A polyimide luminescent material, a preparation method, and a used thereof are disclosed; the polyimide luminescent material includes a polyimide resin and a rare earth complex distributed in the polyimide resin, wherein the polyimide resin is a condensation polymer of an aromatic diamine containing a bidentate chelate ligand and an aromatic dianhydride, and the rare earth complex and the bidentate chelate ligand are connected by a chemical bond. The luminescent material has enhanced fluorescence intensity, thermal stability, and mechanical properties. The preparation method is simple and easy, and is suitable for industrial production.

Disclosed are fluorescent water-soluble water treatment polymers suitable for use in scale inhibition in industrial water systems, the water treatment polymers comprising non-quaternized fluorescent naphthalimide derivative monomers. Also disclosed are methods of making the monomers, methods of making the polymers, methods of inhibiting scale in an industrial water system, and methods of using the polymers in coagulation and flocculation, and in cleaning applications.

The invention discloses a block copolymer intrinsic stretchable electroluminescent elastomer and its preparation method and application. This type of elastomer is made from organic electroluminescent monomers, styrene and 1,3-butadiene through anionic polymerization. The innovation of the present invention is: for the first time, the organic electroluminescence unit is introduced into the elastomer by chemical crosslinking. On the basis of improving the intrinsic stretchability of the elastomer, at the same time, it has characteristics of excellent luminescence and high carrier mobility, novel structure and unique design strategy; meanwhile, it also solves the inherent non-stretchability problem of traditional organic optoelectronic materials and the problem that traditional elastomers do not have electroluminescent properties. This type of elastomer is used as a light-emitting layer material to prepare organic electroluminescent devices with high stability, high stretchability and high efficiency.

A thermally activated delayed fluorescence (TADF) polymeric material having a molecular structure formed by a main chain of a polymerized TADF and a side chain connected to alkyl chains is provided. This structure of the TADF polymeric material has excellent TADF properties and solubility. Further, an electroluminescent device is prepared by solution processing and a good device effect is obtained.

A polymer for organic electroluminescent devices having high luminous efficiency and applicable to a wet process is provided. This polymer for organic electroluminescent devices is characterized in that it includes a polymer of a polyphenylene main chain represented by General Formula (1) which is used in at least one layer of an organic layer in an organic electroluminescent device formed by laminating an anode, the organic layer, and a cathode on a substrate, and which has thermally activated delayed fluorescence characteristics (TADF characteristics) (where x is a phenylene group or a linked phenylene group, L is a single bond, an aromatic hydrocarbon group, or an aromatic heterocyclic group, and A is an aromatic hydrocarbon group, an aromatic heterocyclic group, or a linked aromatic group, and satisfies S1(A)−T1(A)≤0.50 (eV)).

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The application discloses compounds, compositions, films and devices comprising the compounds and compositions, and their methods of use for harvesting water.

The present invention generally relates to fluorescent marking compositions and their use to determine whether a surface has been cleaned. More particularly, the marking compositions comprise fluorescent polymers.

The present subject matter provides compounds, compositions, and methods for identifying, monitoring, treating, and removing diseased tissue. Compounds, compositions, and methods for identifying, monitoring, and detecting circulating fluids such as blood are also provided.

Provided are: an organic electronic material which can be easily multilayered and that can be used in substrates, such as resin, that cannot be processed at high temperatures; an ink composition containing the same; an organic thin film formed using said organic electronic material or said ink composition; and an organic electronic element and an organic EL element that are formed using said organic thin film and that have a superior luminous efficacy and emission lifespan than conventional elements. Specifically, provided are: an organic electronic material that is characterized by containing an oligomer or a polymer having a structure that branches into three or more directions and has at least one polymerizable substituent; an ink composition containing said organic electronic material; and an organic thin film prepared using the aforementioned organic electronic material. Further, provided are an organic electronic element and an organic electroluminescent element containing said organic thin film.

An electrochromic polymer is comprised of a repeat unit comprising one or more meta-conjugated linkers (MCLs) and one or more aromatic moieties (Ars). Each of the one or more MCLs is partially conjugated with the one or more Ars at meta positions of the MCLs to form a polymer backbone of the electrochromic polymer. The electrochromic polymer undergoes an optical switching and a color change in an electrochromic device, which shows a high transparency and a high optical contrast.