62 results about "Electron deficiency" patented technology

The invention discloses a narrow-band-gap n-type polymer acceptor and a preparation method and application thereof. A structural formula of the polymer is shown as a formula I, a copolymerization unit 1 in the formula I is an A-D-A type molecule unit, the D is an aromatic condensed ring unit, the A is an electron deficiency acceptor unit, and a copolymerization unit 2 in the formula I is a conjugation aromatic ring unit. A narrow-band-gap n-type polymer material disclosed by the invention has good material film forming property, higher molar absorption coefficient, higher thermal stability, better charge transfer performance and appropriate electronic energy level, can serve as an electron acceptor material to be matched with a p-type electron donor polymer and can be applied to a full-polymer solar cell device. (The formula I is shown in the description.).

The invention relates to a preparation method of an anionic aqueous polyurethane dispersoid for fabric coating and decoration. The preparation method is operated according to the following steps that: (a) polyether polyol, polyester polyol and diisocyanate are subjected to polymerization reaction for 2 to 4 hours at 70 to 90 DEG C under the effect of catalysts; (b) acetone solvents and diamine hydrophilic chain extenders containing picolinic acid structures are added for taking reaction for 5 to 30 minutes at 40 to 65 DEG C, and polyurethane prepolymers are prepared; (c) the temperature is lowered to 20 to 40 DEG C, low-molecular-weight chain extenders and water are added and are emulsified through being stirred at high speed; (d) the acetone solvents are removed through reduced pressure distillation, and the anionic aqueous polyurethane dispersoid for fabric coating and decoration is obtained. Because diamine containing the picolinic acid structures is used as hydrophilic chain extenders, the regular pyridine ring structure is contained, the crystallization performance and the initial bonding intensity can be improved, meanwhile, a pyridine ring is an electron deficiency system, the color deepening caused by oxidation cannot easily occur, and the product has the yellowing resistance performance.

The invention belongs to the field of polymer electrolytes, and relates to a preparing method and application of a polymer electrolyte. According to the preparing method, a first reactant containing sulfydryl terminals and a second reactant with the two ends containing acrylate terminals are taken as raw materials, and under the function of a main catalyst and a cocatalyst, a sulfydryl-Michael addition reaction is carried out for preparing the polymer electrolyte. The first reactant at least contains three sulfydryl groups; the main catalyst is used for capturing protons on the sulfydryl groups of the first reactant to form thioalcohol negative ions, and the thioalcohol negative ions are used for attacking electron-deficiency double bonds in the second reactant; metal salt serves as the cocatalyst; positive ions of the metal salt and the second reactant are subjected to a complex reaction, so that the electron cloud density of the double bonds of acrylate is lowered, the process that the thioalcohol negative ions attack the double bonds of the acrylate for the sulfydryl-Michael addition reaction is promoted, and the reaction speed and the conversion rate of the addition reaction are increased.

The invention discloses a chemical preparation method of a graphene quantum dot fluorescence probe used for detecting trace of TNT (trinitrotoluene). The preparation process of the fluorescence probe comprises the following three steps: firstly, using HClO4 graphite oxide to prepare graphene oxide; secondly, using a buffer solution to adjust the pH value, using a strong reducing agent to reduce the prepared graphene oxide to graphene; and finally, putting the reduced graphene into an organic solvent in a polytetrafluoroethylene reaction kettle, closing, raising the temperature to 120 DEG C, reacting for 2 hours, and further processing to prepare the graphene quantum dot fluorescence probe capable of selectively and sensitively detect the TNT. A rich electron on the surface of the fluorescence probe and three electron deficiency nitro groups on a TNT target analyte molecule mutually act to cause fluorescence resonance energy transfer when getting close spatially, the fluorescence of the graphene quantum dot fluorescence probe is absorbed by the TNT target analyte molecule and is quenched, so that the trace of the target molecule of the explosive TNT is detected.

The invention discloses a mixture applied to a hole injection layer and an organic light emitting device thereof, and relates to the technical field of organic light emitting materials. The mixture comprises three components: a radialene compound, an aromatic amine compound including carbazole groups and a solvent, wherein the substituent group of the aromatic amine compound is selected from a series of electron deficiency groups, particularly the electron deficiency groups with nitrogen heteroatoms, such as triazine groups, pyrimidine groups and pyridine groups; the electron deficiency performance of the radialene compound is more prominent via the electron deficiency groups with the nitrogen heteroatoms; the aromatic amine compound is provided with carbazole electron-donating groups, andmost of the structure has deuterium atoms but no hydrogen atoms; the carbon-deuterium bond is more stable than the carbon-hydrogen bond by about 6-9 times, and thus the more stable compound is acquired. The acquired mixture in a wet film mode is used for preparing the organic light emitting device, particularly the hole injection material in the organic light emitting device; the device has the advantages of low drive voltage, high efficiency, high brightness and long service life, and is better than the currently common OLED devices.

