10 results about "Intermolecular charge transfer" patented technology

The present application relates to the field of photoelectric technology, especially to organic light-emitting material, organic electroluminescent device and preparation thereof. The organic light-emitting material based on acephenanthrylene derivative and the organic electroluminescent device thereof, the material is fused through benzene ring, ensures that the excited state has high oscillator strength, is conducive to radiation transition, and the rigid fused ring structure can effectively inhibit intramolecular vibration, helps to inhibit the non-radiative transition behavior of the excited state and obtain high photoluminescence efficiency, in addition, the molecule can form intermolecular charge transfer aggregate to reduce the non-adiabatic coupling of electrons, so as to realize low non-radiative transition rate, further improve the photoluminescence efficiency, and also can stabilize the excited state energy, can be further applied to organic electroluminescent device, realizes high electroluminescence efficiency.

The invention relates to the technical field of polyimide materials, in particular to a high-transmittance colorless transparent polyimide film and a preparation method thereof. The preparation method comprises the following steps: polymerizing a diamine monomer containing fluorine and amide groups, a fluorine-containing or ester ring dianhydride monomer and a triamine cross-linking agent to generate polyimide; and then carrying out gradient heating on the polyimide solution to form a film, so as to prepare the transparent polyimide film containing the intermolecular hydrogen bond and the micro-crosslinking structure. According to the invention, through the strong electron withdrawing capability and the large volume characteristic of the fluorine-containing group, the intramolecular and intermolecular charge transfer effect is effectively reduced so as to guarantee high transmittance; an intermolecular hydrogen bond is constructed by means of an amide group in the diamine monomer containing fluorine and the amide group, and a structural support is provided for the regular formation of a subsequent micro-crosslinking structure; and finally, a triamine cross-linking agent is combined to form a micro-cross-linked structure, so that the polyimide film keeps high transmittance, the dielectric property and the mechanical property are improved, and the polyimide film has high glass transition temperature.

The application discloses a hydrogen-bonded organic framework eutectic material, a preparation method thereof and application thereof in photocatalytic degradation of pollutants, and the hydrogen-bonded organic framework eutectic is a eutectic formed by assembling N,N'-di(5-m-phenylenediformyl) naphthalene diimide hydrogen-bonded organic framework and hexa-peri-hexabenzocoronene. The eutectic material has both porous structure and intermolecular charge transfer interaction. The hydrogen-bonded organic framework eutectic can efficiently photocatalyze removal of phenol which is difficult to degrade and highly toxic, and has great application value.

The invention discloses a method for detecting an impurity I in naproxen. A naproxen raw material medicine and 1, 2, 4, 5-tetracyanobenzene (TCBB) are fully ground and evenly mixed, then a fluorescence signal is detected under the 365 nm ultraviolet irradiation condition, if green fluorescence is generated, it is indicated that the raw material medicine contains the impurity I, and otherwise, it is indicated that the raw material medicine does not contain the impurity I. The fluorescent probe TCNB and the naproxen impurity I can generate specific intermolecular charge transfer interaction, so that a fluorescent signal is generated, and the visual impurity inspection of the naproxen impurity I is realized. According to the method, the probe and the naproxen impurity I can interact with each other through a grinding method which is simple, convenient and easy to operate, so that bright green fluorescence is generated, 0.1% of limited impurities can still be detected, and meanwhile, the probe cannot interact with naproxen, so that the detection of the impurity I is not interfered. Therefore, the impurity detection method provided by the invention has low detection limit, good specificity and anti-interference capability, can effectively analyze the trace impurity I in naproxen without pretreatment, and has a wide application prospect.

The invention provides an organic framework fluorescent material based on a pi bond. Aromatic units with electron pushing and pulling properties are combined to serve as basic units, and the Pi-bond organic framework material with excellent luminescent properties is constructed in a crystallization mode. The solid powder quantum yield of the organic framework fluorescent material BCZ-TRZ based on the pi bond is close to 100%, and is obviously higher than that of most existing framework structure luminescent materials. Benefited from the rigid plane structures of the BCZ and the TRZ, a good charge transfer effect between molecules is achieved. Particularly, through a framework structure constructed among molecules, the molecules are firmly locked, the vibration inactivation of the molecules is fully inhibited, and the quantum yield is extremely high. The Pi-bond-constructed pure organic framework with 100% quantum yield is reported for the first time, and the Pi-bond-constructed pure organic framework has a good application prospect.

