WO2004067519A1 - ナイルレッド系赤色発光化合物、ナイルレッド系赤色発光化合物の製造方法、および発光素子 - Google Patents
ナイルレッド系赤色発光化合物、ナイルレッド系赤色発光化合物の製造方法、および発光素子 Download PDFInfo
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- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H05B33/00—Electroluminescent light sources
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- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
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- C07D265/28—1,4-Oxazines; Hydrogenated 1,4-oxazines
- C07D265/34—1,4-Oxazines; Hydrogenated 1,4-oxazines condensed with carbocyclic rings
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- C07D265/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one oxygen atom as the only ring hetero atoms
- C07D265/28—1,4-Oxazines; Hydrogenated 1,4-oxazines
- C07D265/34—1,4-Oxazines; Hydrogenated 1,4-oxazines condensed with carbocyclic rings
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- H10K85/60—Organic compounds having low molecular weight
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- H10K85/656—Aromatic compounds comprising a hetero atom comprising two or more different heteroatoms per ring
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- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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Definitions
- TECHNICAL FIELD The present invention relates to a red light emitting compound, a method for producing the same, and a light emitting device.
- TECHNICAL FIELD The present invention relates to a Nile red-based red light emitting compound capable of emitting red light close to crimson with high brightness when electric energy is applied, a novel production method thereof, and a light emitting device using the same.
- various organic compounds have been proposed as an organic electroluminescent device (also referred to as an organic electroluminescent device or an organic EL device).
- an organic compound that can emit red light has high emission luminance, and is stable against heat and light has not yet been developed.
- An object of the present invention is to provide an organic red light-emitting compound which has high emission luminance, and which can emit red light having an X coordinate exceeding 0.63 in chromaticity of C or CIE, and which is stable against heat and light,
- An object of the present invention is to provide a light emitting device using the production method and the organic red light emitting compound. Disclosure of the invention
- a first invention for solving the above-mentioned problem is a Nile red-based red light emitting compound having a structure represented by the following general formula (1).
- R 1 is a lower alkyl group of from 1 to 5 carbon, or shows a benzyl group, also, R 'one cooperates with R 3 CH 2 CH 2 - CR 6 R 7 i (where I The carbon in CR 6 R 7 is bonded to a benzene ring, R 6 and R 7 are a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms, or a benzyl group, and R 6 and R 7 are the same. Or may be different.)
- R 2 is a lower alkyl group of from 1 to 5 carbon, or shows a benzyl group, also, R 2 one in cooperation with the R 5 CH 2 CH 2 - CR 8 R 9 - ( However, _CR 8 R 9 one Is bonded to the benzene ring, R 8 and R 9 represent a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms, or a benzyl group, and R 8 and R 9 may be the same or different. Is also good.)
- R 3 represents a hydrogen atom, the bond formed in conjunction with R 1 (_CH 2 CH 2 - CR 6 R 7 -), or becomes formed include adjacent benzene ring in cooperation with R 4 Shows a naphthalene ring.
- R 4 represents a hydrogen atom or a naphthalene ring formed including an adjacent benzene ring in cooperation with R 3 .
- R 5 is, the bond formed jointly hydrogen atom, or said R 2 (one CH 2 CH 2 -C 8 R 9 -) shows a.
- X represents a cyano group or a fluorinated hydrocarbon group.
- Another means for solving the above-mentioned problem is to produce a halogenated Nile red-based intermediate represented by General formula (3) by reacting a Nile red-based dye compound represented by General formula (2) with a halogenating agent.
- R 1 , R 2 , R 3 , R 4 and R 5 have the same meaning as described above (
- FIG. 1 is an explanatory diagram showing a light emitting element as an example according to the present invention.
- FIG. 2 is an explanatory view showing a light emitting element as another example according to the present invention.
- FIG. 3 is an explanatory diagram showing a light emitting element as another example according to the present invention.
- FIG. 4 is an explanatory view showing a light emitting element as still another example according to the present invention.
- FIG. 5 is a chart showing an IR chart of a brominated nile red-based intermediate synthesized in Example 1.
- FIG. 6 is a chart showing an NMR chart of a brominated nile red-based intermediate synthesized in Example 1.
