Chiral azobenzene polymer film as well as preparation method and application thereof

Abstract

The invention discloses a chiral azobenzene polymer film as well as a preparation method and application thereof. A side chain-type 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 preparing a polymer film in a spin-coating manner, and performing chiral induction on the polymer film by selecting chiral limonene steam to obtain an optically active polymer film. The chirality is transmitted from a chiral reagent to an achiral substance. The chiral solvent induction method provided by the invention is simple to operate, and avoids the complex synthesis steps of the chiral polymer and the use of 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...

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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.

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