- Highly efficient dual anthracene core derivatives through optimizing side groups for blue emission
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TP-AA-TPB, TP-AA-TPB, TPB-AA-TPB, TP-AA-DPA, TP-AA-TPA, and TPB-AA-TPA were synthesized using a 9,9'-bianthracene (AA core). Through a systematic side group change, we optimized the dual-core chromophore system and investigated the relationship between the core and the side groups. The ultraviolet-visible (UV-Vis) absorption of the six materials showed an intrinsic absorption peaks of anthracene in the range of 360 nm–410 nm and photoluminescence (PL) emission in the blue region. The minimum decomposition temperatures (Td) was 425 °C, the minimum melting temperatures (Tm) was 335 °C, and the minimum glass transition temperatures (Tg) was 176 °C. We achieved excellent overall electroluminescence (EL) efficiency in non-doped OLED devices using the six synthesized materials as emitting layer (EML). TPB-AA-TPA synthesized through size and polarity optimization of the side groups on the AA core had a current efficiency of 8.97 cd/A, power efficiency of 4.43 lm/W, external quantum efficiency (EQE) of 6.37%, and Commission Internationale de L'Eclairage coordinates (CIE) of (0.14, 0.19). TPB-AA-TPA also maintained blue emission and realized the highest EL efficiency among the six synthesized materials.
- Lee, Hayoon,Jo, Minjin,Yang, Garam,Jung, Hyocheol,Kang, Seokwoo,Park, Jongwook
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- A practical and efficient synthesis of 5′-substituted m-terphenyls
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Outlined is a simple, convenient, scalable procedure for the synthesis of a variety of 5′-substituted m-terphenyl compounds from commercially available materials. A series of novel compounds were generated based on the m-terphenyl scaffold. In addition we
- Kehlbeck, Joanne D.,Dimise, Eric J.,Sparks, Sarah M.,Ferrara, Skylar,Tanski, Joseph M.,Anderson, Craig M.
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- Palladium Nanoparticles Supported on Poly(N-vinyl- imidazole-co-N-vinylcaprolactam) as an Effective Recyclable Catalyst for the Suzuki Reaction
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A recyclable and effective polymer-immobilized ligandless palladium catalyst for the Suzuki reaction has been investigated. Palladium nanoparticles are formed in situ and stabilized by poly(N-vinylimidazole-co-N-vinylcaprolactam). A series of aryl bromides have been studied in the reaction with phenylboronic acid under mild conditions with water-alcohol systems as a solvent that complies with "Green Chemistry" demands. The catalyst can be recycled eight times without appreciable loss in activity and a low degree of palladium leaching. Kinetic studies reveal unusual behavior of the reaction; this can be explained on the basis of the observation of changes to the sizes of the particles during recycling, as determined by TEM results. The suggested mechanism of the reaction is in accordance with the concept of the role of leaching in the process. Fast or slow? Palladium nanoparticles immobilized on poly(N-vinylimidazole-co-N-vinylcaprolactam) reveal unusual kinetic behavior in the Suzuki reaction. This can be explained on the basis of the observation of changes to the sizes of the particles during recycling, and is in accordance with the concept of leaching during the process.
- Selivanova, Alexandra V.,Tyurin, Vladimir S.,Beletskaya, Irina P.
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- Synthesis of a new, bulky tetraarylphosphonium, a tetraarylborate, and their salt
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Tris(m-terphenyl-5′-yl)phosphine (2), tetrakis(m-terphenyl-5′- yl)phosphonium bromide (3), sodium tetrakis(m-terphenyl-5′-yl)borate (4), and the phosphonium borate salt 5 of 3 and 4 were synthesized, in the expectation of creating interionic spacings that
- Matsumoto, Kaya,Hatano, Keiichiro,Umezawa, Naoki,Higuchi, Tsunehiko
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- Synthesis and physical properties of new pyrene derivative with bulky side groups for blue emission
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Organic light-emitting diodes (OLEDs) have attracted much attention from academia and industry field because of their various applications such as large area flat-panel displays and lightings. We designed and synthesized new pyrene derivative with 1,6-bis(3',5'-diphenylbiphenyl-4-yl)pyrene (1,6-DTBP) which has bulky side group for intra-twisted structure and blue emission. In solution state, 1,6-DTBP exhibited absorption maximum value of 365 nm and photoluminescence (PL) maximum value of 425 nm. In film state, 1,6-DTBP exhibited absorption maximum value of 373 nm and PL maximum value of 461 nm without excimer band. 1,6-DTBP can be applicable to OLED emitter as a blue emission.
