4 results about "Luminescent polymers" patented technology

This invention relates to a method for synthesizing multicolored luminescent polymer films using a microwave approach. The method first involves dissolving acrylamide, ammonium persulfate, and α-thiophenecarboxylic acid trifluoroacetone in a solvent, then refluxing the mixture under microwave power. After cooling to room temperature, polymer A is precipitated with methanol. Polymer A is then dissolved in deionized water, europium nitrate solution is added, the pH is adjusted to neutral, the mixture is shaken, and after standing, polymer B is precipitated with methanol. Finally, polymer B is dissolved in deionized water to obtain a colloidal solution. The colloidal solution is dropped into a silicone mold and dried to obtain the multicolored luminescent polymer film. This invention provides a simple, convenient, and rapid preparation method that does not require inert gas protection and can complete polymerization within minutes, showing broad application prospects.

The application belongs to the field of mechanical color-changing materials, and relates to a tetraphenyl ethylene-containing cycloalkane and a preparation method thereof, and a mechanical response luminescent polymer based on AIE supramolecular cycloalkane and application. The structure of the tetraphenyl ethylene-containing cycloalkane is shown in formula I: in formula I, A is a tetraphenyl ethylene structural unit, m is an integer of 2-20, and n is an integer of 2-20. In the application, AIEgens is designed as a cycloalkane, and the mechanical force only changes the conformation of the ring, that is, only the intramolecular interaction is changed so as to change the luminescent intensity of the molecule. The luminescent characteristics are independent of the AIEgens concentration and the morphology of the material. The mechanical response luminescent polymer based on AIE supramolecular cycloalkane has stronger applicability.

The application discloses a method for constructing atypical near-infrared light-emitting polymers based on itaconic anhydride and application thereof, and belongs to the technical field of organic light-emitting materials. The method comprises the following steps: first, preparing a thiol-containing intermediate by reacting N-methyldiethanolamine derivatives with double / multi-thiol compounds; and then, performing nucleophilic ring-opening polymerization on the thiol-containing intermediate and itaconic anhydride to obtain a target polymer. The polymer is completely composed of non-conjugated structural units and does not contain a pi-conjugated aromatic ring, and the light emission is derived from cluster-induced light emission promoted by strong ion interaction formed in the polymerization process. By selecting different thiol compounds and regulating the topological structure (linear or hyperbranched) of the polymer, a polymer with an emission wavelength in the 600-800 nm near-infrared region can be prepared. The polymer has the advantages of simple synthesis, good water solubility, high biocompatibility, aggregation-induced light emission, pH / ion response and the like, and has important application value in the fields of near-infrared fluorescence imaging and biosensing.

The application belongs to the technical field of light-emitting polymers, and particularly relates to a long-afterglow polymer material and a preparation method and application thereof. The long-afterglow polymer material is successfully prepared by taking tri(4-boronic acid phenol ester phenyl) amine as a light-emitting center and an electron donor and an aromatic polyester with strong electron-accepting ability as a polymer matrix. The interaction between the electron-rich tri(4-boronic acid phenol ester phenyl) amine and the strong electron-withdrawing aromatic polyester effectively slows down the non-radiative transition process of excitons, and thus realizes a long-afterglow effect with a maximum of 12 hours. In particular, when the long-afterglow polymer material is excited by sunlight, the afterglow intensity is significantly improved, and the green afterglow can be maintained for up to 6 hours. In addition, the material also exhibits excellent flexibility and transparency. Moreover, the preparation process of the material is simple, and is expected to be applied in the fields of flexible display, anti-counterfeiting, information storage and wearable smart devices.