67results about How to "Hard to quench" patented technology

The invention discloses a preparation method of carboxyl polystyrene copolymerized fluorescent microspheres, which is to put absolute ethanol, initiator azobisisobutyronitrile, and dispersant polyvinylpyrrolidone in water to obtain a clear and transparent solution, and inject the same into the solution at the same time Styrene, acrylic acid and allyl fluorescent dye are added, and the copolymerization reaction is carried out under the protection of nitrogen to obtain carboxyl polystyrene copolymerized fluorescent microspheres. The invention adopts a dispersion polymerization method, and the prepared carboxyl polystyrene copolymerized fluorescent microsphere has good monodispersity and stable fluorescent performance.

The invention discloses a ruthenium (II) complex, the structure of which is as follows:; also discloses the preparation method of the compound, including the steps: first use o-phenanthroline 5,6-dione and X-diketone as raw materials to prepare X- RPIP, and then use X‑RPIP and cis‑Ru(L)2Cl2 as raw materials to prepare the product. Alternatively, X-RPIP is first prepared from X-BrPIP and X-RPIP, and then X-RPIP and cis-Ru(L)2Cl2 are used as raw materials to prepare the product. Alternatively, the ruthenium precursor Ru(L)2Cl2 and X‑R'''PIP are reacted as raw materials to prepare Ru(L)2(X‑R'''PIP)2+, and then Ru(L)2( X‑R'''PIP) 2+, the product is prepared as raw material. The synthesis method of the present invention is simple, especially the synthesized Λ-[Ru(bpy)2(p-BEPIP)]2+ is non-toxic to living cells, transmembrane rapidly, the fluorescent color is strong and easy to observe and not easy to quench, and the fluorescence excitation and The emission bands do not overlap and can be enriched in the nucleus.

The invention discloses a preparation method of a fluorescent waterborne polyurethane emulsion based on chromophore in diisocyanate. The preparation method is characterized by comprising the following steps of: enabling monoamine or monohydric alcohol containing fluorescent chromophore to be reacted with isocyanate, or enabling diamine or dihydric alcohol containing the fluorescent chromophore to be reacted with diisocyanate with a symmetric structure to synthesize diisocyanate containing the fluorescent chromophore, and then combining the diisocyanate containing the fluorescent chromophore with common diisocyanate to partially or completely substitute for the common diisocyanate to prepare the fluorescent waterborne polyurethane. According to the preparation method disclosed by the invention, the hard segment content and type of the prepared fluorescent waterborne polyurethane and the content (2-40wt%) of the fluorescent chromophore are controllable by adjusting the types and proportions of the diisocyanate and a chain extender, and the prepared fluorescent waterborne polyurethane has the advantages that the fluorescent chromophore is uniformly distributed and difficult to migrate, the fluorescent intensity is good in durability, and improvement in terms of optical, thermal and certain functional characteristics can be achieved while the fluorescent property is achieved.

The present invention relates to an OLED material, which has any structure as shown in general formulas I-III. The OLED material provided by the invention is a compound centered on per-peridonne, with high T1 energy level, narrow band gap and shallow highest occupied molecular orbital (HOMO) energy level. Xanthene and xanthene are easily sublimated and stable in the air without oxidative decomposition. It has high thermal stability and high glass transition temperature in air. By introducing groups with relatively large steric hindrance, this type of luminescent material is not easy to crystallize and quench, and has good film-forming properties. As a preferred solution of the present invention, the OLED material is used as a hole-transporting material of the hole-transporting layer.