- Jung, Mina,Lee, Jaehyun,Jung, Hyocheol,Park, Jongwook
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- Catalytic formal cycloadditions between anhydrides and ketones: Excellent enantio and diastereocontrol, controllable decarboxylation and the formation of adjacent quaternary stereocentres
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It has been shown for the first time that enolisable anhydrides can participate in highly efficient and diastereo/enantioselective additions to activated ketones. In these reactions the anhydride component formally acts (initially) as the nucleophilic component. These processes are promoted by novel, readily prepared urea-substituted cinchona alkaloid-derived catalysts at low loadings under mild conditions. Three classes of enolisable anhydride and three different types of activated ketone were shown to be compatible with the process-generating a diverse range of structurally distinct and densely functionalised lactone products with the formation of two new stereocentres, one of which is quaternary. In one example, a product incorporating two contiguous quaternary stereocentres (one all carbon) was formed with outstanding enantiocontrol. It has been shown in the case of glutaconic anhydride derivatives that the cycloaddtion process is reversible, and can be accompanied by decarboxylation and olefin isomerisation. Reaction conditions can be modified to give access to three types of product with good-excellent ee.
- Cornaggia, Claudio,Gundala, Sivaji,Manoni, Francesco,Gopalasetty, Nagaraju,Connon, Stephen J.
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- Three-Dimensional Structures Based on the Fusion of Chrysene and Spirobifluorene Chromophores for the Development of Blue OLEDs
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A new deep-blue chromophore containing a three-dimensionally (3D) shaped CS core composed of fused chrysene and spirofluorene units is synthesized. A pair of m-terphenyl (TP) units is also substituted onto the CS core at two different sets of positions to
- Lee, Hayoon,Jung, Hyocheol,Kang, Seokwoo,Heo, Jin Hyuck,Im, Sang Hyuk,Park, Jongwook
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- Highly efficient pyrene blue emitters for OLEDs based on substitution position effect
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To investigate the effect of substitution position of the side group on a pyrene core, three derivatives having a triphenylbenzene group as a bulky side group at the 1,6-position, 4,9-position, and 1,8-position were successfully synthesized: 1,6-bis(5′-phenyl-[1,1':3′,1″-terphenyl]-4-yl)pyrene (1,6-DTBP), 4,9-bis(5′-phenyl-[1,1':3′,1″-terphenyl]-4-yl)pyrene (4,9-DTBP), and 1,8-bis(5′-phenyl-[1,1':3′,1″-terphenyl]-4-yl)pyrene (1,8-DTBP). The three synthesized materials showed excellent thermal stability with a high Tg of >140 °C and a high Td of >500 °C. Due to the highly twisted structure of 1,8-DTBP in the film state, the absolute photoluminescence quantum yield value was improved. Of the three synthesized materials used as an emitter in a non-doped organic light-emitting diode device, 1,8-DTBP showed highly efficient electroluminescence performance, with a luminance efficiency of 6.89 cd/A, power efficiency of 3.03 lm/W, and external quantum efficiency of 7.10% at 10 mA/cm2. In addition, 4,9-DTBP showed a deep-blue emission of CIE x, y (0.158, 0.063) suitable for HD-TV.
- Jung, Mina,Lee, Jaehyun,Jung, Hyocheol,Kang, Seokwoo,Wakamiya, Atsushi,Park, Jongwook
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Read Online
- In-Line Monitoring and Spectral Analysis of Polymer Blend Dispersion in Microcompounder
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Microcompounders are the most common compounding machines for making polymer composites. The torque rheometry is an effective tool for predicting the processing characteristics of thermoplastic polymers. It provides continuous monitoring of torque and tem
- Oh, Won Taek,Kim, Myung Ho,Do, Quyen,Cho, Namchul,Kim, Tae-Dong
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- METHOD OF PRODUCING HALOGEN COMPOUND
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PROBLEM TO BE SOLVED: To provide a method of efficiently producing an aromatic compound including a halogen group of interest. SOLUTION: A method of producing a halogen compound represented by the specified general formula (1) comprises reacting a compound represented by the specified general formula (2) with a compound represented by the specified general formula (3) in the presence of a transition metal compound, a phosphine compound being 1,1'-bis(diphenylphosphino)ferrocene or 4,5'-bis(diphenylphosphino)-9,9'-dimethylxanthene, and a base. (In the formula, Ar1 and Ar2 represent organic groups; X represents a halogen group; Z represents a halogen group different than X; m represents an integer greater than or equal to 0; p represents an integer greater than or equal to 1; and each R represents a hydrogen atom, alkyl group or phenyl group, where the two R's may be linked together to form a ring.) SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
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Paragraph 0052-0060; 0079-0081
(2021/05/07)
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- Palladium-catalysed room-temperature Suzuki–Miyaura coupling in water extract of pomegranate ash, a bio-derived sustainable and renewable medium
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An agro waste-derived, ‘water extract of pomegranate ash’ (WEPA), has been utilized for the first time as a renewable medium for Pd(OAc)2-catalysed Suzuki–Miyaura cross-coupling at room temperature. This method offers a simple and sustainable synthesis of biaryls from aryl halides and arylboronic acids under ligand- and external base-free aerobic and ambient conditions. This method has been found effective for both activated and unactivated aryl halides in the production of biaryls with moderate to nearly quantitative yields. The protocol shows high chemoselectivity over identical/similar reactive sites in aryl halides (i.e. selectivity over identical halogens or different halogens of aryl halides). This method exhibits high regioselectivity, i.e. the selective reactivity of a halogen over other identical halogens at different positions on the aromatic nucleus. Therefore, we disclose here a clean, benign, substantial chemo- and regioselective and highly economic alternative method for the palladium-assisted synthesis of biaryls using an agro waste-derived medium.
