33 results about "Intermolecular charge transfer" patented technology

The invention provides a phenanthro-carbazole donor-acceptor organic dye and application thereof in a dye-sensitized solar cell, and belongs to the field of organic dyes. The organic dye utilizes the characteristics of phenanthro-carbazole structural units such as a large plane conjugated system and higher fluorescence quantum yield to be connected with the structural units with different electronic withdrawing abilities so as to realize step-by-step regulation and control to the dye molecular energy level; meanwhile, a molecular non-conjugated skeleton is connected with a long alkyl chain, so that the solubility of phenanthro-carbazole units is improved, the difficulty in molecular synthesis and device processing is reduced, and charge transfer among molecules caused by molecular aggregation is reduced; meanwhile, raw materials of phenanthro-carbazole compounds are abundant in source, low in price and easy to cut structurally.

The invention provides an organic light-emitting diode. A luminescent layer of the organic light-emitting diode (OLED) is composed by mixing a donor material, an acceptor material and one of a fluorescence luminescent material or phosphorescence luminescent material or thermal-delayed fluorescence material or quantum dot luminescent material or perovskite material. The donor material and the acceptor material with the triplet state energy level being higher than 2.7eV and the glass transition temperature being greater than 120 DEG C are combined, the excited state of charge transfer between high energy molecules is obtained, and the energy is higher than 2.75eV. Through the high-efficiency anti-interstitial traversal and the fluorescence resonance energy transfer between the excited stateand a guest material, the complete utilization of singlet state and triplet state energy for the guest material is realized, and the obtained organic light-emitting diode has the advantages of high efficiency, low operating voltage and long service life, can be used in a display device or light source device and has a good commercial application prospect.

The invention relates to a polyimide material and a preparation method thereof. The polyimide material comprises diamine monomers, namely 2-(3,5-diaminophenyl)-4 and 5,6,7-(tetrafluorohydrazine isoindoline)-1,3-diketone. The preparation method comprises the steps of mixing the monomers and other aromatic diamines containing strong electron withdrawing groups, and then, reacting the mixture and fatty acid dianhydride to obtain polyimide. Fluorine atoms and the strong electron withdrawing groups are introduced to the structures of the diamine monomers, and meanwhile the diamines containing the strong electron withdrawing groups and the fatty acid dianhydride are used as polymerization monomers, so that the formation of intramolecular/intermolecular charge transfer complexes (CTC) is further inhibited, and the transparency of the polyimide is remarkably improved. The polyimide material prepared by using the preparation method has the advantages of high transparency, high glass transition temperature and favorable solubility and heat resistance and the like and has a wide application prospect in the relevant fields of flexible transparent substrates, flat panel displays and the like.

The invention discloses a diamine monomer containing a tetraphenylethylene-diarylamine structure, a preparation method and application of the diamine monomer in polyamide synthesis, belonging to the technical field of organic compounds. A polyamide material generally has the problems of dark color, poor fluorescent effect and the like, and the fluorescence effect is weak when a triphenylamine group is directly introduced into the polyamide material, so that a tetraphenylethylene structure and a triphenylamine group are combined together to obtain the diamine monomer containing the tetraphenylethylene-diarylamine structure and introduced into polyamide in the form of the diamine monomer, the twisted structure of the diamine monomer can weaken intermolecular charge transfer and improve the transmittance of polyamide, and the unique aggregation-induced emission phenomenon of the diamine monomer can greatly improve the fluorescence effect.

A composition of matter is provided that results in a change of electrical properties through intra-molecular charge transfer or inter-molecular charge transfer or charge transfer between a molecule and an electrode, wherein the charge transfer is induced by an electric field.

