56results about How to "Molecular weight determination" patented technology

The invention belongs to the technical field of photoelectric materials, and particularly relates to luminescent materials based on thioxanthene-fluorene spiral structures and organic photoelectric devices adopting the materials as luminescent layers. The luminescent materials adopts the thioxanthene-fluorene spiral structures as skeleton units. Intermediates are prepared through Ullmann reactions, and then the target compounds are obtained through Ullmann reactions or Suzuki reactions. The materials are single in structure and definite in molecular weight. The spiral structures of the materials can adjust an intermolecular accumulation manner, thus effectively inhibiting exciplex luminescence. The materials have deep meaning for development of high-effect devices. The organic photoelectric devices adopting the materials as the luminescent layers have good luminescent properties and can be used for small organic molecule light emitting diodes.

The invention discloses a water-alcohol-soluble pyridinium salt based on small organic molecules, and a preparation method and an application thereof. According to the material, pyridinium is adopted as a frame; and through the changes upon connection units, molecular weight, pi-conjugacy and electrophilicity of the material can be adjusted. The chemical structure of the material is shown on the right. The preparation method comprises the steps that: p-xylene is adopted as an initial reaction raw material; a series of simple reactions are carried out; and under the effect of thionyl chloride, ring-closure salt-formation is carried out, such that a target compound is obtained. The material provided by the invention has a single structure, a definite molecular weight, good dissolubility, and good film forming property. The material can be used in modification layers of cathodes or anodes of organic photoelectric devices such as polymer electroluminescent diodes, organic solar cells, and the like.

The invention belongs to the technical field of intelligent materials, and discloses a multi-stimulus-response organic small-molecular luminescent material, and preparation and application thereof. By utilizing the dual-fluorescence characteristics of phenothiazine derivatives, a series of luminescent materials are designed and synthesized; and external stimulus effects are utilized to regulate the reciprocal transformation of two conformations, thereby providing a simple feasible effective design strategy for the stimulus-response luminescent material. According to the preparation method, phenothiazine, which is used as a main reaction raw material, is subjected to a series of simple reactions to obtain various target products. The obtained product has the advantages of definite molecular weight, single structure, lower glass transition temperature and greatly higher stimulus-response sensitivity. The stimulus-response principle of the material is conversion between two different conformations instead of the influence of the intermolecular acting force and accumulation mode, so that the material has the multi-stimulus-response characteristic, and is applicable to sensors of force, temperature, pH and the like.

The invention provides an organic small-molecule luminescent material and an organic electroluminescent device. The organic small-molecule luminescent material provided by the invention is obtained bycoupling a novel acridine donor unit 10H-spiro[acridine-9,2'-adamantane] with a receptor unit. The organic small-molecule luminescent material has a single structure and a determined molecular weight, is convenient for purification and high in multiple synthetic reproducibility, and has low sublimation temperature and high decomposition temperature and stable film morphology; since the non-aromatic rigid structure adamantine is used as a donor part structure, the organic small-molecule luminescent material has a high photoluminescent quantum yield in the film state; when the organic small-molecule luminescent material is applied to the organic electroluminescent device, the problem of low efficiency of the device caused by serious non-radiative attenuation due to configuration relaxationof an excited state molecule can be effectively solved.

The invention belongs to the technical field of photoelectric materials and particularly relates to an organic small molecular material based on spiro thioxanthene and an organic photoelectric device using the material as a light emitting layer. By using spiro thioxanthene as a framework unit, the organic small molecular material can be used for obtaining a target compound by virtue of friedel craft reaction and Ullmann reaction. The material is single in structure and certain in molecular weight and has good solubility and film forming property in common solvents. The spiro structure of the material can adjust the accumulation mode of molecules, so that an exciplex is effectively prevented from emitting light, therefore, the material is of profound significance in development of high-effect devices. The photoelectric device using the material as the light emitting layer has a good light emitting performance and can be applied to organic small molecular light emitting diodes.

The invention relates to a D (A-Ar) 2 type organic photoelectric compound based on carbazole eleven-membered fused ring planar nucleus and a preparation method and application thereof. The preparationmethod comprises the steps that ternary carbazole central ring units are coupled with thiophene and benzothiophene derivatives through ring closing reaction and coupling reaction to obtain derivatives of a carbazole group-containing eleven-membered fused ring conjugated planar structure aromatic compound and D (A-Ar) 2 type linear organic small molecule photovoltaic material containing carbazolemulti-membered fused ring central nucleus. The derivatives of the eleven-membered large fused ring conjugated planar structure compound and the corresponding D (A-Ar) 2 type linear organic small molecule photovoltaic material have high thermal stability and high hole mobility. Through the development and application of the materials, high-efficiency organic solar cells, organic electroluminescentdiodes, organic field effect transistors and organic near-infrared photoelectric detector materials are obtained.

