile (0.25 mol) was added to the above solution, the temperature was raised to 80° C. to continue the reaction for 48 hours, the solvent methanol was removed by rotary evaporation, and after cooling to room temperature, 60 ml of ether was added to wash (three times), and the Separate the lower layer of the clear night from the funnel, and vacuumize it under magnetic stirring at 120°C to obtain a light yellow product N-propionitrile, N'-butyronitrile imidazolium chloride salt, which is stable to water and air, with a yield of 87.9%, and a melting point of It is -13.76°C, the density is 1.236g / ml...

Embodiment 2

[0029] Synthesis of N-propionitrile, N'-butyronitrile imidazolium tetrafluoroborate

[0030] Weigh 17.02 g (0.25 mol) of imidazole and dissolve it in anhydrous methanol. After stirring at room temperature to fully dissolve it, add 13.27 g of acrylonitrile (0.25 mol) to the above solution, and continue to react for 24 h under magnetic stirring at 70 ° C, then Add 25.90 g of chloro-n-butyronitrile (0.25 mol) to the above solution, raise the temperature to 80 ° C and continue the reaction for 48 hours, remove the solvent methanol by rotary evaporation, add 60 ml of diethyl ether to wash after cooling to room temperature (three times), use a separatory funnel Separate the lower clear layer and vacuumize it under magnetic stirring at 120°C to obtain a light yellow viscous liquid. Add 200ml of acetone to the ionic liquid prepared above, stir at room temperature to fully dissolve it, add 32.94g of sodium tetrafluoroborate (0.30mol) to the above solution, mechanically stir at room tem...

Embodiment 3

[0032] Synthesis of N-propionitrile, N'-butyronitrile imidazolium hexafluorophosphate

[0033]Weigh 17.02 g (0.25 mol) of imidazole and dissolve it in anhydrous methanol. After stirring at room temperature to fully dissolve it, add 13.27 g of acrylonitrile (0.25 mol) to the above solution, and continue to react for 24 h under magnetic stirring at 70 ° C, then Add 25.90 g of chloro-n-butyronitrile (0.25 mol) to the above solution, raise the temperature to 80 ° C and continue the reaction for 48 hours, remove the solvent methanol by rotary evaporation, add 60 ml of diethyl ether to wash after cooling to room temperature (three times), use a separatory funnel Separate the lower clear layer and vacuumize it under magnetic stirring at 120°C to obtain a light yellow viscous liquid. Add 200ml of deionized water to the ionic liquid prepared above, stir at room temperature to fully dissolve it, add 48.9g of ammonium hexafluorophosphate (0.30mol) to the above solution, and continue to r...

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Abstract

This invention relates to a room temperature ionic liquid with dual functional imidazolyl and its preparation. Through reaction of functional imidazole and alkylogen that contains functional group, this ionic liquid first produces dual functional ionic liquid of which anion is halogen anion, then through anion exchange, obtains dual functional ionic liquid that contains different anion. The ionic liquid of this invention has fine heat stability, is stable for water and air, possesses satisfactory electrochemistry character, can be used as electrolyte for electrochemistry research. In orthodox acid catalysis reaction, it not only can be used as catalyst, but also can be used as reaction medium. Meanwhile, it can be used as medium that can separate and extract.

Description

technical field [0001] The invention relates to an imidazole-based bifunctional room temperature ionic liquid and a preparation method thereof Background technique [0002] In recent years, room temperature ionic liquids have attracted extensive attention from academia and industry as a "green solvent" and reaction medium. Room temperature ionic liquids (RTILs) refer to salts that are liquid at room temperature or near room temperature, mainly composed of organic cations and inorganic and organic anions. As early as the early 1980s, the British BP company and the French IFP research institute had begun to explore the possibility of room temperature ionic liquids as solvents and catalysts. So far, room temperature ionic liquids have been used in catalytic reactions, organic synthesis, separation analysis, and solid lubrication. It has been widely used in many fields of electrochemical research. As a new class of green solvents, room temperature ionic liquids have the follow...

Claims

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Application Information

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IPC IPC(8): C07D233/56
Inventor 邓友全张庆华石峰杨静马健
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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