The invention provides a compound for an organic optoelectronic device and an organic optoelectronic element containing the compound and application and specifically discloses a compound shown as a chemical formula 1. A hole injection layer, a hole transmission layer, an electron blocking layer or a light emitting layer of an organic light emitting device (OLED) contains the compound. A donor group with high thermal stability and a receptor group are connected through a non-conjugated linkage system and the obtained compound can form an intermolecular charge transfer excitation state to realize light emission. Meanwhile, the compound has high glass transition temperature and good thermal and light stability. A preparation method of the compound is simple and large-scale production is easyto realize; the compound is used as a functional layer and is applied to an OLED element; the obtained element has the advantages of high efficiency, low operation voltage and long service life, can be applied to a display device or a light source device and has a very good commercial application prospect.

The invention provides an intermolecular charge transfer type fluorescent dyes and its preparation, which comprises using fine cavity transmission groups of triphenylamine, carbazole and fentiazin as electron donors, using nitrile radicals with strong pro-electron capacity as electron donors, forming C=N conjugated pi bond connection through simple condensation reaction, thus preparing a series of type P luminescent materials. Experiment has proved that, these materials are red electroluminescent materials having pure emission.

This invention discloses an intermolecular charge transfer chromogen with triphenylamine group, with a formula indicated by (1), wherein: R1 is hydrogen atom or methyl group or methoxyl group, R2 is hydrogen atom or 2-(5,5-dimethyl-3-vinylcyclohexenyl-2-enylidene)propanedinitrile group. This invention applies mild condition uses substituent group triphenylamine aldehyde or triphenylamine dialdehyde as raw material to react by heating with 2-(5,5-dimethyl-3-vinylcyclohexenyl-2-enylidene)propanedinitrile group to produce the intermolecular charge transfer chromogen with high decomposition temperature, non-coplanar structure, and triphenylamine group. By changing R1 and R2, it can obtain different absorption peak value and fluorescent emission peak, which could be used in photoluminescence, electroluminescence, data storage, light communication and bio-imaging.

The invention discloses a fluorescent conjugated polymer containing a DPP building unit as well as a preparation method and application of the fluorescent conjugated polymer containing the DPP building unit. By using a Sonogashira coupling method, the fluorescent conjugated polymer of which the main chain is of a DPP structure and the side chain has different structures is synthesized. In the invention, DPP is taken as an electron-deficient system, an intermolecular charge transfer can be formed between DPP and strong electron-donating anions, and electron donating abilities of different anions are different, thereby further affecting the fluorescence of a conjugated polymer to realize response detection of the anions. The fluorescent conjugated polymer containing the DPP building unit isapplied to sensing detection of common anions in a tetrahydrofuran solution system, thereby having the effect of responsive detection. After being detected, the fluorescent conjugated polymer has goodresponse to OH<->, F<->, Cl<->, Br<->, I<-> and AcO<-> and can visually observe color changes of the polymer solution and changes of fluorescence colors, thereby being convenient to realize the response detection of the anions.

The invention relates to a method for detecting diethyl chlorophosphate gas and/or sarin toxic gas based on a charge transfer complex. The method comprises the steps that a first compound containing aN,N dimethyl aromatic amine structure and a second compound containing a tetracyanoquinodimethane structure interacts through intermolecular charge transfer in a solvent to obtain a solution of the charge transfer complex; a sensing material is loaded on the surface of an electrode to form a sensor piece; and the sensor piece is put into the atmosphere containing the diethyl chlorophosphate gas and/or the sarin toxic gas to be detected. According to the method, through the charge transfer complex formed by mixing of the first compound and the second compound in the solvent, the high electronmobility and high hole mobility are achieved, the independent chemical physical properties of the first compound and the second compound are maintained while complexing is conducted, the charge transfer complex can serves as an electrochemical sensing probe to detect the sarin toxic gas, and the problems that in the prior art, detection sensitivity of the sarin toxic gas is low, specificity is low, the means is complex, and the cost is high are solved.