The invention discloses a thermotropic delayed fluorescence material, which has a general molecular formula as shown in a formula I. The formula I is shown in the description. An organic light-emitting device prepared by utilizing the material has the characteristics that the power efficiency and the external quantum efficiency of the device can be remarkably improved, the service life of a blue light device is prolonged, a material synthesis and a purification method is simple and suitable for large-scale production and the like, and is an ideal choice as an organic light-emitting device light-emitting material. The application of the organic light-emitting diode material used as a carrier transport material or independently used as a main material in a luminescent material or a luminescent layer is also within a protection range.

The invention discloses an organic small molecular photoelectric functional material adopting 3-benzoylpyridine as a receptor unit, which mainly depends on hydrogen-bond interaction of nitrogen in benzoylpyridine, can effectively avoid the deficiency of low radiation rate caused by large torsion angle, thereby improving the horizontal molecular orientation, and realizing the structure simplification of devices and performance of the devices and prolonging the service life. By controlling the type and size of a donor connecting unit, the intrinsic characteristics of the material such as a molecular weight, a conjugated length, charge transfer and the like can be effectively adjusted. The invention also discloses a preparation method and application of the organic small molecular photoelectric functional material. The organic small molecular photoelectric functional material adopting 3-benzoylpyridine as the receptor unit has the advantages that the radiation rate coefficient is high, the quantum efficiency is high, the current carrier transport performance is high, the color is adjustable when being used as a luminescent layer of an organic electroluminescent device, high efficiencyand stability can be realized, the service life is long, and the like.

The invention discloses a biceptor organic luminescence small molecule material. Carbonyl is connected with sulfuryl by a benzene ring to form a novel receptor framework unit; one benzene ring is connected to each of two sides of the novel receptor framework unit so as to add reactive sites. The invention also discloses a preparation method and application of the biceptor organic luminescence small molecule material. The luminescence material connected with a receptor can realize a transfer effect of intramolecular charges; with a bipolar transmission characteristic of the luminescence material, the unbalance of a unipolar luminescent material charge carrier is reduced, and the structure of a device is simplified and the performance of the device is improved. The biceptor organic luminescence small molecule material disclosed by the invention is simple in preparation; various target products are obtained by a series of simple reactions. The material has the advantages of determined molecular weight, single structure, high decomposition temperature and lower sublimation temperature, and can be applied to an organic light-emitting diode.

The invention discloses a self-host organic light-emitting small molecule material connected with a sulfur-containing non-conjugated unit by a carbonyl group, and increasing reaction sites by connecting benzene rings on two sides separately. The invention further discloses a preparation method and application of the self-host organic light-emitting small molecule material. The self-host organic light-emitting small molecule material disclosed by the invention realizes the intramolecular charge transfer function, and the sulfur-containing non-conjugate unit owned by the self-host organic light-emitting small molecule material can act as a part of a host to show high device performances in a simplified device structure. The self-host organic light-emitting small molecule material disclosed by the invention is simple in preparation method, and various target products are obtained through a series of simple reactions. Furthermore, the material disclosed by the invention is determined in molecular weight, single in structure, very high in decomposition temperature and lower in sublimation temperature, thereby being easily sublimated into a high-purity light-emitting material.

The invention discloses tetradentate cyclometalated platinum (II) and palladium (II) complex phosphorescent materials containing a five-membered heteroaryl ring. The tetradentate cyclometalated platinum (II) or palladium (II) phosphorescent material is shown as formula 1 or formula 2 (shown in the description), wherein M1 or M2 is respectively platinum or palladium, R1, R2, R3, R4, R5, R6, R7 or R8 is respectively hydrogen, deuterium, C1-C6 alkyl, C1-C6 alkoxy, halogen, amino, C6-C20 aryl or C6-C20 heteroaryl, or two carbons neighboring a heteroaryl ring are connected to a cyclosubstituent, n1-n8 represent the number of substituents, n1 or n5 is respectively 1 to 2, and n2, n3, n4, n6, n7 or n8 is respectively 1 to 3. The phosphorescent materials disclosed by the invention can effectively increase the chemical stability and thermostability of molecules, have good luminescent property, and can be used in organic light-emitting devices.

The invention discloses a method for detecting avanafil and related impurities thereof, ammonium formate-acetonitrile is taken as a mobile phase, and avanafil is analyzed and identified by adopting an analysis method of UPLC (Ultra Performance Liquid Chromatography) compatible with LC-MS (Liquid Chromatography-Mass Spectrometry), so that avanafil synthesized by adopting a specific synthesis route and related impurities thereof can be effectively separated; and a new method is provided for key process parameter control and quality control of the avanafil bulk drug.