56results about How to "Large conjugated structure" patented technology

The invention discloses application of a diketopyrrolopyrrole derivative. The diketopyrrolopyrrole derivative has a selective complexation effect on Hg<2+>, can easily realize decomplexation and is applicable as an Hg<2+> recognition substance to preparation of a fluorescent sensor used for detecting Hg<2+> in an aqueous solution. The prepared fluorescent sensor used for detecting Hg<2+> has the characteristics of recognizability with naked eyes, high sensitivity and repeated usability, has high Hg<2+> selectivity and is free of interference by cations like Ag<+>, Pb<2+>, Cu<2+>, Cr<3+>, Mn<2+>, Fe<3+>, Co<2+>, Ni<2+>, Zn<2+>, Cd<2+> and Al<3+> in detection of Hg<2+>. The fluorescent sensor is widely applicable to the fields of environmental engineering, biological detection, etc.

The invention discloses a quinazoline triazole derivative as shown in formula (1) and application thereof in organic light-emitting materials. The quinazoline triazole derivative is high in glass-transition temperature, high in melting point and high in carrier transport and light-emitting efficiency. An organic electroluminescence device which is low in drive voltage and high in light-emitting efficiency is obtained by applying the quinazoline triazole derivative to a host material using an organic light-emitting functional layer as the light-emitting layer.

The invention belongs to the technical field of polymer synthesis, and discloses a preparation method of an imidazole type ionic liquid porous organic polymer. The method comprises the following steps: synthesizing tetra(nitrophenyl)porphyrin by using p-nitrobenzaldehyde and pyrrole as monomers and propionic acid and acetic anhydride as solvents through a propionic acid-anhydride method; reducingthe tetra(nitrophenyl)porphyrin by using a reducing agent to obtain tetra(aminophenyl)porphyrin; and enabling amino groups to form imidazole ring cations with a 1,2-dicarbonyl compound and an alkylaldehyde compound under an acidic condition, and allowing porphyrin monomers to connected with one another through imidazole rings, thereby forming the heterogeneous porous organic polymer. According tothe preparation method, polymerization can be realized by virtue of Debuus-Radziszewski imidazole synthesis reaction of substituted anilino functional groups on four mutually symmetrical methylenes oftetra(aminophenyl)porphyrin, so the ionic liquid porous organic polymer containing imidazole type cation/anion groups is obtained, and the preparation of a non-metal heterogeneous photocatalyst can be greatly simplified.

The invention discloses a two-dimensional conjugated BDF organic micro-molecular photovoltaic material, and a preparation method and an application thereof. Two-dimensional conjugated BDF organic micro-molecules with the structure represented by formula (I) are obtained by connecting a thiophene conjugate side chain-containing benzo[1,2-b;3,4-b]difuran (BDF) unit with another aryl heterocycle through a Stille coupling technology. The organic micro-molecular photovoltaic material has wide visible region absorption, suitable HOMO and LUMO energy levels and narrow band gap. Organic solar cells are produced by using the organic molecules as an electron donor and PC61BM as an electron receptor, the maximum energy conversion efficiency of the organic solar cells reaches up to 3.7%, and the organic solar cells have a good photoelectric conversion efficiency.

The invention provides compounds and application thereof, and an organic light-emitting device comprising the compounds. The compounds have a structure as shown in a formula (I). The compounds are used as light-emitting materials in the organic light-emitting device. The organic light-emitting device comprises a substrate, a first electrode, a second electrode and at least one organic layer interposed between the first electrode and the second electrode, wherein the organic layer contains any one or a combination of at least two of the compounds. The compounds have good electron transport capability, can realize carrier balance, are used for the organic light-emitting device, and can effectively reduce turn-on voltage and improve light-emitting efficiency.

