- Carbazoles compound and organic light-emitting device thereof
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The invention provides a carbazoles compound and an organic light-emitting device thereof, and relates to the technical field of organic photoelectric materials. The carbazoles compound has a specialfused ring structure by connecting substituted or unsubstituted carbazolyl group on a fulvene structure, and the strong photoelectric performance is endowed to the carbazoles compound by a large conjugate Pai electronic system. Since the carbazoles compound is provided with the special rigid plane fused ring structure, the whole movement of the group can be relatively limited, the glass transitiontemperature of the compound is effectively improved, film formation is facilitated. The preparation method of the carbazoles compound is simple, raw materials are easy to obtain, the carbazoles compound as a main body material is applied to an OLED device, the light-emitting efficiency of the device can be obviously improved, the driving voltage of the device can be effectively reduced, and the carbazoles compound is an OLED material with excellent performance.
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Paragraph 0136-0138
(2019/01/23)
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- Azacarbazole compound and organic light-emitting device thereof
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The invention provides an azacarbazole compound and an organic light-emitting device thereof, belonging to the technical field of organic photoelectric materials. According to the invention, 1,3,5-triazine main body structure is connected with a substituted or unsubstituted azacarbazolyl group; an electron transport material formed by such a combination manner has good electron transport capability, and when applied to an organic light-emitting device as an electron transport layer, the electron transport material can improve the recombination rate of holes and electrons at a luminescent layerand enhance the luminous efficiency of the device; and such a combination manner broadens a conjugated system, and a continuous Pi conjugated system brings in good electron flowability, so high electron mobility is obtained, carrier transport performance is improved, and carrier transport is made balanced. The azacarbazole compound is simple to prepare; raw materials of the azacarbazole compoundare easily available; when used as an electron transport layer in an OLED device, the azacarbazole compound can substantially improve the luminous efficiency of the device and effectively reduce the driving voltage of the device; and the azacarbazole compound is an OLED material with excellent performance.
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Paragraph 0110; 0112
(2019/01/08)
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- Exploiting Coupling of Boronic Acids with Triols for a pH-Dependent click-Declick Chemistry
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Click-like condensation of boronic acids with specifically designed triols (boronate-triol coupling) produces stable diamantane adducts in aqueous medium, which can be controllably cleaved to initial components under acidic conditions or by using boric acid as a chemical trigger. This novel click-declick strategy allows for the creation of temporary covalent connections between two or more modular units, which was demonstrated by the synthesis of new fluorophore-labeled natural molecules (peptides, steroids), supramolecular assemblies, modified polymers, boronic acid scavengers, solid-supported organocatalysts, biodegradable COF-like materials, and dynamic combinatorial libraries.
- Golovanov, Ivan S.,Mazeina, Galina S.,Nelyubina, Yulia V.,Novikov, Roman A.,Mazur, Anton S.,Britvin, Sergey N.,Tartakovsky, Vladimir A.,Ioffe, Sema L.,Sukhorukov, Alexey Yu.
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p. 9756 - 9773
(2018/09/06)
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- Bedford-type palladacycle-catalyzed miyaura borylation of aryl halides with tetrahydroxydiboron in water
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A mild aqueous protocol for palladium catalyzed Miyaura borylation of aryl iodides, aryl bromides and aryl chlorides with tetrahydroxydiboron (BBA) as a borylating agent is developed. The developed methodology requires low catalyst loading of Bedford-type palladacycle catalyst (0.05 mol %) and works best under mild reaction conditions at 40 °C in short time of 6 h in water. In addition, our studies show that for Miyaura borylation using BBA in aqueous condition, maintaining a neutral reaction pH is very important for reproducibility and higher yields of corresponding borylated products. Moreover, our protocol is applicable for a broad range of aryl halides, corresponding borylated products are obtained in excellent yields up to 93% with 29 examples demonstrating its broad utility and functional group tolerance.