- FIG. 7 shows a fluorescent spectrum of a nitrile red luminescent compound having a trifluoromethyl group introduced therein, which was synthesized in Example 1.
- FIG. 8 is an NMR chart of the nile red-based red light emitting compound synthesized in Example 1.
- FIG. 9 is an IR chart of the nile red-based red light-emitting compound synthesized in Example 1.
- FIG. 5 is a chart showing an IR chart of a brominated nile red-based intermediate synthesized in Example 1.
- FIG. 6 is a chart showing an NMR chart of a brominated nile red-based
- FIG. 10 is a fluorescence spectrum chart of a nile red-based red light-emitting compound into which a cyano group has been introduced, which was synthesized in Example 2.
- FIG. 11 is an NMR chart of the nile red-based red light emitting compound synthesized in Example 2.
- FIG. 12 is an IR chart of a nile red-based red light emitting compound synthesized in Example 2.
- R ′ may be a lower alkyl group having 1 to 5 carbon atoms or a benzyl group.
- the lower alkyl group represented by R 1 include a methyl group, an ethyl group, a propyl group, a butyl group and a pentyl group.
- R 2 may be a lower alkyl group having 1 to 5 carbon atoms or a benzyl group.
- the lower alkyl group represented by R 2 is the same as in R 1 above.
- R 1 and R 2 may be the same lower alkyl group or different lower alkyl groups.
- R 1 is one CH 2 CH cooperates with R 3 2 - CR 6 R 7 - (where carbon is bonded to the benzene ring in one CR 6 R 7 one, R 6 and R 7 are a hydrogen atom, charcoal And represents a lower alkyl group having a prime number of 1 to 5 or a benzyl group, and R 6 and R 7 may be the same or different.
- preferred NR 1 R 2 include getylamino, di-n-propylamino, di-i-propylamino, butyl and the like. Can be.
- R 2 is one CH 2 CH jointly with R 5 2 - CR 8 R (Note that one C
- R 8 R 9 The carbon at R 8 R 9 — is bonded to the benzene ring, R 8 and R 9 represent a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms, or a benzyl group, and R 8 and R 9 are the same. Or different. ) Is formed.
- R 1 is one CH 2 CH 2 -CR 6 R 7 in cooperation with R 3
- R 2 is one CH 2 CH 2 -CR 8 R 9 — in cooperation with R 5
- Formula (1) can be represented by the following general formula (4).
- R 4 , R 6 , R 7 , R 8 , R 9 and X have the same meaning as described above.
- R 3 and R 4 are both hydrogen atoms, or can form a naphthalene ring together with an adjacent benzene ring.
- a red light-emitting compound in which R 3 and R 4 together form a naphthalene ring containing an adjacent benzene ring is represented by the general formula (5).
- R 1, R 2 ⁇ Pi X in the general formula (5) as X in c The general formula have the same meanings as defined above (1), a fluorinated hydrocarbon group or Shiano group that elevation gel it can.
- Examples of the fluorinated hydrocarbon group include groups obtained by substituting one or more hydrogen atoms in a hydrocarbon group with a fluorine atom, and specifically include a saturated group having 1 to 10 carbon atoms. And a lower fluorinated hydrocarbon group in which one or more hydrogen atoms in an unsaturated hydrocarbon group are substituted with a fluorine atom. More specifically, preferred examples of the fluorinated hydrocarbon group have 1 to 10 carbon atoms, and preferably have 1 to 10 carbon atoms. Examples thereof include a fluorinated lower saturated hydrocarbon group obtained by substituting one or more hydrogen atoms in a 1 to 5 saturated hydrocarbon group with a fluorine atom, and more preferably a saturated hydrocarbon group having 1 to 5 carbon atoms.
- a perfluoroalkyl group in which all hydrogen atoms in a hydrogen group are substituted with fluorine atoms can be given.
- the fluorinated lower saturated hydrocarbon group one CH 2 F, -CHF 2, -CF 3, one CH 2 CF 3 , one CHF CF 3, -CF 2 CF 3, -CH 2 CH 2 CF 3 , — CH 2 CHFCF 3, one CH 2 CF 2 CF a, - CH 2 FC F 2 CF 3 and the like.
- Examples of the perfluoroalkyl group include CF 3 , —CF 2 CF 3, and —CF 2 (CF 2 ) n CF 3 (where n is an integer of 1 to 3).