The invention discloses a method for preparing a lithium-sulfur battery diaphragm material from a fluorine-containing covalent organic framework material, and belongs to the technical field of energy materials. A novel COF material (COF-F) rich in fluorine atoms serves as a modified diaphragm material of a lithium-sulfur battery, diaphragm modification has the shuttle effect influence on the lithium-sulfur battery and the anchoring effect on polysulfide, and the novel COF material is successfully prepared in a gradual heating mode and has high crystallinity. And when being used as a modified diaphragm material of the lithium-sulfur battery, the modified diaphragm material can reinforce anchoring of polysulfide and aims at improving the electrochemical performance of the lithium-sulfur battery. And compared with the same COF structure without fluorine, the characteristics of the material are highlighted. The material has triazinyl and fluorine functional groups, so that the chemical bond action on polysulfide can be enhanced, and the cycle performance of the lithium-sulfur battery can be remarkably improved.

The invention discloses a polarity-sensitive fluorescence probe and a preparation method and application thereof. A structural formula of the probe is as shown in the specification, wherein R1 is H, CH3, CH3CH2 or COOH; and R2 is CH3, CH3CH2 or CH3CH2CH2. The preparation method comprises the following steps: reacting a reactant 1 and a reactant 2 at a low temperature in an anhydrous anoxic reactor; and adding a reactant 3, reacting at a room temperature, and carrying out treatment such as skimming and purification, so as to obtain the probe. The probe has the specific fluorescence response on the solvent polarity, and is fast in response; the fluorescence wavelength is relatively large during response; the preparation method is simple; and the response detection on the solvent polarity is convenient.

The invention relates to the technical field of luminous materials, in particular to a tetraphenylethylene-phenanthroimidazole derivative and a crystal, preparation method and application thereof. Thedisclosed tetraphenylethylene-phenanthroimidazole derivative has a structure represented by a formula (I), wherein R1 is selected from -OCH3,-O(CH2)3CH3 and -O(CH2)5CH3 or a strong electron donatinggroup, and n is 1-2. In the derivative, tetraphenylethylene and phenanthroimidazole are connected through a benzene ring, and since an AIE effect can be generated by an extremely twisted structure oftetraphenylethylene, an ACQ effect of a luminous material with high concentration can be weakened by introducing a TPE group; the phenomenon of exciton annihilation can be effectively inhibited, so that molecules achieve stronger fluorescence emission in a high concentration aggregation state in comparison with a low concentration aggregation state. Meanwhile, because the relative molecular weightof the compound is large, a large conjugated structure exists, and the stability is high. According to experimental data, the provided tetraphenylethylene-phenanthroimidazole derivative can cause anobvious AIE phenomenon and has high thermal stability and luminous intensity.

The invention provides a preparation method and application of a cadmium-based metal organic framework Cd-MOF material. The preparation method is characterized by comprising the following steps: step1, dissolving cadmium nitrate in water, dissolving a ligand 5-(bis(4-carboxylbenzyl)amino isophthalic acid in N,N-diethylformamide, and mixing the ligand 5-(bis(4-carboxylbenzyl)amino isophthalic acidand N,N-diethylformamide with ethanol; step 2, pouring the mixed solution into a polytetrafluoroethylene reaction kettle lining, and carrying out ultrasonic treatment; step 3, putting the reaction kettle into a blast drying oven for heating; and step 4, cooling the reaction kettle to room temperature, and filtering the reaction solution to obtain the yellow petal-shaped Cd-MOF crystal. The synthesis method of the Cd-MOF fluorescent material is simple, the yield and the purity are high, the accurate structure of MOF can be analyzed through single crystal diffraction, and the Cd-MOF fluorescentmaterial synthesized by the method has the characteristics of simple operation, less time consumption and low cost when alpha,beta-unsaturated aldehyde and saturated aldehyde are distinguished and detected.

The invention relates to the technical field of organic electroluminescent display and discloses an organic electroluminescent device. The organic electroluminescent device comprises an anode, an organic layer and a cathode layer, and the organic layer is positioned between the anode and the cathode and comprises a hole transmission layer and an electron transmission layer. The hole transmission layer contains a spirobifluorene derivative in a structural formula I-1 as shown in the specification, and the electron transmission layer contains a compound in a structural formula II as shown in thespecification. Due to equivalence of hole transmission performances of the spirobifluorene derivative to electron transmission performances of a phenanthroline derivative, balance in hole and electron transmission is achieved, effective combination in a light-emitting layer can be realized, the carrier utilization rate is increased, and effective light emitting of the device is realized. In addition, the organic electroluminescent device has advantages of low drive voltage, high luminance, high light emitting efficiency and long service life.

