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Metal ion mediated chiral polyamide material and preparation method thereof

A technology of metal ions and metal ion sources, applied in the field of preparation of chiral polyamide materials, can solve the problems of chiral structure regulation and application limitation

Active Publication Date: 2021-02-09
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, when chiral polyamide materials are prepared based on the supramolecular template method, the chiral structure of the prepared chiral polyamide materials is still controlled by its inherent molecular chirality. In a single-configuration template system It is difficult to effectively adjust its chiral structure according to the needs, which limits its application

Method used

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  • Metal ion mediated chiral polyamide material and preparation method thereof
  • Metal ion mediated chiral polyamide material and preparation method thereof
  • Metal ion mediated chiral polyamide material and preparation method thereof

Examples

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preparation example Construction

[0033] The invention provides a method for preparing a chiral polyamide material mediated by metal ions, comprising the following steps:

[0034] S1. Dissolve the chiral small molecule self-assembly and the metal ion source in an organic solvent according to a preset molar ratio to obtain a mixed solution; then add the first monomer and the second monomer to the mixed solution, and stir thoroughly forming a metal-mediated assembly reaction system; the monomer is a polyamine, and the second monomer is a polyacid or an anhydride;

[0035] S2. Polymerize in the metal-mediated assembly reaction system formed in step S1, and remove impurities from the product obtained in the polymerization reaction, and obtain the extracted product after removing the chiral small molecule self-assembly by extraction ;

[0036] S3. Vacuum drying the extracted product obtained in step S2 to obtain metal ion-mediated chiral polyamide or polyimide.

[0037] When the second monomer is a polybasic acid...

Embodiment 1

[0046] This embodiment provides a Mn 2+ A mediated chiral polyamide and a preparation method thereof, comprising the steps of:

[0047] S1. Dissolve the chiral small molecule compound L-16AlaPy5Br (0.06mmol) and manganese acetate tetrahydrate (0.06mmol) in 12mL of methanol to obtain a mixed solution; then add 5g of laurolactam and 0.05g of m- Phenylenediamine and 0.02g of NaH were raised to 164°C in a vacuum state; after that, the temperature was raised to 225°C, argon gas was introduced, 5mL of carbon dioxide was injected, and the reaction was carried out for 1h; finally, terephthalic acid was added into the flask, and after After 30 minutes, the reaction was terminated.

[0048] S2. Filter the reaction product obtained in step S1 to remove impurities, and then use ethanol Soxhlet extraction for 24 hours to remove the chiral amphiphilic small molecule compound to obtain an extraction product.

[0049] S3. After the extraction product obtained in step S2 is vacuum-dried at 3...

Embodiment 2～3

[0056] This embodiment provides a Mn 2+ Mediated chiral polyamide and preparation method thereof, compared with Example 1, the difference is that the content of manganese acetate tetrahydrate added in step S1 is different, and the addition of manganese acetate tetrahydrate in Example 2 and Example 3 The amounts are 0.06mmol and 1.2mmol, respectively, and the rest of the steps are consistent with Example 1, and will not be repeated here.

[0057] The Mn that embodiment 2~3 prepares 2+ The schematic diagrams of the chiral polyamide mediated by image 3 , Figure 4 shown. Depend on image 3 , Figure 4 It can be seen that the basic constituent units of the chiral polyamide materials prepared in Examples 2-3 are all right-handed helical structures, indicating that the addition of metal ions can mediate and regulate the chiral direction of the chiral polyamide materials. At the same time, compared with Example 1, the radius and pitch of the basic constituent units of the chir...

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Abstract

The invention provides a metal ion mediated chiral polyamide material and a preparation method thereof. According to the invention, a supramolecular template method is adopted, a chiral micromolecularself-assembly body is used as a template agent, polybasic acid or polybasic acid anhydride and polyamine are used as monomers, and a metal ion source is added to form a metal-mediated assembly reaction system; polymerization reaction is performed in the reaction system, a product is extracted, a chiral micromolecule self-assembly is removed and dried to obtain the metal ion mediated chiral polyamide material. With the adoption of the manner, the structure of the chiral small-molecule self-assembly body can be regulated and controlled through the coordination effect between the chiral small-molecule self-assembly body and different metal ions, so that the chiral structure of the chiral polyamide material is regulated and controlled; the technical defect that in the prior art, the chiral micromolecule self-assembly with a single configuration can only be used for preparing a chiral polyamide material with one configuration is overcome, and the chiral structure of the chiral polyamide material is effectively regulated and controlled.

Description

technical field [0001] The invention relates to the technical field of preparation of chiral polyamide materials, in particular to a chiral polyamide material mediated by metal ions and a preparation method thereof. Background technique [0002] Chirality is the property that a material entity and its mirror image cannot overlap, and is a ubiquitous feature in nature and life. Due to the existence of chiral features, chiral polymers often have properties that ordinary polymers do not have. Therefore, in the fields of optoelectronic materials, enantiomer sensors, chiral optical switches, chiral catalysis, chiral recognition and chiral resolution, etc. It has wide application and good development prospect. Among various chiral polymers, chiral polyamide materials refer to polyamides or polyimides with chiral characteristics. Compared with traditional polyamides or polyimides, the introduction of chiral characteristics can effectively improve The optical properties of polyami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/32C08G69/28C08G73/10
CPCC08G69/32C08G69/28C08G73/1071C08G73/1007
Inventor 王栋陈媛丽查新林樊辉王雯雯
Owner WUHAN TEXTILE UNIV
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