Azobenzene polymer as well as preparation method and application thereof

A technology of azobenzene and polymers, applied in the field of supramolecular chiral immobilization, can solve the problems of high price, limited types of chiral polymers, and constraints on the development of chiral polymers, and achieve the effect of avoiding synthesis steps and simple operation

Active Publication Date: 2021-02-09
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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  • Azobenzene polymer as well as preparation method and application thereof
  • Azobenzene polymer as well as preparation method and application thereof
  • Azobenzene polymer as well as preparation method and application thereof

Examples

Experimental program
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Embodiment

[0106] 1) Synthesis of achiral methoxyazobenzene monomer

[0107] 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.

[0108] 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...

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Abstract

The invention discloses an azobenzene polymer as well as a preparation method and application thereof. An azobenzene polymer is prepared from monomers Az, AzOH, an RAFT reagent and an initiator; the azobenzene polymer is prepared into a film; and chiral reagent induction is carried out to obtain a chiral azobenzene polymer film. The method comprises the following steps: firstly, synthesizing an azobenzene random copolymer with hydroxyl at the tail end of a side chain through a series of organic synthesis reactions and RAFT polymerization, and carrying out detailed investigation on the molecular weight and the liquid crystal performance of the polymer by utilizing characterization means such as nuclear magnetism, GPC, DSC, POM and XRD; and then preparing the polymer film in a spin-coating manner. Chiral limonene steam can be selected to carry out chiral induction on the polymer film prepared by the method to obtain an optically active polymer film, and the optically active polymer filmcan be further cross-linked to obtain a cross-linked film.

Description

technical field [0001] The invention belongs to the technical field of supramolecular chiral immobilization, and relates to an achiral side chain type azobenzene polymer, which can be induced and cross-linked by chirality to obtain a chiral azobenzene polymer cross-linked film. 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, and even dissociates irreversibly, thereby destroying the formed chira...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/36C08J5/18C08L33/14
CPCC08F220/36C08J5/18C08F2438/03C08J2333/14
Inventor 张伟钱依琳缪腾飞程笑笑庄雅灵陆航朱筱妍熊联虎周年琛朱秀林
Owner SUZHOU UNIV
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