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Preparation method of Cu-Ag bimetal hydrogel and preparation method of crystal

A hydrogel, bimetallic technology, applied in the preparation of Cu-Ag bimetallic hydrogel and crystal preparation field, can solve the problems of strong hydrophilicity, unfavorable gel formation, insufficient coordination ability, etc. The effect of strong selective responsiveness and good responsiveness to multiple stimuli

Active Publication Date: 2019-02-22
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] If the supramolecular metal hydrogel is designed only based on phenylalanine, its coordination ability is not strong enough, and the desired effect may not be achieved; if the supramolecular metal hydrogel is designed only with a single pyridine as a ligand , because its hydrophilicity is too strong, it is not conducive to the formation of gel; and to prepare bimetallic hydrogel, the gel factor must have multiple coordination sites at the same time

Method used

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  • Preparation method of Cu-Ag bimetal hydrogel and preparation method of crystal
  • Preparation method of Cu-Ag bimetal hydrogel and preparation method of crystal
  • Preparation method of Cu-Ag bimetal hydrogel and preparation method of crystal

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preparation example Construction

[0033] The Cu-Ag bimetallic hydrogel provided by the application has the following differences from the gels in the prior art: the vast majority of the bimetallic gels reported in the literature are metal organic gels, and the bimetallic hydrogels involved in the present invention The gel is a metal hydrogel; most of the metal gels reported in the literature are formed by gelling factors themselves that can form gels and then doped with metal ions. The gelling factors involved in the present invention cannot form gels by themselves , is formed under the action of bimetallic ions; most of the bimetallic gels reported in the literature are gel factors that can form gels with individual metal ions, and then prepared into bimetallic gels. The bimetallic gel involved in the literature is that the gel factor and the two individual metal ions cannot form a gel, but can form a gel under the synergistic effect of the two gel factors; the bimetallic gel in the literature reports Most ar...

Embodiment 1

[0047] Weigh a certain amount of PF sample (such as formula (I 1 ) or formula (Ⅰ 2 ) shown in the ligand can be), add a small amount of sodium hydroxide to help dissolve, prepare 0.1M PF aqueous solution, the solution is colorless and transparent; weigh a certain amount of the following various salts Mg(Ac) 2 , Ca(Ac) 2 , Mn(Ac) 2 、Fe(Ac) 2 、Co(Ac) 2 、Ni(Ac) 2 , Zn(Ac) 2 、Cu(Ac) 2 and AgNO 3 , and prepare 0.1M aqueous solutions of the various metal salts mentioned above.

Embodiment 2

[0049] Pipette 100 μL of 0.1M PF aqueous solution and mix the above-mentioned ion solutions in a glass bottle according to the 2:1 molar equivalent of ligand and metal, adjust the pH of the mixed solution to 8-10, shake or sonicate, and observe whether there is metal Hydrogel formation.

[0050] It was found that the above mixture either formed a precipitate, or formed a viscous liquid, or a clear liquid, and could not form a metal hydrogel.

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Abstract

The invention provides a preparation method of Cu-Ag bimetal hydrogel and a preparation method of a crystal. The preparation method comprises the steps of mixing a water solution of a ligand represented by a formula (I1) or a formula (I2) (shown in the description), a water solution of copper salt and a water solution of silver salt, and adjusting the pH value of the obtained mixed solution, so asto obtain the Cu-Ag bimetal hydrogel. The bimetal hydrogel (PF-Cu-Ag) can be formed after the ligand, the silver salt and the copper salt are mixed; and the Cu-Ag bimetal hydrogel has good multiple stimulation responsiveness.

Description

technical field [0001] The invention relates to the technical field of hydrogels, in particular to a method for preparing Cu-Ag bimetallic hydrogel and a method for preparing crystals. Background technique [0002] Supramolecular hydrogel is a fibrous network structure formed by self-assembly of low-molecular-weight gelling factors through non-covalent bonds such as π-π stacking and hydrophobic bonds, thereby constraining water molecules. Supramolecular hydrogels have good biocompatibility and biodegradability, and are often used in biosensors, biomaterials, and scaffolds for tissue engineering. The introduction of metal ions into supramolecular hydrogel factors can change the phase state and properties of the system to form supramolecular metal hydrogels. Supramolecular metal hydrogels have multiple stimuli responsiveness (such as temperature, heat, pH, chemical substances, etc.) that supramolecular hydrogels possess. [0003] So far, a few gels containing two kinds of me...

Claims

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Application Information

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IPC IPC(8): C07D213/36
CPCC07B2200/13C07D213/36
Inventor 魏传晚王晓娟林英武
Owner NANHUA UNIV