The application relates to a high-efficiency organic luminescent co-crystal design, preparation and application, a host-guest doped luminescent material taking iodine-substituted carbazole derivatives as the host and application of the luminescent material in scintillation crystals, strong electron-accepting molecules are used as electron acceptors, twisted structure triphenyl phosphine oxide derivatives are used as electron donors, and the organic luminescent co-crystal is prepared through a solution evaporation method. The donor and acceptor molecules are combined and assembled into organic luminescent co-crystals with more rigid structures and more compact arrangements through non-covalent bond interaction. The non-covalent bond interaction in the co-crystal, especially the intermolecular charge transfer, can make the energy gap between the singlet state and the triplet state narrow, improve the intersystem crossing rate, and improve the utilization rate of the triplet exciton, so that high-efficiency luminescence is realized. The application provides a new design strategy for the design and preparation of novel organic luminescent materials, and is suitable for organic light-emitting diodes (OLEDs).

The application belongs to the field of organic electroluminescent materials, and relates to a kind of blue fluorescent material, and specifically relates to a kind of excimer donor material based on tri(triazole)triazine and application. With triazolotriazine and its derivatives as electron acceptor, acridine as electron donor, a kind of new excimer donor material is synthesized. Because the tri(triazole)triazine core is planar, the material has good electron transport capacity, and is conducive to better realization of intermolecular charge transfer with acceptor material molecules, and then higher efficiency excimer is obtained. The application discusses the relationship between molecular structure and performance in detail, and has important significance for constructing new excimer donor material.

This invention discloses a method for constructing intercalated conductive metal-organic framework materials, proposing a donor-acceptor dual-ligand synergistic strategy. This strategy utilizes the intermolecular charge transfer interaction between π electron donors and electron acceptors to construct long-range ordered conductive pathways, while simultaneously leveraging Cu... 2+ Novel conductive metal-organic frameworks (DA-MOFs) are constructed by achieving directional growth of the framework through specific coordination of donor sites. This D-A synergistic mechanism overcomes the carrier mobility limitations of traditional single-ligand MOFs. By constructing a D-A charge transfer system, while maintaining the inherent porous structure of the material, it promotes the synergistic effect of in-plane charge transport and out-of-plane charge delocalization of π-D / A stacking, significantly enhancing the bulk conductivity to the semiconductor level. This successfully solves the key problem of synergistically improving structural order and conductivity in the preparation of traditional conductive MOFs, thereby enabling the mass production of related high-performance metal-organic framework materials.

The invention provides a crystalline supramolecular polymer based on snap ring aromatic hydrocarbon. The polymer is obtained by self-assembling snap ring aromatic hydrocarbon (CLP) and a benzene diimide derivative (PDI-diol) through a subject and an object. The crystalline supramolecular polymer (PDI-diol-coated CLPalpha) can fully utilize the synergistic effect of various weak interactions, so that the charge transfer interaction between molecules can be remarkably enhanced very easily. The crystalline supramolecular polymer constructed based on charge transfer shows excellent gasochromic performance. The PDI-diol coated CLPalpha has efficient recognition and detection capability on n-alkylamine (C2-C8), the powder becomes light from bright orange, and a wide application prospect is provided for development of stimuli-responsive materials.

This invention relates to a high thermal conductivity, low dielectric epoxy resin composition and its preparation method. By weight, the high thermal conductivity, low dielectric epoxy resin composition comprises the following raw materials: 13-16 parts of thermally conductive filler, 45-50 parts of epoxy resin, 23-27 parts of curing agent, and 0.3-0.7 parts of accelerator. The thermally conductive filler comprises attapulgite, modified boron nitride, and aramid fiber in a mass ratio of 0.7-0.9:6-9:0.2-0.5. This invention uses attapulgite, modified boron nitride, and aramid fiber as thermally conductive fillers, and dicyclopentadiene epoxy resin and bisphenol A type epoxy resin as epoxy resin. By weakening intermolecular charge transfer, reducing polarization effects, and forming a three-dimensional thermally conductive network, an epoxy resin with high thermal conductivity and low dielectric properties is prepared.