8 results about "Luminescent polymers" patented technology

The invention relates to the technical field of circular polarization luminescent materials, and discloses a luminescent object charge regulated chiral liquid crystal superstructure and a preparation method and application thereof. The chiral liquid crystal superstructure for charge regulation and control of the light-emitting object comprises a cellulose nanocrystalline liquid crystal film and an achiral light-emitting object embedded in the cellulose nanocrystalline liquid crystal film, the achiral light-emitting object comprises any one of carbon dots, organic light-emitting small molecules, light-emitting polymers or quantum dots; the surface of the achiral luminous object is positively charged or negatively charged. According to the chiral liquid crystal superstructure with the positively charged light-emitting object, the fusion of CNCs crystal aggregates is inhibited by utilizing the electrostatic crosslinking effect of positive charges, and a metamaterial with a Janus structure is constructed; the lower layer is a uniform cholesteric light-emitting layer composed of a light-emitting object / CNC liquid crystal, and the upper layer is a light-emitting object / CNC disordered light-emitting layer; the method breaks through the limitation of a traditional single rotation direction, and a left-rotation CPL and a right-rotation CPL are generated on the front face and the back face of the same superstructure respectively.

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 discloses a copper ion removing and detecting reagent based on cluster luminescent polymer microspheres, a preparation method and application thereof, and the reagent is obtained by sulfonating monodisperse porous cross-linked polystyrene microspheres, and the reagent is used for removing and specifically detecting copper ions. The one-step sulfonating monodisperse porous cross-linked polystyrene microsphere method is used to prepare the copper ion removing and detecting reagent based on cluster luminescent polymer microspheres. The polymer fluorescent microspheres based on cluster luminescence have excellent detection capacity for copper ions. Meanwhile, the sulfonic acid groups after the sulfonation treatment make the polymer microspheres have excellent copper ion removing capacity. The application provides a new method for copper ion detection and removal, and the new method has the advantages of simple operation, economy and good stability.

The invention discloses a mechanical response luminescent polymer based on an AIE polycaprolactone molecular ring and a preparation method thereof, and belongs to the field of mechanical response intelligent materials. The technical problems that an existing AIE-based mechanical response material is poor in mechanical property, low in response sensitivity and poor in cyclic reversibility are solved. The preparation method comprises the following steps: synthesizing linear polycaprolactone with an AIE group by taking dihydric alcohol containing an aggregation-induced emission group as an initiator; then preparing a linear precursor with polymerizable double bonds in a molecular chain segment and alkynyl and azido at the tail ends through multi-step end group functionalization reaction; the preparation method comprises the following steps: cyclizing a linear precursor to obtain an AIE polycaprolactone molecular ring containing double bonds; and finally, initiating double bonds on the ring through an initiator for polymerization to form a polymer network. The obtained material has very high elongation at break, high-sensitivity force-induced fluorescence enhanced response and excellent cycling stability, and can be widely applied to the fields of stress sensing, damage diagnosis, soft robots and the like.

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 invention discloses an aggregation-induced emission (AIE) polymer probe with lysosome targeting viscosity response as well as a preparation method and application of the AIE polymer probe. According to the probe, tetraphenyl ethylene (TPE) is used as an AIE luminous skeleton, and two hydrophilic flexible side chains are introduced by utilizing the excellent structural modifiability of the tetraphenyl ethylene (TPE). The tail end of each side chain is modified with pyridine positive ions, and the pyridine positive ions can specifically target a lysosome membrane through electrostatic interaction; the three ether groups embedded in the side chain effectively enhance the water solubility of the molecule. According to the invention, TPE and an amphiphilic flexible side chain are used to construct an AIE polymer, a TPE-derived AIE polymer probe (PTPEB-Py) is designed, and a drug action time-lysosome viscosity-fluorescence lifetime (t-eta-tau) three-dimensional linear relationship is constructed through intracellular and extracellular fluorescence lifetime signals so as to visualize a lysosome viscosity change value. Therefore, quantitative detection and visualization of lysosome viscosity change in the mitochondrial autophagy process in cancer cells are realized.

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.