- CF a, —CF 2 CF 3 is preferred.
- the cyano group is shown as one CN.
- the red light-emitting compound represented by the general formula (1) is an NR 1 R 2 force S electron-donating group, and the fluorohydrocarbon group or the cyano group represented by X is an electron-withdrawing group. Since the ⁇ -electron cloud in the Nile Red skeleton spreads, it is presumed that red light emission becomes easy with a small amount of energy.
- the novel nitrile red light emitting compound according to the present invention is characterized by a structure in which an electron-donating group R 1 - ⁇ -R 2 donates an electron to a ⁇ electron cloud in a Nile red skeleton.
- the red light-emitting compound represented by the general formula (1) can be produced as follows. That is, the nitrile compound represented by the general formula (2) is reacted with a halogenating agent.
- R 1 , R 2 , R 3 , R 4 and R 5 have the same meaning as described above.
- the halogenating agent is not particularly limited as long as it can replace hydrogen on the aromatic ring with halogen. Specific examples of the halogenating agent include sulfuryl chloride and phosphorus pentachloride when hydrogen on the aromatic ring is replaced with chlorine.
- N-halosuccinic acid imide such as N-bromosuccinic acid imid
- dialkyl halomalonate such as dialkyl bromomalate
- the nitrile compound represented by the formula (2) and the halogenating agent easily react with each other by heating in a solvent, which includes acetic anhydride, acetic acid, and the number of carbon atoms.
- Acid anhydrides, aromatic solvents such as benzene and toluene, chlorinated solvents such as dichloromethane, chloroform, carbon tetrachloride, etc., and dioxane which are not more than 5 can be used.
- the temperature is 250 ° C., preferably 20 ° C. to 170 ° C.
- the halogenation represented by the general formula (3) is carried out by purifying and separating according to a conventional method. It can be obtained Rure' de type intermediates. However, R 1 , R 2 , R 3 , R 4 and R 5 have the same meaning as described above.
- H al represents a halogen atom.
- the halogenated nitrile-based intermediate represented by the general formula (3) is obtained by substituting the halogen atom with a halogenated hydrocarbon group or a cyano group. Converted to a red light emitting compound.
- the introduction of the halogenated hydrocarbon group into the halogenated nitrile-based intermediate represented by the general formula (3) is carried out by reacting a halogenated hydrocarbon metal reagent generated in the reaction system, for example, a perfluoroalkyl copper reagent, A method of generating a perfluoroalkyl radical and reacting it with the halogenated nitrile intermediate, a method of adding a perfluoroalkyl metal reagent such as a Grignard reagent, a lithium reagent, or an aluminum reagent to a carbonyl compound and dehydrating the same. Can be mentioned.
- a halogenated hydrocarbon metal reagent generated in the reaction system for example, a perfluoroalkyl copper reagent, A method of generating a perfluoroalkyl radical and reacting it with the halogenated nitrile intermediate, a method of adding a perfluoroalkyl metal reagent such as a Grignard
- the halogen atom Hal in the halogenated nitrile-based intermediate may be any of iodine, bromine, fluorine and chlorine.
- iodine and bromine are preferred from the standpoint of yield and the yield is high, so they are recommended.
- the reaction method is preferable from the viewpoint of handling and good yield.
- the introduction of a cyano group into the halogenated nitrile intermediate represented by the general formula (3) can be suitably performed by a method of reacting a transition metal cyanide with the halogenated nitrile intermediate.
- the cyanation reaction is usually carried out in a polar non-proton solvent such as aromatic amines such as pyridine and quinoline, dimethylformamide (DMF), N-methylpyrrolidone and hexamethylphosphoric triamide (HMPA). It is preferably performed.
- FIG. 1 is an explanatory diagram showing a cross-sectional structure of a light emitting device that is also a single-layer organic EL device. As shown in FIG.
- the light emitting element A is formed by laminating a light emitting layer 3 containing a light emitting material and an electrode layer 4 in this order on a substrate 1 on which a transparent electrode 2 is formed.
- the light emitting device shown in FIG. 1 has a transparent electrode 2 and an electrode layer 4 when the light emitting layer 3 contains the Nile red light emitting compound, the blue light emitting compound and the green light emitting compound according to the present invention in good balance. When a current is applied to, it emits white light.
