Azobenzene polymer and its preparation method and application

Abstract

The invention discloses an azobenzene polymer and its preparation method and application; the azobenzene polymer is prepared from monomers Az and AzOH, a RAFT reagent and an initiator; the azobenzene polymer is prepared into a film; and then passed through a chiral reagent Induction, the chiral azobenzene polymer film was obtained. 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; the next step is to make a polymer film by spin coating. The polymer film prepared by the invention can be chiralally induced by chiral limonene vapor to obtain an optically active polymer film and can 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...

AI Technical Summary

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.

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