The invention provides a preparation method for an aluminum oxide-based ceramic continuous fiber containing 1-5 wt% of B2O3. The method comprises the following steps that alumina sol containing Al13 colloidal particles, a pseudo-boehmite nano-dispersion, silica sol, a boric acid aqueous solution and a high-molecular spinning auxiliary are mixed so as to obtain a mixed solution; then aging and concentrating are carried out until the viscosity of a system is 500-1000 Pa*s so as to obtain spinnable precursor sol; and dry spinning, drying and calcining are carried out so as to obtain the aluminumoxide-based ceramic continuous fiber. According to the preparation method, the electron deficiency effect of boron is utilized, and addition reaction of water is carried out on the boric acid to formB(OH)4<->, so that the boric acid can be stably combined with polyhydroxyl pseudo-boehmite nano-particles so as to prepare the spinnable precursor sol and the fiber with excellent properties. The method has the advantages that the raw materials are easy to obtain, and industrialized application is easy to realize; and the diameter of the prepared fiber is 5-8 microns, the strength of the single fiber can reach 2.0 GPa, the modulus can reach 149 GPa, and various excellent performances such as high temperature resistance, flexibility and spinnability are achieved.

The invention discloses a fluorenone derivative, and preparation and application thereof. The fluorenone derivative takes a fluorenone structure containing electron deficiency carbonyl groups as a core, and an aromatic fused ring compound with the electron deficiency characteristic is further bridged to form a compound with high hole transfer. The fluorenone derivative serving as a hole transfer material and a luminous layer main body material of an OLED device has the advantages of remarkably improved performance of the device in starting voltage, luminous intensity, external quantum efficiency, current efficiency, power efficiency, chromaticity, half-life and the like, and enhanced working stability of the device.

The invention relates to a conjugated polymer containing trifluoromethyl shown as formula I or II as shown in the specifications; Ar1 and Ar2 are independently selected from a formula as shown in thespecification or a formula as shown in the specification; R1 and R2 are independently selected from hydrogen, alkyl with 1-30 carbon atoms, alkoxyl with 1-30 carbon atoms and alkyl sulphanyl with 1-30carbon atoms; A represents an electron deficiency group and is selected from any one of unsubstituted groups or groups containing substituents: monocyclic arylidene, dicyclic arylidene, arylene containing at least three cycles, monocyclic heteroarylene, dicyclic heteroarylene and heteroarylene containing at least three cycles; the cycles of dicyclic arylene, arylene containing the at least threecycles, dicyclic heteroarylene and heteroarylene containing the at least three cycles are condensed or connected by single bonds; substituents are independent aryl, alkyl with 1-30 carbon atoms, alkoxyl with 1-30 carbon atoms or alkyl sulphanyl with 1-30 carbon atoms; X is selected from N, O S or Se; and n represents the number of repeating units and is a natural number between 1 and 5000.

The invention relates to a fluorescent probe with generation of quenching phenomenon of fluorescence intensity in the existence of nitro compounds and other explosives. The structure of the fluorescent probe is shown, wherein R1-R4 are H, alkyl, aryl or substituent containing hetero atoms. The fluorescent probe has a large cavity structure in order to effectively combine nitro compounds, the electron-rich structure of the probe and electron deficiency performance of the nitro compounds determine a partial coupling effect of the charges after the two parts are combined, and quenching of fluorescence is generated, so that the effects for detecting nitro compounds and other explosives are realized.

A dihydrofuran compound is prepared through the reaction of the electron-deficiency diene and alkyne with the nucleophilic reagent with dual nucleophilic sites. Its advantages are simple preparing process and high yield.

The invention relates to hetero-metal iodide framework materials and a preparation method thereof, belonging to the technical field of molecule-based materials and preparation technologies thereof. According to the invention, under the guidance of related theories of crystal engineering and coordination chemistry, a tripyridine unit (TPT) with the attribute of electron deficiency is introduced into a metal halide system so as to realize designing and construction of a metal iodide hybridization framework; and a copper source, a lead source, an iodine source and a polypyridine unit are regulated and optimally assembled so as to prepare two Cu(I)-Pb(II) hetero-metal iodide framework materials with novel structures. The hetero-metal iodide framework materials have novel structures; the preparation method is simple in process, convenient to operate, enriches synthetic chemistry and structural chemistry of the polypyridine unit; and experimental materials are provided for related material chemistry.

