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Chiral azobenzene polymer film and its preparation method and application

A polymer film and azobenzene technology, applied in the field of chiral azobenzene polymer cross-linked film and its preparation, can solve the problems of high price, restricted chiral polymer development, limited types of chiral polymers, etc.

Active Publication Date: 2022-06-07
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the chiral polymers obtained directly through organic synthesis use expensive chiral reagents, and the types of chiral polymers synthesized are also very limited, which greatly restricts the development of chiral polymers.

Method used

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  • Chiral azobenzene polymer film and its preparation method and application
  • Chiral azobenzene polymer film and its preparation method and application
  • Chiral azobenzene polymer film and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0102] 1) Synthesis of achiral methoxyazobenzene monomer

[0103] The raw material methoxyaniline (12.32 g, 0.1 mol) and concentrated hydrochloric acid were added to deionized aqueous solution (80 mL), magnetically stirred in an ice-salt bath for 0.5 h, and then 30 mL NaNO 2 (7 g, 0.1 mol / L) aqueous solution, after the dropwise addition, the reaction was continued for 0.5 h in an ice-salt bath to obtain a diazonium salt solution, and the system was red.

[0104] Phenol (16 g, 0.15 mol), NaOH (8 g, 0.2 mol), NaHCO 3 (8.4 g, 0.1 mol) was dissolved in 50 mL of deionized water, under ice-salt bath conditions (control temperature 0-5 °C), mechanically stirred, and then the previously obtained diazonium salt solution of p-methoxyaniline was added dropwise to the above In the phenol solution, the ice-salt bath condition still needs to be maintained at this time, and the solution gradually changes from colorless to yellow, and finally turns into brownish yellow. After the dropwise a...

Embodiment

[0121] Preparation of Achiral Azobenzene Polymer Thin Films and Chiral Azobenzene Polymer Thin Films by Chiral Steam Induction

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Abstract

The invention discloses a chiral azobenzene polymer film and its preparation method and application; the side chain type azobenzene polymer is prepared into a film; and then induced by a chiral reagent to obtain the chiral azobenzene polymer film. The design of the present invention first synthesizes azobenzene random copolymers with hydroxyl groups at the end of the side chain through a series of organic synthesis reactions and RAFT polymerization, and uses NMR, GPC, DSC, POM and XRD to evaluate the molecular weight and liquid crystal properties of the polymer. A detailed investigation is carried out; next, a polymer film is made by spin coating, and chiral limonene vapor is selected for chiral induction to obtain an optically active polymer film. In this way, chirality can be transferred from chiral solvent to non-chiral substance. The chiral solvent induction method of the present invention is simple to operate, and avoids complicated synthesis steps of chiral polymers and expensive chiral reagents.

Description

technical field [0001] The invention belongs to the technical field of supramolecular chiral immobilization, and relates to supramolecular chiral induction and cross-linking immobilization of achiral side-chain azobenzene random copolymers, in particular to chiral azobenzene polymer cross-linked films and Its preparation method and application. Background technique [0002] In the prior art, supramolecular chiral self-assembly is based on weak supramolecular forces such as hydrogen bonds, π-π stacking, acid-base interactions, metal-coordination interactions, and host-guest interactions. The element is a chiral small molecule or polymer, and its driving force is a reversible non-covalent weak interaction. This non-covalent weak interaction is less stable due to its weaker energy (generally less than 10 KJ / mol). , the chiral supramolecular ordered structure is easily affected by external stimuli (light, heat, pH, solvents, metal ions, etc.) and responds to a certain extent, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08J3/24C08L33/14
CPCC08J5/18C08J3/24C08J2333/14
Inventor 张伟缪腾飞程笑笑张正彪朱健周年琛朱秀林
Owner SUZHOU UNIV
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