- the total content and the respective content ratios of the Nile red-based red light-emitting compound, the blue light-emitting compound and the green light-emitting compound according to the present invention, which are contained in the light-emitting layer 3 for emitting white light are as follows. It differs depending on the type, and is specifically determined appropriately according to the type of each light emitting compound. If the light emitting element is intended to emit red light, the light emitting layer 3 preferably contains the Nile red light emitting compound according to the present invention. Further, if it is intended to emit light of any color other than white and red with this light emitting element, the red light emission according to the present invention may be used.
- the total content of the compound, the blue light emitting compound, and the green light emitting compound and the respective content ratios may be appropriately changed.
- the mixing ratio of the Nile red-based red light-emitting compound, the blue light-emitting compound, and the green light-emitting compound in the light-emitting layer is usually 5 to 200 by weight.
- the blue light emitting compound include a diphenylvinylbiphenol-based blue light-emitting compound and a stilbene-based blue light-emitting compound.
- suitable diphenylvinylbirubinol-based blue light-emitting compounds include DPVBi represented by the general formula (10).
- Examples of the green light emitting compound include a coumarin green light emitting compound, an indophenol green light emitting compound, and an indigo green light emitting compound, and include a coumarin green light emitting compound represented by the general formula (11). It is suitable. (11)
- the light-emitting element A shown in FIG. 1 can be mounted on a wall or a ceiling, for example, when mounted on a wall or a ceiling to form a large-area white light-emitting element and a large-area ceiling white light-emitting element.
- a planar light-emitting lighting device can be provided.
- this light emitting element can be used as a surface light source instead of a point light source such as a conventional linear light source such as a fluorescent lamp or a bulb.
- a wall surface, a ceiling surface, or a floor surface of a living room, an office room, a vehicle room, or the like can emit or illuminate as a surface light source using the light emitting element according to the present invention.
- the light-emitting element A can be used as a backlight for a display screen of a combi- ter, a display screen of a mobile phone, a numeric display screen of a cash register, and the like.
- the light emitting element A can be used as various light sources such as direct lighting and indirect lighting, and can be made to emit light at night to provide good visibility, an advertising device, a road sign device, and the like. It can also be used as a light source for light emitting boards, and also for brake lights and the like in vehicles such as automobiles. Moreover, since the light-emitting element A has a red-light-emitting compound having a specific chemical structure in the light-emitting layer, the light-emitting element A has a long light-emitting life. Therefore, the light emitting element A can be used as a light source that emits light for a long time.
- the light-emitting element A is a tubular light-emitting body in which a cylindrical substrate 1 and a transparent electrode 2, a light-emitting layer 3, and an electrode layer 4 are laminated in this order on the inner surface side of the substrate 1.
- the substrate 1 a known substrate can be adopted as long as the transparent electrode 2 can be formed on the surface thereof.
- the substrate 1 examples include a glass substrate, a plastic sheet, a ceramic, and a metal plate having an insulating surface, such as an insulating coating layer formed on the surface.
- the light-emitting element containing the blue light-emitting compound, the green light-emitting compound, and the red light-emitting compound according to the present invention in the light-emitting layer emits white light on the side opposite to the substrate 1. It is a single-sided illumination device that can irradiate. Further, when the substrate 1 is transparent, it is a double-sided illumination device capable of irradiating white light from the surface of the light emitting element on the substrate 1 side and the opposite side.
- the transparent electrode 2 various materials can be employed as long as they have a large work function and are transparent, and can act as an anode by applying a voltage to inject holes into the light emitting layer 3. .
- the transparent electrode 2 is formed on the substrate 1 by chemical vapor deposition, spray pyrolysis, vacuum evaporation, electron beam evaporation, sputtering, ion beam sputtering, or ion beam sputtering.
- the light-emitting layer 3 contains the Nile red light emitting compound according to the present invention when emitting red light, and the blue light emitting compound, green light emitting compound and the Nile red light emitting compound according to the present invention when emitting white light. It is a layer containing.
- the light-emitting layer 3 is formed by dispersing a Nile red light emitting compound according to the present invention, or a Nile red light emitting compound, a green light emitting compound, and a Nile red light emitting compound according to the present invention in a polymer.