The invention discloses a melamine foam prepolymer with high closed-cell percentage and a preparation method thereof, and belongs to the technical field of polymer materials. A boron modifier is added during the preparation process of the melamine foam prepolymer. Hydroxymethyl functionality degree of the melamine foam prepolymer modified by the boron modifier is increased. Electron deficiency of boron increases dehydration and condensation activity of hydroxymethyl functional groups. In the foaming process of melamine resin, the melamine prepolymer modified by boron can react quickly. A polymer with high crosslinking density can be formed rapidly around cells formed by a foaming agent and the cells are stabilized and maintained so that melamine foam with high closed-cell percentage is prepared, and the closed-cell percentage of the melamine foam reaches 95% or above.

The invention provides a polymer of a phenazine structure and a preparation method and application thereof. The structural formula of the polymer is shown in the formula I. Dithienyl acene is used as a main framework of an electron deficiency unit to be introduced into an azophenylene molecular structure; the conjugation degree of the molecules is effectively increased due to the fact that the prepared polymer is of the five-membered ring structure with the high planarity. The polymer has the wide absorption spectrum (the optical energy gap is smaller than 1.65eV), low HOMO energy level (lower than -5.5eV) and high migration rate (10<-4>-10<-3>cm<2>/Vs) and is applied to a photovoltaic device, and therefore the photoelectric conversion efficiency larger than 6% can be obtained.

The invention relates to a fluorene ring group-containing non-condensed ring organic small molecular material and a preparation method and an application thereof. 2, 7-di(4, 4, 5, 5-tetramethyl-1, 3-dioxo-2-borane)-9, 9-dioctyl fluorene is used as a central core unit, and a thiophene unit is introduced to enhance [pi] conjugation of a molecular main chain, on this basis, benzothiadiazole is introduced to increase the electron deficiency capacity of the obtained molecule, thiophene units are connected to the two sides to expand conjugation and finally reduce the energy band gap of the molecule, side chains on thiophene can improve the solubility of the molecule, and fluorine-containing cyanoindanone units are connected to the two ends to form effective charge transfer in the whole molecule.

The invention relates to a graphite negative material, a preparation method thereof and a cell. The preparation method of the graphite negative material comprises the following steps that a celluloseraw material, a catalyst and a dispersant are mixed, ball-milled and dried to obtain nanocrystal spheroidized precursor particles; and the nanocrystal spheroidized precursor particles are burned and then graphitized to prepare the graphite negative material. The catalyst is composed by a combination of a nickel compound and an electron deficiency compound. The graphite negative material has high electrochemical performance, and can reduce the production cost substantially.

The invention belongs to the field of ultrafiltration technology and specifically relates to a preparation method of an anti-clogging bacteriostatic charged nanofiltration membrane. According to the invention, hectorite and a surfactant and ethyl orthosilicate are compounded to form a stable porous heterogeneous material, a supporting material hectorite crystal is a lamellar structure formed by two layers of silica tetrahedron and an interlayer of magnesia octahedron; lamella has strong electron deficiency and bears a negative charge and has excellent adsorption and ion exchange properties; nano-silver oxide is embedded into the lamella, and modified inorganic particles are prepared; the inorganic particles are dispersed and a charged nanofiltration membrane is prepared; silver oxide powder is roasted and then decomposed into elemental silver; the elemental silver is used for selective catalytic reaction and reinforcement of inner pores of the charged nanofiltration membrane, and microbe loading is inhibited, membrane pore strength is effectively reinforced, anti-pollution performance of the charged nanofiltration membrane is improved and microbial reproduction is inhibited to prevent formation of a biomembrane. The preparation method has a wide use prospect.

The invention discloses a phenanthroline derivative and an organic electroluminescence device and belongs to the technical field of organic optoelectronic materials. The phenanthroline derivative is an electron deficiency system with a large conjugate plane, so that a high electron migration rate and high electron affinity can be achieved, and good electron transmission and injection properties can be achieved; in addition, the phenanthroline derivative disclosed by the invention has a certain hole baffling property. The central structure phenanthroline of the phenanthroline derivative has a large volume, the glass transition temperature and the thermal stability of the material are effectively improved, and material filming can be facilitated. An organic electroluminescence device of thephenanthroline derivative comprises an anode, a cathode and an organic matter layer, wherein the organic matter layer is positioned between the anode and the cathode; the organic matter layer comprises the phenanthroline derivative disclosed by the invention. The organic electroluminescence device disclosed by the invention has a low driving voltage, high light emission efficiency and light emitting brightness, and has a long service life.

