- A perylene pigment preparation method
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The present invention provides a perylene pigment preparation method, is to adopt the N - substituted - 1, 8 - naphthalene imide as the starting material, in order to N - methyl imidazole with DBU or DBN N - methyl imidazole with the mixed solvent as reaction medium, sodium alcoholate or polysiloxane as catalyst, through 130 - 170 °C reaction 3 - 10 hours, after the reaction, the reaction system cooling, concentrated under reduced pressure, recycling the reaction solvent, collects the product make the perylene pigment. Preparation of perylene pigment coloring high, bright color, good dispersibility, and this process is simple, time consuming and short, the reaction temperature is low, to reduce the use of strong alkali and concentrated sulfuric acid, the production cost is reduced, the reduction of the waste water and the solid waste discharge.
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Paragraph 0026-0028
(2019/04/11)
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- Method for preparing C.I. pigment red 179
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The invention relates to a method for preparing N,N'-dimethyl-3,4,9,10-perylenetetracarboxylic diimide (C.I. pigment red 179). A reaction is conducted on N-methyl-1,8-naphthalimide in a system composed of a mixed base composed of caesium hydroxide or hydrate thereof and DBU and polar aryl halide at 140 DEG C-190 DEG C, and N,N'-dimethyl-3,4,9,10-perylenetetracarboxylic diimide can be obtained. After pigment-based processing is conducted on N,N'-dimethyl-3,4,9,10-perylenetetracarboxylic diimide, the crystal form of N,N'-dimethyl-3,4,9,10-perylenetetracarboxylic diimide is the same as that of a C.I. pigment red 179 product.
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Paragraph 0035; 0036
(2016/12/01)
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- Organic photoelectric device and image sensor including the same
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An organic photoelectric device may include an anode and a cathode facing each other and the active layer between the anode and cathode, wherein the active layer includes a compound represented by Chemical Formula 1 and a compound represented by Chemical Formula 2. Chemical Formula 1 and Chemical Formula 2 are the same as in the detailed description.
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Page/Page column 21
(2016/09/15)
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- A "green" route to perylene dyes: Direct coupling reactions of 1,8-naphthalimide and related compounds under mild conditions using a "new" base complex reagent, t-BuOK/DBN
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The direct coupling reactions of 1,8-naphthalimide compounds efficiently occurred at 130 or 170 °C without the intervention of the leuco form dyes in the presence of base complex reagent, t-BuOK/1,5-diazabicyclo[4.3.0]non-5-ene (DBN), to give the corresponding perylene dyes in good yields with >95% purities. A possible mechanistic speculation for these oxidative coupling reactions is briefly discussed.
- Sakamoto,Pac
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- Perylene derivatives formation in reaction of 3-bromobenzanthrone and 4-bromonaphthalic acid derivatives with a reduction system NiCl2 - 2,2′bipyridyl (or 1,10-phenathroline) - Zn
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The reaction of 3-bromobenzanthrone and 4-bromonaphthalic acid derivatives with a reduction system NiCl2-2,2′bipyridyl (or 1,10-phenathroline)-Zn gives rise to compounds containing perylene fragment. Under similar conditions was established a possibility to transform substituted 1,1′-binaphthyls into the corresponding perylene derivatives.
- Adonin,Ryabinin,Starichenko
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p. 861 - 865
(2007/10/03)
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- Self-assembly of cationic, tetranuclear, Pt(II) and Pd(II) macrocyclic squares. X-ray crystal structure of [Pt2+(dppp)(4,4′-bipyridyl)2-OSO 2CF3]4
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The preparation, characterization, and some chemistry of a series of unique cationic, tetranuclear, Pt(II)-and Pd(II)-based macrocyclic squares are reported. A variety of bidentate ligands (bipyridine, diazapyrene, dicyanobenzene, and dicyanobiphenyl) are interacted with the square-planar cis-bis(phosphine) Pt and Pd bis(triflate) complexes in organic solvents at room temperature, resulting in molecular squares in high isolated yields via self-assembly. All molecular squares are robust air- and water-stable microcrystalline solids with decomposition points mostly above 200 °C. They are generally soluble in polar organic solvents but not in water or nonpolar solvents like pentane, toluene, and ether. The cyano-based macrocycles are highly fluxional in solution, whereas the bipy and related systems are more stable. Concentration-dependent chemical shifts are observed for the ortho and meta protons of 1,5-dihydroxynaphthalene, indicating host-guest interactions and inclusion phenomena. X-ray crystal structures are reported for the molecular square [(dppp)Pt(bipy)]48+8-OSO2CF 3 (15a), as well as a dinuclear dicyanobenzene complex 25 and the [(dppp)M(pyrazine)]2+2-OSO2CF3 (M = Pt, Pd) complexes 20a,b.
- Stang, Peter J.,Cao, Danh H.,Saito, Shinichi,Arif, Atta M.
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p. 6273 - 6280
(2007/10/02)
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- Photoconductivity studies of perylene tetracarbonyl-diimides
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Photoconductivity of a series of perylene tetracarboxyl-diimides has been studied by delayed-collection-field and electric field induced fluorescence quenching techniques.It has been shown that these materials exhibit both extrinsic (impurity controlled) and intrinsic carrier generation originating from the first excited singlet state.Perylene tetracarboxyl-diimides are photoactive in the visible spectral range and their carrier generation efficiencies compare well with generation efficiencies in the best known organic photoconductors.This makes them suitable for xerographic application using visible light.
- Popovic, Zoran D.,Loutfy, Rafik O.,Hor, Ah-Mee
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p. 134 - 139
(2007/10/02)
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- Process for upgrading the color value of 3,4,9,10-tetracarboxylic acid N,N'-bis-methylimide
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A process for the manufacture of a red pigment from perylene-3,4,9,10-tetracarboxylic acid N,N'-bis-methylimide which has been obtained by methylating the corresponding diimide or by fusing naphthalic acid N-methylimide with an alkali metal hydroxide which comprises vatting a suspension of N,N'-bis-methylimide dye with 0.5-1.5 times by weight of an alkali metal dithionite in the presence of up to 4 times by weight of an alkali metal hydroxide relative to the quantity of the dithionite, at a temperature of from room temperature to 100° C., to obtain the corresponding leuco compound, cooling the resulting solution to 20°-40° C., isolating and washing the leuco compound with fresh vatting solution until the solution is virtually colorless and clean and then oxidizing the leuco compound.
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