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Vinyl alkyl imidazole tetrathiocyanate cobalt (II) magnetic ionic liquids and synthetic methods thereof

A vinyl alkylimidazole and magnetic ionic liquid technology, applied in the field of structural magnetic functional materials and their preparation, can solve the problems of poor magnetic adjustability, single structure, weak magnetism, etc., achieve high thermal stability, and expand the effect of types

Inactive Publication Date: 2013-02-27
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In 2007, Yoshida et al. synthesized pure organic magnetic ionic liquids containing organic radicals for the first time [C n mim][TEMPO-OSO 3 ], but its magnetic properties are weak
At present, magnetic ionic liquids have disadvantages such as single structure, weak magnetism, and poor magnetic adjustability.

Method used

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  • Vinyl alkyl imidazole tetrathiocyanate cobalt (II) magnetic ionic liquids and synthetic methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Embodiment 1: 0.140mol 1-vinylimidazole and 0.168mol methyl bromide (CH 3 Br) into a 100mL microwave reactor. Put the reaction kettle into the Trinity Synthetic Extraction Reactor, take it out after 40s of microwave radiation with 187W, place it for 2h (every 25min slight vibration once), repeat "Use 187W microwave radiation for 40s, take it out, place it for 2h (during it every 25min) 25min slight shock once)" 8 times. The material in the reaction kettle was transferred to a round bottom flask, and washed 5 times with 1.5 times the volume of ethyl acetate to obtain a crude product. The obtained crude product was distilled under reduced pressure until it was light yellow and viscous without bubbles, and was taken out. Vacuum drying 48h again, obtain brominated 1-vinyl-3-methylimidazole ([VC 1 IM] Br) ionic liquid.

[0034] 0.0353mol CoCl 2 ·6H 2 O and 0.124mol KSCN were added to a round bottom flask, and acetone was added under slow stirring until the two were dis...

Embodiment 2

[0036] Embodiment 2: 0.120mol 1-vinylimidazole and 0.120mol methyl bromide (CH 3 Br) into a 100mL microwave reactor. Put the reaction kettle into the Trinity Synthetic Extraction Reactor, irradiate it with 200W microwave for 35s, take it out, and place it for 2h (during which it shakes slightly every 20min). Repeat the operation of "radiate with 200W microwave for 35s, take it out, and place it for 2h (every 20min with slight vibration)" for 7 times. The material in the reaction kettle was transferred to a round bottom flask, and washed 5 times with 1.3 times the volume of ethyl acetate to obtain a crude product. The obtained crude product was distilled under reduced pressure until it was light yellow and viscous without bubbles, and was taken out. Vacuum drying 48h again, obtain brominated 1-vinyl-3-methylimidazole ([VC 1 IM] Br) ionic liquid.

[0037] Take 0.0135mol CoCl 2 ·6H 2 O, 0.0540mol KSCN and the obtained [VC 1 IM] Add 0.0270mol of Br ionic liquid into a round...

Embodiment 3

[0038] Embodiment 3: 0.175mol 1-vinylimidazole and 0.175mol bromoethane (C 2 h 5 Br) into a 100mL microwave reactor. Put the reaction kettle into the Trinity Synthetic Extraction Reactor, irradiate it with 190W microwave for 40s, take it out, and let it stand for 2h (every 25min, shake slightly once). Repeat "take out after irradiating with 190W microwave for 40s, and place it for 2h (during which, shake slightly once every 25min)" 9 times. The material in the reaction kettle was transferred to a round bottom flask, and washed 4 times with 1.5 times the volume of ethyl acetate to obtain a crude product. The obtained crude product was distilled under reduced pressure until it was light yellow and viscous without bubbles, and was taken out. Vacuum drying 48h again, obtain brominated 1-vinyl-3-ethylimidazole ([VC 2 IM] Br) ionic liquid.

[0039] 0.0353mol CoCl 2 ·6H 2 O and 0.142mol KSCN were added to the round bottom flask, and acetone was added under slow stirring until ...

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Abstract

The invention relates to the field of structural functional materials and preparation technology thereof, and specifically relates to vinyl alkyl imidazole tetrathiocyanate cobalt (II) magnetic ionic liquids and synthetic methods thereof. The technical characteristics lie in that the vinyl alkyl imidazole tetrathiocyanate cobalt (II) magnetic ionic liquids with different cation structures are synthesized by employing 1-vinyl imidazole, a alkyl bromide, cobalt chloride hexahydrate and potassium thiocyanate as raw materials and adopting two methods. Compared with a general magnetic ionic liquid, the vinyl alkyl imidazole tetrathiocyanate cobalt (II) magnetic ionic liquids have the characteristics of controllable magnetism, high heat stability and the like. Designability of the magnetism of the magnetic ionic liquids is realized. Regulation performance of the magnetism of the magnetic ionic liquids is realized by changing the length of the alkyl chain on the vinyl imidazole cation. Also, the synthetic methods of the vinyl alkyl imidazole tetrathiocyanate cobalt (II) magnetic ionic liquids are provided.

Description

technical field [0001] The invention belongs to the technical field of structural magnetic functional materials and their preparation, and in particular relates to a vinyl alkylimidazolium tetrathiocyanate cobalt (II) type magnetic ionic liquid and a synthesis method thereof. Background technique [0002] Room temperature ionic liquids are composed of organic cations and inorganic / organic anions, and are liquid salts at or near room temperature. Due to their structural designability, more and more functionalized ionic liquids have been reported in large numbers. [0003] Among them, the magnetic ionic liquid is a functionalized ionic liquid with magnetic properties. In addition to its good solubility, wide liquid range, non-volatility, good electrical conductivity, wide electrochemical window, good thermal stability, In addition to the characteristics of large heat capacity, it can also produce a certain response to magnets and external magnetic fields, and the existence of...

Claims

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Application Information

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IPC IPC(8): C07D233/58H01F1/44
Inventor 管萍胡小玲唐一梅李晓倩
Owner NORTHWESTERN POLYTECHNICAL UNIV
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