The invention belongs to the field of organic semiconductor materials, and discloses an electron transfer polymer, and a preparation method and an application thereof. The polymer has a structural formula shown in the specification, and n in the formula is an integer in a range of 10-100. The benzothiadiazol ring of the electron transfer polymer has an electron deficiency, has an n-type structure, and can be used as an electron transfer material. The introduction of benzothiadiazole to the main chain of an anthracylimidazolyl polymer benefits the improvement of the electron mobility, so the luminous efficiency of an organic electroluminescent device can be substantially improved.

The invention discloses a preparation method for a cubic nanogold SERS probe used for TNT detection. The preparation method comprises seed crystal gold preparation, further growth and the functional modification and the self assembling of a silicon wafer. The preparation process of the preparation method comprises the following steps that: firstly, preparing seed crystal gold, and enabling the seed crystal gold to further grow; secondly, through a seed growth mechanism, strictly controlling the growth environment of the seed crystal gold to enable the seed crystal gold to grow into a cubic structure; thirdly, modifying sulfydryl on a polished 1*1cm<2> silicon wafer to enable a gold particle monolayer to be assembled to the surface of the silicon wafer on the own; and finally, modifying thesurface of the silicon wafer with electron-rich amino, realizing the selective recognition of the TNT further through a static electricity mutual function with three electron deficiency nitryls in aTNT target molecule, and utilizing a local area plasma resonance field on the surface of the nanogold to amplify and enhance the conventional Raman signal of the TNT molecule so as to realize the trace detection of the TNT, wherein a detection limit is 10<-9>mol.L<-1>. The preparation method has the advantages of being simple in preparation, convenient in operation, low in cost, good in selectivity and high in sensitivity.

The invention provides a metal organic-inorganic hybrid crystal based on a 2-F-5 methylpyridine ligand, and belongs to the technical field of photoelectric materials; the molecular formula of the metal organic-inorganic hybrid crystal is (C7H9NF)2[BiBr4], the space group is P21/n, and the cell parameters comprise alpha=90 degrees, beta=109.462(2) degrees, and gamma=90 degrees. In the invention, the 2-F-5 methylpyridine ligand has a good electron deficiency characteristic and is an ideal electron donating acceptor; the obtained (C7H9NF)2[BiBr4] metal organic-inorganic hybrid crystal has a goodphotoelectric effect after being hybridized with [BiBr4]<2->, and has a special photoresponse property under a current test, that is, the photoconductive resistance is increased after light is added,so that the (C7H9NF)2[BiBr4] metal organic-inorganic hybrid crystal can be used as a photoresponse material of a laser alarm.

The invention discloses a method for synthesizing 3-aryl substituted indolizine. The method comprises the following steps: in an ionic liquid medium, performing in-situ generation of a bromination aryl methyl substituted pyridine quaternary ammonium salt from pyridine and aryl methyl bromide, and further performing 1,3-dipolar-cycloaddition reaction with electron-deficiency alkyne under an alkali condition, so as to obtain a target product. Compared with a conventional synthesis method, the method has the remarkable advantages that firstly, reaction conditions are simple, and no transition metal catalyst is used; secondly, reaction conditions are gentle, and reaction reagents are relatively safe and cheap; thirdly, the solvent used in the reaction is an ionic liquid which has the advantages of being low in steam pressure, not liable to combustion or explosion, recyclable and the like.

The invention discloses a preparation method of a M1/M2xP-type monoatomic catalyst. The preparation method includes: (1) in an inert gas atmosphere, dissolving an organic complex M1L2 or M12L2, havingan electron deficiency structure, of a M1 metal in an organic solvent A to prepare a metal/organic complex solution; (2) adding a M2xP-type metal phosphide to an organic solvent B, and in an inert gas atmosphere, dropwise adding the metal organic complex solution, then performing a reaction in the inert gas atmosphere; (3) after the reaction in the step (2) is completed, adding a reducing agent to the system to perform a reduction reaction, and filtering a mixed liquid after the reduction reaction, and washing and drying filter residues to obtain the M1/M2xP-type monoatomic catalyst. The monoatomic catalyst is prepared through a novel coordination technology, so that various metal mono-atoms can be supported on various phosphorus-containing substrates, thus producing monoatomic catalystsin different types. The monoatomic catalysts are controllable in dispersity, active sites and support quantity.