- the Nile red light emitting compound according to the present invention, or the blue light emitting compound, the green light emitting compound, and the Nile red light emitting compound according to the present invention are deposited on the transparent electrode 2. It can be formed as a deposited film.
- polymer in the polymer film examples include polyvinyl carbazole, poly (3-alkylenethiophene), polyimide containing arylamine, polyfluorin, polyphenylenevinylene, poly- ⁇ -methynolestyrene, Vininole force Pazol / ⁇ -methylstyrene copolymer. Preferred among these are polyvull rubazol.
- the content of the red light-emitting compound of the present invention in the polymer film, or the total content of the blue light-emitting compound, the green light-emitting compound and the red light-emitting compound of the present invention is usually 0.1%. 0 to 2% by weight, preferably 0.05 to 0.5% by weight. / 0 .
- the thickness of the polymer film is usually 30 to 500 nm, preferably 100 to 300 nm. If the thickness of the polymer film is too thin, the amount of emitted light may be insufficient. If the thickness of the film is too large, the driving voltage may be too high, which is not preferable.Furthermore, the film may lack flexibility when it is formed into a planar body, a tubular body, a curved body, or an annular body.
- the polymer film is a solution obtained by dissolving the polymer and the nile red light emitting compound according to the present invention, or the blue light emitting compound, the green light emitting compound, and the nile red light emitting compound according to the present invention in an appropriate solvent. It can be formed by a coating method, for example, a spin casting method, a coating method, a dipping method, or the like.
- the thickness of the vapor-deposited film is generally 0.1 to 100 nm, although it differs depending on the layer structure of the light-emitting layer. If the thickness of the vapor-deposited film is too small or too large, the same problem as the above-described polymer film may occur.
- the electrode layer 4 is made of a material having a small work function, and can be formed of, for example, a simple metal or a metal alloy such as MgAg, an aluminum alloy, or calcium metal.
- the preferred electrode layer 4 is an alloy electrode of aluminum and a small amount of lithium.
- the electrode layer 4 can be easily formed, for example, on the surface including the light emitting layer 3 formed on the substrate 1 by a vapor deposition technique. Regardless of which of the coating method and the vapor deposition method is used to form the light emitting layer, it is preferable to interpose a buffer layer between the electrode layer and the light emitting layer.
- Examples of materials that can form the buffer layer include: alkali metal compounds such as lithium fluoride; alkaline earth metal compounds such as magnesium fluoride; oxides such as aluminum oxide; Bis-powered rubazo-norebifeniru (Cz-TPD) can be mentioned.
- alkali metal compounds such as lithium fluoride
- alkaline earth metal compounds such as magnesium fluoride
- oxides such as aluminum oxide
- Bis-powered rubazo-norebifeniru (Cz-TPD) can be mentioned.
- m-MTDATA (4, 4 ', 4''-tris (3-methylphenylphenyl) Amino) Triphenylami
- examples include phthalocyanine, polyaniline, polythiophene derivatives, and inorganic oxides such as molybdenum oxide, ruthenium oxide, vanadium oxide, and lithium fluoride.
- FIG. 2 is an explanatory diagram showing a cross section of a multilayer organic EL device which is a light emitting device.
- the light-emitting element B has a structure in which a transparent electrode 2, a hole-transport layer 5, light-emitting layers 3a and 3b, an electron-transport layer 6, and an electrode layer 4 are laminated in this order on the surface of a substrate 1. Become.
- the substrate 1, the transparent electrode 2, and the electrode layer 4 are the same as those in the light emitting device A shown in FIG.
- the light emitting layer in the light emitting element B shown in FIG. 2 includes a light emitting layer 3a and a light emitting layer 3b, and the light emitting layer 3a is a vapor-deposited film formed by vapor-depositing a light-emitting compound.
- the light emitting layer 3b is a DPVB i layer.
- the DPVB i layer has a function as a host material.
- Examples of the hole transporting substance contained in the hole transporting layer 5 include triphenylamine-based compounds such as N, N'-diphenyl N, N'-di (m-tolyl) -benzidine (TPD), and a — Examples include hydrazone compounds, stilbene compounds, heterocyclic compounds, and ⁇ -electron starburst hole transport materials such as NPD.