The invention provides a corona-resistant coating for a cable and a preparation method of the corona-resistant coating, and particularly relates to the technical field of cable materials. The coatingis prepared from the following raw materials: acrylic resin, ethanol, N,N'-diisopropylcarbodiimide, perfluoropolyether, resina draconis extract, mica, graphite type boron nitride, benzylidene-bis(triphenylphosphine)ruthenium dichloride, porphyrin compound, zirconium oxide and hexadecyltrimethylammonium bromide. The preparation method comprises the following steps: a, primary catalytic reaction; b,stabilizing treatment; c, secondary catalytic reaction; d, charging of nitrogen; and e, pre-coordination treatment. The coating disclosed by the invention can be well attached to a wire, does not generate air intermittence, has an air isolation effect and a highly conjugated structure, can play a role in preventing corona from multiple aspects, has corona resistance of 250 minutes, is not easy tocrack, has good insulativity and is not easy to break down. The method is stable in process, controllable in parameter, easy to repeat and suitable for large-scale production.

The invention provides a bonded polyurethane nonlinear optical material as well as a preparation method and application thereof. The bonded polyurethane nonlinear optical material is prepared by connecting a small-molecule pyrenyl Schiff base derivative into a polyurethane system. Compared with a small-molecule pyrenyl Schiff base derivative, a polyurethane material which does not have optical nonlinearity originally has stronger anti-saturation absorption and optical limiting performance. The optical nonlinearity of the pyrenyl Schiff base derivative can be controlled by changing the content of the added small-molecule pyrenyl Schiff base derivative, the purpose of adjusting the optical nonlinearity property of the pyrenyl Schiff base derivative is achieved, and the pyrenyl Schiff base derivative has controllable optical nonlinearity response. The bonded polyurethane nonlinear optical material is high in optical nonlinear response speed, short in recovery time and indistinguishable in a picosecond time domain, and can be made into an optical limiting and all-optical switch material for application.

The invention discloses a novel, stable and good-solubility D-A polymer based on conjugate plane expansion of 3,4,9,10-perylenetetracarboxylic diimide and a preparation method of the D-A polymer. Thepolymer effectively improves the device performance of an organic semiconductor. The structural general formulas of the D-A polymer based on the conjugate plane expansion of 3,4,9,10-perylenetetracarboxylic diimide are shown as formulas (I) and (II). In the formulas, R and R'are C5-C18 fork chains or straight chains, and n is a positive integer in a range of 1 to 100.

The invention relates to the technical field of organic synthesis, in particular to a polymer based on (E)-1, 2-bis (2-thiophene) ethylene and benzothiadiazole as well as a preparation method and application of the polyme. R in the polymer is alkyl, the number of carbon atoms is 6-14, X is tin salt or borate, and Y is H, F or Cl. The polymer has excellent sunlight capturing capability and hole transport capability as an active layer material. Because of the thermal stability, solution processability and light absorption of the polymer, the polymer has a good application prospect in the photoelectric fields of solar cell devices, organic electroluminescent devices, organic field effect transistors and the like.

The invention provides a preparation method and an application of a conjugated molecule based on fluoro-benzo-thiadiazole. The preparation method includes the steps: taking methylbenzene as a solvent;taking tetra (triphenylphosphine) palladium as a catalyst; reacting IDTT-fBT (thiophene-fluorobenzothiadiazole) and 2-((6-fluoro-7-benzo[c] [1, 2 and 5] thiadiazole-4-radical) methylene) propane dinitrile at the temperature of 90-110 DEG C to the conjugated molecule based on the fluoro-benzo-thiadiazole. Compared with the prior art, the benzo-thiadiazole has suitable LUMO (lowest unoccupied molecular orbital) and HOMO (highest occupied molecular orbital) energy levels and excellent planarity, so that a conjugated structure of a molecule can be effectively expanded, a fluorine atom is introduced onto a benzene ring, the charge transfer rate in the molecule can be increased as the fluorine atom has high electronegativity, spectrums are absorbed by the fluorine atom, the conjugated moleculecan serve as a receptor material to prepare solar cell devices, and high performance is acquired.

