3results about How to "High fluorescence quantum yield" patented technology

This invention relates to an intrinsically fluorescent polyester elastomer and its preparation method. The elastomer is copolymerized from vanillin-based aldehyde monomers with small-molecule cyano monomers and cyano-terminated polyethers or polyester diols via a Knoevenagel polycondensation reaction. By adjusting the molar fraction of the soft segment, a continuous transition from rigid fluorescent plastics to highly elastic fluorescent polyester elastomers can be achieved. The resulting material exhibits both high fluorescence quantum yield and high elongation at break, and can be applied in fields such as melt spinning, fluorescent anti-counterfeiting, and flexible optoelectronic devices.

This invention discloses a novel fluorescent probe for the detection of hydrazine hydrate, its preparation method, and its application, belonging to the field of fluorescent probe technology. The novel fluorescent probe provided by this invention uses a hemicyanine dye derivative as the fluorophore; simultaneously, the thiophene ester in the novel fluorescent probe serves as a specific recognition group for N2H4. On the one hand, its electron-withdrawing effect can efficiently quench the fluorescence of the hemicyanine dye derivative, making the probe "fluorescently silent" when not in contact with the target analyte; on the other hand, its unique structure endows the probe with excellent selectivity and sensitivity, ensuring specific recognition of N2H4. Furthermore, this novel fluorescent probe exhibits advantages such as high accuracy, high sensitivity, immunity to interference from various amino acids, common cations and anions, and good specificity when used for the quantitative detection of N2H4. It also has good pH adaptability and water solubility, thus showing promising application prospects in the detection of hydrazine hydrate.

The application discloses a kind of azahemicyanine dyes and application thereof, compared with the dye similar to the function of novel azahemicyanine dye molecule provided by the application, the application can effectively prevent the non-specific combination of serum albumin and hemicyanine dye, and the stability, fluorescence quantum yield and stoke shift of the hemicyanine dye are enhanced;The dye synthesis step provided by the application is simple, easy to purify, and has high yield;By introducing six-membered heterocyclic ring into the side chain of azahemicyanine dye, the combination with protein is effectively avoided, the false positive interference of serum albumin on dye fluorescence signal is excluded, and kidney targeting is realized, and the high fidelity of imaging is improved;The probe NA-H2S2 synthesized based on the dye NA-6 provided by the application is used for rapid detection of the change of H2S2 concentration;The synthesis step of the dye molecule is simple, easy to purify, has excellent imaging performance, fluorescence signal is not interfered by serum albumin, and is suitable for high-fidelity imaging of kidney.