- Examples of the electron-transporting substance contained in the electron-transporting layer 6 include, for example, 2- (4-tert-butylphenyl) -15- (4-biphenyl) 1-1,3,4-oxaziazo Oxadiazole derivatives such as Examples thereof include 1-naphthyl) 1-1,3,4-oxadiazole and 2,5-bis (5,1-tert-butyl-2′-benzoxazolyl) thiophene.
- a metal complex material such as a quinolinol aluminum complex (Alq 3) or a benzoquinolinol beryllium complex (Bebq 2) can be suitably used.
- Bebq 2 quinolinol aluminum complex
- Bebq 2 benzoquinolinol beryllium complex
- the electron transport layer 6 contains A 1 q 3.
- the thickness of each layer is the same as in a conventionally known multilayer organic EL device.
- the light emitting element B shown in FIG. 2 operates and emits light similarly to the light emitting element A shown in FIG. Therefore, the light emitting device B shown in FIG. 2 has the same use as the light emitting device A shown in FIG.
- FIG. 3 shows a third example of the light emitting device according to the present invention.
- FIG. 3 is an explanatory diagram showing a cross section of a light emitting device which is a multilayer organic EL device.
- FIG. 3 has a structure in which a transparent electrode 2, a hole transport layer 5, a light-emitting layer 3, an electron transport layer 8, and an electrode layer 4 are laminated in this order on the surface of a substrate 1.
- the light emitting element C shown in FIG. 3 is the same as the light emitting element B.
- FIG. 4 shows another example of the light emitting device.
- the light-emitting device D shown in FIG. 4 is formed by laminating a substrate 1, an electrode 2, a hole transport layer 5, a light-emitting layer 3, and an electrode layer 4 in this order.
- FIGS. 1 In addition to the light emitting elements shown in FIGS.
- a hole transporting layer containing a hole transporting substance is provided between an anode which is a transparent electrode formed on a substrate and a cathode which is an electrode layer.
- a two-layer organic low-molecular-weight light-emitting device for example, a hole transporting device between an anode and a cathode
- a two-layer dye-doped light-emitting element comprising a light-emitting layer containing a light-emitting layer containing a nile red-based red light-emitting compound according to the present invention and a host dye as a guest dye), a cathode and a cathode.
- a two-layer organic layer in which a hole transporting layer containing a hole transporting substance and an electron transporting luminescent layer obtained by co-evaporating the red light emitting compound and the electron transporting substance according to the present invention are laminated.
- a light emitting element for example, a hole transporting layer and an electron transporting light emitting layer containing the nile red-based red light emitting compound according to the present invention and a host dye as a guest dye
- a two-layer dye-doped organic light-emitting device a hole transport layer, a light-emitting layer containing a nile red-based red light-emitting compound according to the present invention, and an electron transport layer between an anode and a cathode.
- Layered organic light emitting device Can be mentioned.
- the electron-transporting light-emitting layer in this light-emitting device usually comprises 50 to 80% of polyvinyl carbazole (PVK), 5 to 40% of an electron-transporting light-emitting agent, When formed with the red light emitting compound 0.01 to 20% (by weight), blue light emission occurs with high luminance.
- PVK polyvinyl carbazole
- the light emitting layer preferably contains rubrene as a photosensitizer, and particularly preferably contains rubrene and A 1 q 3.
- a red light emitting element using the red light emitting compound according to the present invention, or a white light emitting element using the blue light emitting compound, the green light emitting compound and the red light emitting compound according to the present invention are generally, for example, DC driven. It can be used as a organic EL device of a pulse type and an organic EL device of a pulse drive type and an AC drive type.
- the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples.
- the brominated nitrile intermediate represented by the general formula (6) can also be synthesized by reacting a nitrile with N-bromosuccinic acid imid.
- the N-bromosuccinic acid imid has an allylic position. It is a suitable brominating agent capable of replacing hydrogen with bromine in a large yield.
- an example of producing a brominated Nile red-based intermediate represented by the general formula (6) using N-bromosuccinic acid imide will be described. In a 200 ml flask, 10.0 g (31.4 mmo1) of Nile Red and 6.20 g (34.8 mmo1) of N-bromoconodic acid imide.
- reaction solution was cooled to room temperature, and 20 ml of water and 15 ml of toluene were added to the reaction product.
