6results about How to "Excellent fluorescence performance" patented technology

The present application mainly relates to a kind of preparation of sulfur-rich amino acid protein CMd-copper nanoclusters and its detection mercury ion method, comprising: a) by prokaryotic expression obtains CMd protein, and the protein concentration of 5 mg / mL-25 mg / mL CMd protein solution is obtained by purification.b) CMd is reacted with reducing agent TCEP after opening protein disulfide bond.c) the protein solution after reduction is reacted with anhydrous copper sulfate, and preparation high fluorescence CMd-copper nanocluster.d) CMd-copper nanocluster is applied to detect heavy metal mercury ion.The application method can be synthesized under mild aqueous conditions by "one-step method" structure controllable, stable CMd-copper nanocluster, widens the raw material of copper nanocluster synthesized with protein as template, avoids the use of organic solvent and strong reducing agent, and reduces the cost and environmental burden brought by noble metal raw material, and also has higher selectivity to mercury ion.

The invention discloses preparation and application of a multicolor nano fluorescent probe based on fluorescent micromolecules FRET, belongs to the technical field of medical reagents, and particularly relates to a preparation method of the nano fluorescent probe. Then adding an organic reagent and a siloxane precursor to prepare an organic phase solution, adding the organic phase solution into an alkaline water phase system to form nano particles, and finally coating the outer layer with silicon dioxide to prepare the nano fluorescent probe. The use volume ratio of the donor fluorescent small molecule solution to the receptor fluorescent small molecule solution is (0.5-1): (0-25). According to the invention, donor fluorescent micromolecules are HMAT blue fluorescent micromolecules, and receptor fluorescent micromolecules comprise BODIPY488 or Nile red.

This invention relates to the field of fabric technology, specifically to a breathable antibacterial fabric and its preparation process, and sportswear made from this fabric. The preparation process of the breathable antibacterial fabric includes: preparation of a composite antibacterial agent, preparation of multifunctional polyester fibers, amination modification of phenolic lignin, modification treatment of polyacrylonitrile, and preparation of the breathable antibacterial fabric. The breathable antibacterial fabric of this invention consists of inner, middle, and outer layers: the inner layer is a blend of modal and other materials, which is skin-friendly, moisture-wicking, and antibacterial; the middle layer is a polyurethane film layer; the outer layer contains polyacrylonitrile composite fibers, which are antibacterial, crisp, and breathable. A composite antibacterial agent made of chitosan, cysteine, and copper nitrate imparts dual antibacterial properties to the fabric, reducing bacterial resistance. Ethylene treatment enhances the bonding of components, improving wash resistance and antistatic properties; the co-spinning of amination-modified phenolic lignin and polyacrylonitrile increases fiber strength, breathability, and UV resistance. This fabric is suitable for sportswear.

The invention belongs to the technical field of fluorescence sensing detection, and particularly relates to a fluorescence sensor based on Ln-BMOF and a preparation method and application thereof. The preparation method comprises the following steps: mixing and dissolving Tb (NO3) 3.5 H2O, Eu (NO3) 3.5 H2O, 2-aminoterephthalic acid and o-fluorobenzoic acid in a DMF / H2O mixed solvent, heating, cooling to room temperature, filtering, and drying in vacuum to obtain the sensor Eu < 0.01 > Tb < 0.99 >-BDC-NH2. The device is quick in response, wide in application range and good in durability; in a wide pH range, the stable performance is still maintained after multiple times of recycling. The Eu < 0.01 > Tb < 0.99 >-BDC-NH2 obtained by the invention can be directly detected in an aqueous solution, is suitable for actual water sample analysis, can be repeatedly used, and provides a novel platform for on-site rapid screening of PA and Fe < 3 + > in the environment.

The application relates to a transition metal doped thermal injection type colloidal quantum dot and a preparation method thereof, and belongs to the technical field of quantum dot material synthesis. The method comprises the following steps: 1) mixing tellurium powder and tri-n-octylphosphine, heating to 140-160 DEG C under a protective atmosphere, and keeping the temperature for 20-40 min to obtain a tellurium precursor; 2) mixing silver acetate, a transition metal acetate and dodecanethiol, heating to 115-140 DEG C under a protective atmosphere, adding the obtained tellurium precursor, reacting for 10-20 min, and cooling to room temperature to obtain a quantum dot stock solution; and 3) separating and purifying the obtained quantum dot stock solution to obtain transition metal doped silver telluride quantum dots. The method is simple in operation, uniform in doping, and high in controllability; impurity energy levels are introduced under the premise of not damaging the crystal lattice structure through transition metal doping, the emission spectrum of the quantum dots is widened, wide spectrum light emission from visible light to near infrared is realized, and the optical performance and stability are effectively improved; and the obtained quantum dots can be widely applied to the fields of infrared detection, biological imaging and optoelectronic devices.

The application discloses a fluorescent composite material, a preparation method thereof and application thereof in detecting formaldehyde, and belongs to the technical field of formaldehyde detection. The fluorescent composite material is of a NaYF4@CDs@SiO2@MIP structure and is in a multilayer core-shell configuration, and its components are sequentially arranged from inside to outside as follows: an up-conversion energy core layer: NaYF4:Yb 3+ / Er 3+ nanoparticles; a fluorescent response intermediate layer: carbon quantum dots loaded on the surface of the core layer; a protection and function interval layer: a mesoporous SiO2 shell layer coated on the outer layer of the CDs; and a specific recognition outer layer: a formaldehyde molecular imprinting polymer shell layer with imprinting cavities complementary to the spatial structure and functional groups of formaldehyde molecules. The material can realize accurate quantitative detection of formaldehyde in the range of 0.003-12.1 mg / L, has a response time of less than 5 min under a 980 nm excitation light source, has excellent fluorescence stability and strong anti-interference capability, and can be directly applied to on-site detection of complex substrates.