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A zinc complex based on 4-(2-methylimidazole) benzoic acid and its application

A technology of methylimidazole and zinc complexes, applied in zinc organic compounds, 2/12 group organic compounds without C-metal bonds, and other chemical processes, can solve the problems of storage research lag and achieve reproducibility Good, simple process, high yield effect

Active Publication Date: 2020-09-25
SHAANXI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the construction types of the above metal-organic framework compounds, the research on the storage of coordination polymers and related energy materials based on carboxyl groups, nitrogen-containing heterocyclic multifunctional organic ligands and central metal ions has lagged behind.

Method used

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  • A zinc complex based on 4-(2-methylimidazole) benzoic acid and its application
  • A zinc complex based on 4-(2-methylimidazole) benzoic acid and its application
  • A zinc complex based on 4-(2-methylimidazole) benzoic acid and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Dissolve 4-(2-methylimidazole)benzoic acid (20.2mg, 0.1mmol), potassium hydroxide (5.6mg, 0.1mmol) and zinc nitrate (23.6mg, 0.1mmol) in water, and seal it in a reaction kettle, Heat to 110°C at a rate of 10°C per hour, maintain this temperature for 3 days, then cool down to room temperature naturally, wash with DMF, and filter through filter paper to obtain colorless blocky crystals. The obtained crystal products are placed in an oven at 80°C The temperature was kept at medium temperature for 3 hours, and the yield of the target product was about 65%. The main infrared absorption peaks are 3435(m), 3121(m), 1618(s), 1528(m), 1373(s), 1122(m), 1072(m), 845(m), 774(m) .

[0034] The zinc complex regulated by the mixed organic ligand prepared in Example 1 was further characterized, and the process is as follows:

[0035] (1) Determination of the crystal structure of the complex

[0036] Under a microscope, a crystal with a suitable size of 0.32mm×0.30mm×0.28mm was sele...

Embodiment 2

[0054] 4-(2-Methylimidazole) benzoic acid (40.4mg, 0.2mmol), potassium hydroxide (11.2mg, 0.2mmol) and zinc nitrate (35.2mg, 0.15mmol) were dissolved in 10mL DMF solution, and the above mixture The solution was put into a reaction kettle lined with polytetrafluoroethylene, heated to 120°C at a rate of 6°C per hour, maintained at this temperature for 3 days, and then cooled to room temperature naturally to obtain colorless blocky crystals. The crystals were washed with DMF, and the target crystal product was obtained by filtration under reduced pressure, and the target product was placed in an oven at 80° C. for 3 hours at a constant temperature. Finally, the yield of the target product was about 75%.

Embodiment 3

[0056] 4-(2-Methylimidazole) benzoic acid (20.2mg, 0.1mmol), sodium hydroxide (11.2mg, 0.2mmol) and zinc nitrate (35.2mg, 0.15mmol) were dissolved in 10mL DMF solution, and the above mixture Put the solution into a reaction kettle lined with polytetrafluoroethylene, heat it to 130°C at a rate of 10°C per hour, maintain this temperature for 3 days, and then cool it down to room temperature naturally to obtain colorless blocky crystals. Rinse the crystals, obtain the target crystal product by filtration under reduced pressure, and place the target product in an oven at 80° C. for 3 hours at a constant temperature. Finally, the target product yield was about 67%.

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Abstract

The invention belongs to the technical field of organic and inorganic synthesis, particularly discloses a zinc complex constructed based on of 4-(2-methylimidazole) benzoic acid and application thereof. The molecular formula of a crystal is [Zn(MIBA)2]n, wherein HMIBA is negative one valent ligand 4-(2-methylimidazole) benzoic acid shown as a formula 1, and belongs to an orthorhombic crystal system; a P4nc space group, cell parameters a is equal to 14.1883(6) A-ring, b is equal to 14.1868(6) A-ring, c is equal to 13.5156(8) A-ring, and beta is equal to 90 degrees. A crystal material of the complex is synthesized by adopting a solvent thermal reaction, a zinc ion is taken as a node of four connections, and a three-dimensional fourfold interlaced microporous structure is formed by bridging ligand 4-(2-methylimidazole) benzoic acid. The crystal material of the complex has the advantages of adsorption performance and fluorescence performance. The microporous crystal material provided by the invention has high fluorescence performance and adsorption performance, and is important to the fields of petrochemical engineering, fine chemical engineering and the like. The formula 1 is shown in the description.

Description

technical field [0001] The invention belongs to the technical field of organic and inorganic synthesis, in particular to a zinc complex based on 4-(2-methylimidazole) benzoic acid and an application thereof. Background technique [0002] carbon dioxide (CO 2 ) as the main factor leading to the greenhouse effect, the research on the storage, separation and transformation of its gas has received widespread attention. In recent years, a new type of porous material-metal-organic framework compound has the characteristics of large specific surface area, large porosity, diverse structure and composition, and good thermal stability. 2 Potential applications in gas storage and separation have become a research hotspot in the field of gas molecule adsorption and storage materials. [0003] At present, the research work on the gas adsorption of metal-organic frameworks is mainly focused on rigid polycarboxylic aromatic acids and central metal ions, bridging nitrogen-containing heter...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D233/60C07F3/06C09K11/06B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2253/20B01D2257/504B01J20/223C07B2200/13C07D233/60C07F3/003C09K11/06C09K2211/1007C09K2211/1044C09K2211/188Y02C20/40
Inventor 卢久富
Owner SHAANXI UNIV OF TECH
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