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Functional ligand and preparation method thereof

A technology of functions and ligands, which is applied in the field of preparation of organometallic coordination polymers, organic ligands, and functional ligands supported by gemini quaternary ammonium salts. It can solve the problems affecting the slow process of organic ligands and metal ion self-assembly, Difficult to cultivate coordination polymers, poor water solubility of aromatic acid ligands, etc., to achieve the effect of abundant raw materials, novel structures, and simple methods

Inactive Publication Date: 2013-07-10
HUAIHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is well known to professionals that the existing aromatic acid ligands have poor water solubility, and the preparation of coordination polymers is mostly carried out in organic solvents, and the required reaction temperature is also high, which affects the slow process of self-assembly between organic ligands and metal ions. Difficult to grow coordination polymer huge crystal material or membrane material

Method used

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  • Functional ligand and preparation method thereof
  • Functional ligand and preparation method thereof
  • Functional ligand and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Example 1 Gemini quaternary ammonium salt supported bis (salicylaldehyde amino acid) functional ligand (Ia-1) Preparation Step 1 Preparation of double salicylaldehyde modified gemini quaternary ammonium salt IIIa-1

[0033]

[0034]In a four-neck flask equipped with a stirrer, weigh 32 grams of 4,4'-bipyridine and dissolve it in 80 ml of acetonitrile to obtain an acetonitrile solution of 4,4'-bipyridine, and then weigh 5-chloro 70 grams of methyl salicylaldehyde were dissolved in 100 milliliters of acetonitrile to prepare an acetonitrile solution of 5-chloromethyl salicylaldehyde. Control the temperature of the acetonitrile solution of 5-chloromethyl salicylaldehyde between 8 and 15°C, slowly add the acetonitrile solution of 4,4'-bipyridine into the 5-chloromethyl salicylaldehyde under stirring In the acetonitrile solution, after reacting for 4 hours, raise the temperature of the reaction material to 80-85°C, then stir the reaction for 10 hours, lower the temperature...

Embodiment 2

[0039] Example 2 Preparation of Gemini quaternary ammonium salt supported bis(salicylaldehyde amino acid) functional ligand (Ia-2)

[0040]

[0041] According to the method and operation steps of Example 1, the anthranilic acid in Step 3 of Example 1 was replaced with glycine to obtain light yellow Ia-2.

[0042] Dissolve the light yellow Ia-2 in deionized water, adjust the pH to 8.5 with sodium carbonate aqueous solution, slowly add copper chloride aqueous solution dropwise, the color of the solution gradually turns dark blue, and blue crystals precipitate out after a few days.

Embodiment 3

[0043] Example 3 Preparation of Gemini quaternary ammonium salt supported bis(salicylaldehyde amino acid) functional ligand (IIa-1)

[0044]

[0045] According to the method and operation steps of Example 1, N, N, N', N'-tetramethylethylenediamine in Step 3 of Example 1 was replaced with 1,4-diimidazolidine to obtain orange-red IIa -1.

[0046] Dissolve orange-red IIa-1 in deionized water, adjust the pH to 8.5 with sodium carbonate aqueous solution, slowly add zinc chloride aqueous solution dropwise, the color of the solution gradually deepens, and red crystals precipitate out after a few days.

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Abstract

The invention provides a functional ligand for preparing a coordination polymer. A functional ligand molecule comprises gemini quaternary ammonium salt, a bi(salicylaldehyde amino acid) Schiff base conjugate unit and a carboxylic acid group. The water solubility of the functional ligand is guaranteed through the gemini quaternary ammonium salt, the bi(salicylaldehyde amino acid) Schiff base conjugate unit provides conditions for developing or fluorescence color development of the coordination polymer, and the carboxylic acid group reacts with metal ions so as to prepare the center of the coordination polymer.

Description

technical field [0001] The present invention relates to an organic ligand, in particular to a functional ligand of bis(salicylaldehyde amino acid) supported by a gemini quaternary ammonium salt, which is used to prepare organometallic coordination polymers (metal-organic frameworks, MOFs), and belongs to functional material field. technical background [0002] Organometallic coordination polymers, also known as organometallic frameworks or metal-organic coordination networks, refer to metal ions or metal clusters as nodes, organic ligands as bridging bodies, and metal-organic coordination networks. The coordination geometry of the ions and the diversification of the organic ligand structure form a porous framework coordination polymer with a periodic one-dimensional chain, two-dimensional layer or three-dimensional network structure through the self-assembly of the coordination bond. The metal ions used to prepare coordination polymers refer to transition metal ions and rar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/22C07D233/61
Inventor 贾海红张田林
Owner HUAIHAI INST OF TECH
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