- the obtained mixture was filtered under reduced pressure, and insoluble matters such as copper bromide were separated by filtration. Then, the organic phase was separated and washed with 30 ml of water. The organic phase was dried over anhydrous sodium sulfate, filtered, and then concentrated by an evaporator.
- the obtained crude product was purified by silica gel column chromatography to obtain 1.39 g of a trifluoromethylated product. The yield was 72%.
- the obtained solid was purified by a sublimation purification method (manufactured by ULVAC-RIKO Co., Ltd., TR S-1 SS, high-temperature section at 190 ° C, low-temperature section at 125 ° C, 0.5 Pa). Green crystals were obtained. The melting point of the crystals was 234 to 2336C. Fluorescence spectrum of this product (F-4500 spectrofluorometer, excitation wavelength 365 nm, solvent dioxane, concentration 0.05% by weight), the maximum emission wavelength was 67.2 nm. Was Fig. 7 shows the fluorescence spectrum. The NMR and IR charts of this product are shown in FIG. 8 and FIG. The elemental analysis values of the obtained dark green crystal were as follows.
- the obtained dark green crystal is a Nile red-based red light emitting compound having the structure represented by the following general formula (7). If there is, it was identified.
- the Nile red-based red light-emitting compound obtained in this example shows fluorescence emission at 600 to 700 nm.
- the organic phase was washed twice with saturated saline (10 ml / time), dried over anhydrous sodium sulfate, filtered, and the solvent was distilled off under reduced pressure using an evaporator.
- the concentrated crude product was purified by silica gel chromatography to obtain 0.776 g of a cyanated product as crude crystals. The yield was 88%.
- the crude crystals were purified by a sublimation purification method (TRS-1 SS, high temperature part 250 ° C, low temperature part 150 ° C, 0.5 Pa) manufactured by ULVAC-RIKO, Ltd. Got.
- the melting point of the crystals was 263-265 ° C.
- the present invention is a novel substance that can emit red light having a peak wavelength closer to crimson with high luminance, which has not been obtained before, and is stable against heat and light.
- the present invention can provide an efficient Nile red-based red light-emitting compound.
- it is possible to provide a novel nitrile-based red light-emitting compound capable of producing an element capable of emitting white light.
- it is possible to provide an industrial production method for producing the novel Nile red-based red light emitting compound.
- a light-emitting element that emits crimson light by having a light-emitting layer containing the novel nile red-based red light-emitting compound;
- a light-emitting element that emits white light can be provided.
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Electroluminescent Light Sources (AREA)
- Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04705912A EP1598344A4 (en) | 2003-01-31 | 2004-01-28 | NIL RED LIGHT EMITTING COMPOUND, PROCESS FOR PRODUCING RED NIL LIGHT EMITTING COMPOUND AND LIGHT EMITTING DEVICE |
US10/543,882 US20060252933A1 (en) | 2003-01-31 | 2004-01-28 | Nile red light-emitting compound, method for producing nile red light-emitting compound, and light-emitting device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-025188 | 2003-01-31 | ||
JP2003025188A JP2004262765A (ja) | 2003-01-31 | 2003-01-31 | ナイルレッド系赤色発光化合物、その製造方法及びそれを利用した発光素子 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004067519A1 true WO2004067519A1 (ja) | 2004-08-12 |
Family