The invention provides a novel organic electroluminescent material for an organic electroluminescent device, and the organic electroluminescent device using the novel organic electroluminescent material. The novel organic electroluminescent material provided by the present invention is represented by a formula (I) as described in the description.

The invention discloses an organic porous framework material with adsorptive desulfurization performance and a preparation method thereof. According to the principles of the Knoevenagel reaction, an aldehyde compound and a cyano compound with active alpha-hydrogen atoms are subjected to a condensation reaction under a weakly alkaline condition, so a graphene-like organic porous framework material product in which reaction monomers are connected by carbon-carbon double bonds is finally obtained. The prepared material has a large-area conjugated structure unit, and due to the structural characteristic, the material has a more remarkable adsorption effect on aromatic thiophene sulfur compounds compared with alkane compounds.

The invention discloses graphene fiber and a preparation method thereof, and the preparation method comprises the following steps: (1) mixing graphene oxide with a polar solvent to obtain a graphene oxide liquid crystal dispersion liquid; (2) mixing and swelling polyacrylonitrile powder with ethanol, water and inorganic matters to obtain a polyacrylonitrile solution; (3) solidifying and forming the graphene oxide liquid crystal dispersion liquid in the polyacrylonitrile solution, washing and drying to obtain graphene oxide fiber; (4) carrying out heat stabilization and carbonization treatmenton the graphene oxide fiber to obtain the graphene fiber. The graphene fiber prepared by the method has relatively good compactness and relatively high mechanical property. Specifically, compared withcommon graphene fiber, the monofilament strength of the obtained graphene fiber can be improved by at least 9%, and the modulus can be improved by at least 12%.

The invention discloses a benzothiadiazole-based acceptor material, and a preparation method and application thereof. An electron acceptor material of a polymer solar cell with an ultra-narrow optical band gap is obtained by taking a hydroformylation seven-membered benzothiadiazole fused ring as a core, introducing different numbers of vinyl pi bridges and then introducing a strong electron withdrawing group at the tail end. The polymer solar cell acceptor material provided by the invention has a proper energy level orbit and excellent carrier transport performance, is a potential substitute of a fullerene electron acceptor, and can be widely applied to preparation of high-performance polymer solar cell devices.

The invention relates to a method for preparing yellow azo dyes by degrading waste polyester fibers. The method comprises the following technological steps: (1) degrading waste polyester fibers by glycol, thereby obtaining a product bis(2-hydroxyethyl) terephthalate; (2) nitrifying and restoring the BHET, thereby obtaining ABHET (Amino bis(2-hydroxyethyl) terephthalate); and (3) preparing azo dyes by carrying out diazo coupling on the ABHET. The invention relates to the technical fields of solid waste treatment, polyester degradation, textile dyeing and finishing and the like. The waste polyester fibers are degraded by glycol to obtain the BHET, and then a series of azo dyes are prepared by the reactions of restoring, diazo coupling and the like, so that the waste polyester fibers are recycled effectively. The type of azo dyes can be used for dyeing synthetic fibers and textiles thereof, such as chinlon and dacron.

The invention protects a compound and application thereof. The compound is represented by the following formula (1) as shown in the specification, wherein A<1>-A<8> are same or different and are independently selected from one of the following formula (1-1) or formula (1-2) as shown in the specification or the following groups: hydrogen, deuterium, substituted or unsubstituted C1-C10 alkyl, substituted or unsubstituted C1-C10 cycloalkyl, substituted or unsubstituted C1-C10 alkoxy, substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl, and besides at least twoof the A<1>-A<8> are selected from the formula (1-1) or the formula (1-2) as shown in the specification. L<1> and L<2> are each independently selected from one of a single bond, substituted or unsubstituted C6-C30 arylene, and substituted or unsubstituted C3-C30 heteroarylene; and Ar<1> and Ar<2> are independently selected from one of substituted or unsubstituted C3-C30 heteroaryl. When being used as an electron transport material in an OLED device, the compound exhibits excellent device performance and stability. The invention also protects organic electroluminescent devices using the compound of the general formula.