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Ultra-low temperature metal organic ligand doped amino acid composite material and preparation method thereof

A technology of metal-organic and composite materials, applied in the field of new functional materials, can solve problems such as poor selective adsorption capacity and difficult crystal size control, and achieve the effects of improving stability, improving selective adsorption capacity, and increasing specific surface area

Active Publication Date: 2018-04-17
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims at the problems of difficulty in crystal size control and poor selective adsorption capacity of existing MOFs materials, and provides an ultra-low temperature metal-organic ligand-doped amino acid composite material and a preparation method thereof

Method used

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  • Ultra-low temperature metal organic ligand doped amino acid composite material and preparation method thereof
  • Ultra-low temperature metal organic ligand doped amino acid composite material and preparation method thereof
  • Ultra-low temperature metal organic ligand doped amino acid composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0034] A method for preparing an ultra-low temperature metal organic framework material, comprising the steps of:

[0035] (1) Preparation of zirconium chloride solution: put 40mL N,N-dimethylformamide DMF solvent in a 100ml beaker, weigh 1.1660g (5mmol) zirconium chloride ZrCl 4 Slowly add to the flask, place on a magnetic stirrer and mechanically stir at a speed of 300rmp / min to fully dissolve the zirconium chloride, and record it as solution A;

[0036] (2) Preparation of terephthalic acid solution: weigh 0.8310g (5mmol) terephthalic acid H 2 Dissolve BDC in 30mL of N,N-dimethylformamide (DMF) solvent in a 50ml beaker, mechanically stir at a speed of 400rmp / min under the action of a magnetic stirrer for 10min to fully dissolve it, and record it as solution B;

[0037] (3) Preparation of metal organic framework materials: fully pre-freeze solutions A and B first, adjust the temperature to -35°C in an ultra-low temperature constant temperature tank, mechanically stir at a sp...

Embodiment 2

[0039] A method for preparing an ultra-low temperature metal-organic ligand-doped amino acid composite material, comprising the steps of:

[0040](1) Preparation of zirconium chloride solution: put 50mL N,N-dimethylformamide DMF solvent in a 100ml beaker, weigh 0.9328g (4mmol) zirconium chloride ZrCl 4 Slowly add to the flask, place it on a magnetic stirrer and mechanically stir at a speed of 350rmp / min to fully dissolve the zirconium chloride, and record it as solution A;

[0041] (2) Preparation of terephthalic acid solution: weigh 0.6648g (4mmol) terephthalic acid H 2 Dissolve BDC in 20mL N,N-dimethylformamide DMF solvent in a 50ml beaker, mechanically stir at a speed of 300rmp / min under the action of a magnetic stirrer for 8min to fully dissolve, and record it as solution B;

[0042] (3) Preparation of proline solution: Weigh 10mmol of proline and dissolve it in 20mL of N,N-dimethylformamide (DMF) solvent, slowly add 1.8mL of hydrochloric acid solution dropwise, and mecha...

Embodiment 3

[0045] A method for preparing an ultra-low temperature metal-organic ligand-doped amino acid composite material, comprising the steps of:

[0046] (1) Preparation of zirconium chloride solution: put 50mL N,N-dimethylformamide DMF solvent in a 100ml beaker, weigh 1.1660g (5mmol) zirconium chloride ZrCl 4 Slowly add to the flask, place it on a magnetic stirrer and mechanically stir at a speed of 400rmp / min to fully dissolve the zirconium chloride, and record it as solution A;

[0047] (2) Preparation of terephthalic acid solution: weigh 0.8310g (5mmol) terephthalic acid H 2 Dissolve BDC in 30mL N,N-dimethylformamide DMF solvent in a 50ml beaker, mechanically stir at a speed of 500rmp / min under the action of a magnetic stirrer for 10min to fully dissolve, and record it as solution B;

[0048] (3) Preparation of phenylalanine solution: Weigh 10mmol of phenylalanine and dissolve it in 20mL of N,N-dimethylformamide DMF solvent, slowly add 2.0mL of hydrochloric acid solution dropwis...

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Abstract

The invention discloses an ultra-low temperature metal organic ligand doped amino acid composite material and a preparation method thereof. The preparation method comprises the following steps: respectively dissolving zirconium chloride (ZrCl4) and terephthalic acid (H2BDC) into N,N-dimethylformamide (DMF), and mechanically stirring and dissolving amino acids into an amino acid salt in a hydrochloric acid solution; pre-freezing the previous three solutions, mixing ZrCl4 and the amino acid salt in an ultra-low temperature thermostatic bath to be mechanically stirred, dropwise adding the terephthalic acid solution into a mixed solution of ZrCl4 and the amino acid salt, continuing mechanically stirring, adding glacial acetic acid, and performing ultra-low temperature mechanical stirring, thereby obtaining the metal organic ligand doping amino acid composite material. By utilizing the ultra-low temperature process, the composite material disclosed by the invention is uniform in crystal form, the structural stability and specific surface area of the composite material are increased, and the acid-base property at the surface adsorption site of the composite material is changed. Comparedwith a composite material synthesized by other methods under equivalent conditions, the composite material synthesized by the method disclosed by the invention has excellent selective adsorption property on peptides.

Description

technical field [0001] The invention belongs to the field of novel functional materials, and in particular relates to a metal-organic framework composite material and a preparation method thereof. Background technique [0002] Efficient screening of highly active polypeptides in enzymatic hydrolysis products is a difficult point in the industrial application of functional foods. Traditional separation and purification methods include microfiltration, ultrafiltration, ion exchange, and gel chromatography. The long separation and purification time and large loss restrict the industrial application of high activity peptide screening. Metal-organic frameworks (Metal-Organic Frameworks), referred to as MOFs, are organic-inorganic hybrid materials with intramolecular pores formed by the self-assembly of organic ligands and metal ions or clusters through coordination bonds. Metal-organic frameworks (MOFs) are an emerging class of nanoporous materials with ultra-high specific surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C07K1/14
CPCB01J20/22B01J20/226B01J2220/4806B01J2220/4812C07K1/14
Inventor 赵钟兴刘龙崔馨方黄虹赵祯霞
Owner GUANGXI UNIV
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