ID=32820785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/000771 WO2004067519A1 (ja) | 2003-01-31 | 2004-01-28 | ナイルレッド系赤色発光化合物、ナイルレッド系赤色発光化合物の製造方法、および発光素子 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20060252933A1 (ja) |
EP (1) | EP1598344A4 (ja) |
JP (1) | JP2004262765A (ja) |
KR (1) | KR20050095627A (ja) |
CN (1) | CN1735602A (ja) |
TW (1) | TW200427674A (ja) |
WO (1) | WO2004067519A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006051848A1 (ja) * | 2004-11-12 | 2006-05-18 | Hirose Engineering Co., Ltd. | プラスチック成形体及び照射光波長の予測方法 |
WO2006101009A1 (ja) * | 2005-03-18 | 2006-09-28 | Hirose Engineering Co., Ltd. | ナイルレッド系赤色発光化合物、及び発光素子 |
WO2007046247A1 (ja) * | 2005-10-18 | 2007-04-26 | Hirose Engineering Co., Ltd. | ナイルレッド系赤色発光化合物、発光素子及びプラスチック成形体 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0782495A (ja) * | 1993-09-16 | 1995-03-28 | Nippon Oil & Fats Co Ltd | フルオロアルキル基含有ナイルレッド化合物及びその製造方法 |
JP2000080088A (ja) * | 1998-06-26 | 2000-03-21 | Fuji Photo Film Co Ltd | エレクトロルミネツセンス素子及び環状アジン化合物 |
JP2001261677A (ja) * | 2000-03-14 | 2001-09-26 | Fuji Photo Film Co Ltd | 発光素子材料、それを使用した発光素子及び環状アジン化合物 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU1539198A1 (ru) * | 1988-04-12 | 1990-01-30 | Институт физико-органической химии АН БССР | 9-Диэтиламино-6-циано-5Н-бензо[ @ ]феноксазин-5-он в качестве регистрирующей среды дл электроразр дного метода визуализации |
US6379823B1 (en) * | 1997-10-28 | 2002-04-30 | Fuji Photo Film Co., Ltd. | Electroluminescence device, cyclic azine compound and production process of cyclic azine dye |
-
2003
- 2003-01-31 JP JP2003025188A patent/JP2004262765A/ja not_active Abandoned
-
2004
- 2004-01-28 WO PCT/JP2004/000771 patent/WO2004067519A1/ja not_active Application Discontinuation
- 2004-01-28 KR KR1020057013784A patent/KR20050095627A/ko not_active Application Discontinuation
- 2004-01-28 CN CNA2004800012234A patent/CN1735602A/zh active Pending
- 2004-01-28 US US10/543,882 patent/US20060252933A1/en not_active Abandoned
- 2004-01-28 EP EP04705912A patent/EP1598344A4/en not_active Withdrawn
- 2004-01-30 TW TW093102225A patent/TW200427674A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0782495A (ja) * | 1993-09-16 | 1995-03-28 | Nippon Oil & Fats Co Ltd | フルオロアルキル基含有ナイルレッド化合物及びその製造方法 |
JP2000080088A (ja) * | 1998-06-26 | 2000-03-21 | Fuji Photo Film Co Ltd | エレクトロルミネツセンス素子及び環状アジン化合物 |
JP2001261677A (ja) * | 2000-03-14 | 2001-09-26 | Fuji Photo Film Co Ltd | 発光素子材料、それを使用した発光素子及び環状アジン化合物 |
Non-Patent Citations (3)
Title |
---|
MATSUI M. ET AL: "Perfluoroalkylation of Quinolinones and Phenoxazones with Bis(perfluoroalkanoyl) Peroxides", DYES AND PIGMENTS, vol. 27, no. 2, 1995, pages 143 - 151, XP004033272 * |
See also references of EP1598344A4 * |
ZHIZHENKO G.A. ET AL: "Thin-film organic recording materials for electric discharge visualization", VESTSI NATSYYANAL'NAI AKADEMII NAVUK BELARUSI, SERYYA FIZIKA-TEKHNICHNYKH NAVUK, vol. 1, 1998, pages 3 - 6, XP002979751 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006051848A1 (ja) * | 2004-11-12 | 2006-05-18 | Hirose Engineering Co., Ltd. | プラスチック成形体及び照射光波長の予測方法 |
WO2006101009A1 (ja) * | 2005-03-18 | 2006-09-28 | Hirose Engineering Co., Ltd. | ナイルレッド系赤色発光化合物、及び発光素子 |
WO2007046247A1 (ja) * | 2005-10-18 | 2007-04-26 | Hirose Engineering Co., Ltd. | ナイルレッド系赤色発光化合物、発光素子及びプラスチック成形体 |
Also Published As
Publication number | Publication date |
---|---|
EP1598344A4 (en) | 2007-07-11 |
JP2004262765A (ja) | 2004-09-24 |
CN1735602A (zh) | 2006-02-15 |
TW200427674A (en) | 2004-12-16 |
KR20050095627A (ko) | 2005-09-29 |
US20060252933A1 (en) | 2006-11-09 |
EP1598344A1 (en) | 2005-11-23 |
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