- Zernickel, Anna,Du, Weiyuan,Ghorpade, Seema A.,Sawant, Dinesh N.,Makki, Arwa A.,Sekar, Nagaiyan,Eppinger, J?rg
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p. 1842 - 1851
(2018/02/23)
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- Off-axis digital holographic microscope as described in any one of Claims 1 to 6, includes a light coupled to the target unit (Sa) fluorescence excitation source (17).
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The invention belongs to the field of medicine synthesis and specifically relates to a preparation method of an anidulafungin side chain intermediate 4'-orthopentyloxy-1,1':4',1'-terphenyl-4-carboxylic acid. The preparation method comprises the following steps: initiating a 1,4-dibromo-benzene material which serves as a starting material to carry out Grignard reagent reaction with magnesium by iodine; then, preparing 1,4-benzene hypoboric acid by virtue of addition and hydrolysis with trimethyl borate; and preparing 4'-orthopentyloxy-1,1':4',1'- terphenyl-ethyl carboxylate by virtue of Suzuki reaction of 1,4-benzene hypoboric acid, 4-pentyloxy bromobenzene and 4-halogenated ethyl benzoate in dioxane-ethanol liquor under catalysis of [1,1'-bis(diphenyl phosphino) ferrocene] palladium dichloride, and then, hydrolyzing to obtain a target product. The preparation method disclosed by the invention can lower process cost, is simple, convenient, safe and reliable to operate, and suitable for industrial production.
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Paragraph 0042; 0043
(2017/01/02)
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- Organic and organometallic nanofibers formed by supramolecular assembly of diamond-shaped macrocyclic ligands and PdII complexes
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Stacked rings: A diamond-shaped macrocycle with two inward phenanthroline ligands and outward long alkyl chains, and its PdII complex form organic and organometallic fibrous aggregates, respectively, as revealed by NMR, UV/Vis, AFM, and TEM measurements. The most likely structures are face-to-face stacked macrocycles, generating nanotubes.
- Kuritani, Masumi,Tashiro, Shohei,Shionoya, Mitsuhiko
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supporting information
p. 1368 - 1371
(2013/07/26)
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- Side functionalization of diboronic acid precursors for covalent organic frameworks
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A series of substituted 1,4-benzenediboronic acids (BDBA) was synthesized and their thermal properties investigated. Two diboronic acids were studied as building-blocks for covalent organic framework (COF) formation, namely 2,5-dimethoxy-1,4-benzenediboronic acid and 2-nitro-1,4-benzeneboronic acid. Interestingly, substitution of the BDBA core caused a dramatic decrease of the polymerization temperature leading to the formation of a less organized structure.
- Faury, Thomas,Dumur, Frederic,Clair, Sylvain,Abel, Mathieu,Porte, Louis,Gigmes, Didier
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p. 2067 - 2075
(2013/04/23)
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- Optimizing sensitization processes in dinuclear luminescent lanthanide oligomers: Selection of rigid aromatic spacers
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This work illustrates a simple approach for optimizing the lanthanide luminescence in molecular dinuclear lanthanide complexes and identifies a particular multidentate europium complex as the best candidate for further incorporation into polymeric materials. The central phenyl ring in the bis-tridentate model ligands L3-L5, which are substituted with neutral (X = H, L3), electron-withdrawing (X = F, L4), or electron-donating (X = OCH 3, L5) groups, separates the 2,6-bis(benzimidazol-2-yl)pyridine binding units of linear oligomeric multi-tridentate ligand strands that are designed for the complexation of luminescent trivalent lanthanides, Ln(III). Reactions of L3-L5 with [Ln(hfac)3(diglyme)] (hfac- is the hexafluoroacetylacetonate anion) produce saturated single-stranded dumbbell-shaped complexes [Ln2(Lk)(hfac)6] (k = 3-5), in which the lanthanide ions of the two nine-coordinate neutral [N 3Ln(hfac)3] units are separated by 12-14 A. The thermodynamic affinities of [Ln(hfac)3] for the tridentate binding sites in L3-L5 are average (6.6 ≥ log(β2,1Y,Lk) ≥ 8.4) but still result in 15-30% dissociation at millimolar concentrations in acetonitrile. In addition to the empirical solubility trend found in organic solvents (L4 > L3 ? L5), which suggests that the 1,4-difluorophenyl spacer in L4 is preferable, we have developed a novel tool for deciphering the photophysical sensitization processes operating in [Eu2(Lk)(hfac) 6]. A simple interpretation of the complete set of rate constants characterizing the energy migration mechanisms provides straightforward objective criteria for the selection of [Eu2(L4)(hfac)6] as the most promising building block.