The invention discloses polyimide, a polyimide film and a preparation method thereof, and belongs to the technical field of film materials. The structural general formula of the polyimide is shown inthe specification, wherein Ar1 represents a tetravalent organic group with a C10-C64 aromatic ring group or alicyclic group; Ar2 represents a divalent organic group having a C6-C60 aromatic ring group. According to the polyimide disclosed in the embodiment of the invention, a coplanar rigid structure and a twisted non-coplanar rigid structure are introduced into a main chain structure; compared with the prior art, the advantages are that the intermolecular acting force of polyimide can be improved, the intermolecular conjugation effect is obvious, intramolecular and intermolecular charge transfer is obvious, meanwhile, molecular chains are uniformly arranged, and the rigidity effect of the polyimide molecular chains and the coloring degree of the film are improved, so that the polyimide film with excellent heat resistance and mechanical strength can be prepared.

The invention discloses a novel n type organic semiconductor material. The novel n type organic semiconductor material comprises five-parallel (six-parallel, seven-parallel or eleven-parallel) fused ring unit-based A-D-A type conjugated micromolecules and porphyrin micromolecules, wherein the five-parallel (six-parallel, seven-parallel or eleven-parallel) fused ring unit-based A-D-A type conjugated micromolecules are used for changing the position where a terminal electron-withdrawing group is linked with a penta aromatic heterocyclic ring according to structural characteristics of an A-D-A type receptor material, steric hindrance can be reduced, a material is enabled to have better steric configuration, and isotropic charge transmission can be favorably formed, so that the performance ofa device can be increased; the porphyrin micromolecules enable an electron-withdrawing terminal group A to be linked to a beta position of a penta heterocyclic ring or a meta position of a hepta heterocyclic ring according to the structure characteristics of a porphyrin compound, and better intermolecular charge transfer exists between a porphyrin core and the electron-withdrawing terminal group,so that the compound has better charge transmission performance; meanwhile, the steric hindrance can be reduced, and the material is enabled to have better steric configuration, so that the performance of the device can be increased.

The invention relates to a fluorenyl cyano indanone non-conjugated polymer receptor and a preparation method thereof. The invention relates to a conjugated polymer based on thiophene and benzothiadiazole and a preparation method thereof. According to the invention, a non-trapezoidal condensed ring micromolecule monomer is designed and synthesized by using fluorene and cyano indanone structural units, and then the non-conjugated polymer receptor with good solubility is synthesized by a Stille copolymerization method. According to the invention, non-trapezoidal fused ring small molecule receptors are bridged through a non-conjugated alkyl chain to form a main chain non-conjugated polymer receptor, the main chain non-conjugated polymer receptor has wide and strong absorption in a visible-near infrared region, and a flexible side chain can provide good solubility for a material. The effective intermolecular charge transfer can occur between the polymer and a donor, and the polymer has good physicochemical properties. Therefore, the material has a potential application prospect in polymer solar cells as a semiconductor active layer donor material.

The invention relates to an acceptor material based on a di(bithiophene)six-membered heterocycle as well as a preparation method and an application of the acceptor material. According to the small molecule acceptor material, an asymmetric five-membered fused ring structure composed of two fused dithiophenes and a six-membered ring containing an oxygen group heteroatom is used as a parent nucleus;conjugated groups are introduced into the two sides of the parent nucleus to serve as pi bridges, electron withdrawing terminal groups which are connected with the pi bridge and have specific structures are designed on the two sides of the parent nucleus; finally, a series of brand-new A-D-A type small molecule receptor materials with good solubility and good thermal stability are formed; the parent nucleus of the acceptor material has strong electron donating capability, the pi bridge effectively prolongs the conjugate length of the molecule; the terminal electron withdrawing group A can effectively adjust the lowest unoccupied molecular orbital (LUMO) energy level of molecules, widens the absorption spectrum of the material, reduces the optical band gap of the material, and enhances theintermolecular charge transfer ability, thereby enhancing the photocurrent, and is especially suitable for preparing solar cells with high short-circuit current and high energy conversion efficiency.