- Lemonnier, Jean-Francois,Guenee, Laure,Beuchat, Cesar,Wesolowski, Tomasz A.,Mukherjee, Prasun,Waldeck, David H.,Gogick, Kristy A.,Petoud, Stephane,Piguet, Claude
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p. 16219 - 16234
(2011/12/01)
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- Regiocontrolled synthesis of ethene-bridged para-phenylene oligomers based on PtII- And RuII-catalyzed aromatization
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We report the regiocontrolled syntheses of ethene-bridged paraphenylene oligomers in three distinct classes by using PtII- and Ru II-catalyzed aromatization. This synthetic approach has been developed based on twofold aromatization of the 1-aryl-2-alkynylbenzene functionality, which proceeds by distinct regioselectivity for platinum and ruthenium catalysts. Variable-temperature NMR spectra provide evi-dence that large arrays of these oligomers are prone to twist from planarity. The UV/Vis and photoluminescence (PL) spectra as well as the band gaps of these regularly growing arrays show a pattern of extensive π conjugation with increasing array sizes, except for in one instance.
- Chen, Tse-An,Lee, Te-Ju,Lin, Ming-Yuan,Sohel, Shariar M. A.,Diau, Eric Wei-Guang,Lush, Shie-Fu,Liu, Rai-Shung
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supporting information; experimental part
p. 1826 - 1833
(2010/06/19)
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- Synthesis of benzene- and pyridinediboronic acids via organotin compounds
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The synthesis of benzene- and pyridinediboronic acids via the organotin compounds was discussed. The organotin compound was dissolved in dry tetrahydrofuran (THF) and treated with a solution of borane in the same solvent under dry nitrogen. The physical characteristics of the compounds formed were found to be in agreement with those found in the literature.
- Mandolesi, Sandra D.,Vaillard, Santiago E.,Podestá, Julio C.,Rossi, Roberto A.
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p. 4886 - 4888
(2008/10/08)
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- Efficient synthesis of substituted terphenyls by Suzuki coupling reaction
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The Suzuki cross-coupling reactions of phenyl-1,4-diboronic acid bis-pinacol ester with a range of aryl halides are reported. The reaction proceeded smoothly, even with sterically hindered aryl halides, to give symmetrical terphenyls often quantitatively.
- Chaumeil, He?le?ne,Le Drian, Claude,Defoin, Albert
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p. 757 - 760
(2007/10/03)
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- New blue light emitting polymers having the characters of PPP and PPV
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The new blue light emitting conjugated polymers, PBPV and PTPV having advantages of both PPP and PPV, have been synthesized by Suzuki coupling reaction and nickel-catalyzed coupling reaction. The obtained polymers showed good solubility. PTPV has more goo
- Kim, Yun-Hi,Shin, Dong-Cheol,Ahn, Jun-Hwan,Kim, Hyung-Sun,Kwon, Soon-Ki
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p. 109 - 112
(2007/10/03)
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- A novel triarylamine-based conjugated polymer and its unusual lights- emitting properties
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A-new soluble triphenylamine-based conjugated polymer, poly[N-(4'- butylphenyl)imino(1,1':4',1''-terphenyl-4'4''-ylene)], (PBPITP), has been synthesized, which emits blue photoluminescence (PL) with high absolute PL quantum efficiency (45 ± 3%) but exhibits red electroluminescence (red shifted by as much as 157 nm from the PL spectrum).
- Yu, Wang-Lin,Pei, Jian,Huang, Wei,Heeger, Alan J.
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p. 681 - 682
(2007/10/03)
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