- Appa, Rama Moorhy,Prasad, S. Siva,Lakshmidevi, Jangam,Naidu, Bandameeda Ramesh,Narasimhulu, Manchala,Venkateswarlu, Katta
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- Preparation method of 3,5-diphenylbromobenzene
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The invention belongs to the field of organic synthesis and provides a novel method of synthesizing 3,5-diphenylbromobenzene. 2,4,6-Tribromoaniline is used as a start material subjected to diazotization iodination and Grignard reaction to obtain 3,5-diphenylbromobenzene. Compared with traditional synthetic processes, the novel process has simple synthetic steps; the materials selected are easy toattain and low in price; the two reaction steps are easy to implement; the product yield is high; 3,5-diphenylbromobenzene is easy to industrially produce.
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Paragraph 0019; 0021; 0022; 0024; 0025; 0027
(2019/07/01)
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- COMPOUNDS FOR ORGANIC OPTOELECTRONIC DEVICE AND ORGANIC OPTOELECTRONIC DEVICE INCLUDING THE SAME
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A compound for an organic optoelectronic device represented by Chemical Formula 1 and an organic optoelectronic device including the same are provided. In Chemical Formula 1, R1 to R5 are independently hydrogen, deuterium, —NH2, a substituted or unsubstit
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Paragraph 0071
(2018/02/22)
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- COMPOUND, MATERIAL FOR ORGANIC ELECTROLUMINESCENT ELEMENTS, ORGANIC ELECTROLUMINESCENT ELEMENT AND ELECTRONIC DEVICE
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A compound represented by formula (1) provides a high performance organic electroluminescence device and a novel material for realizing such an organic electroluminescence device: wherein R1 to R6, a to f, L1 to L3, and Ar are as defined in the description.
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Paragraph 0187; 0193; 0194
(2018/08/25)
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- Synthesis and electroluminescence properties of new dual-core derivatives
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New blue emitting materials based on dual core concept, TP-AF-TP and TP-HAF-TP were synthesized through boronylation and Suzuki coupling reactions. In the thin film state, TP-AF-TP and TP-HAF-TP exhibited maximum PL values at 445 and 440 nm, respectively. A non-doped OLED device based on TP-AF-TP and TP-HAF-TP showed current efficiency of 3.16 and 2.67 cd/A, respectively. TP-AF-TP exhibited a higher EL efficiency than that of TP-HAF-TP.
- Lee, Hayoon,Lee, Sunmi,Jung, Hyocheol,Kang, Seokwoo,Park, Jongwook
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p. 2166 - 2170
(2018/01/12)
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- ORGANIC COMPOUND INCLUDING FUSED CORE MOIETY, ORGANIC OPTOELECTRIC DEVICE INCLUDING THE SAME AND DISPLAY
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The present invention relates to: an organic compound represented by a combination of chemical formula 1 and chemical formula 2; and an organic optoelectronic device and a display device comprising the organic compound. In chemical formulas, R1 to R5, R9 to R14, X, m and n are the same as described in the specification. Good electrical properties, light emitting properties, color properties, and the like can be obtained by employing the organic compound to the organic optoelectronic device.COPYRIGHT KIPO 2016
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- Highly efficient emitters of ultra-deep-blue light made from chrysene chromophores
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Chrysene, which has a wide band gap, was selected as an emission core to develop and study new materials that emit ultra-deep-blue light with high efficiency. Six compounds introducing various side groups were designed and synthesized: 6,12-bis(3′,5′-diph
- Shin, Hwangyu,Jung, Hyocheol,Kim, Beomjin,Lee, Jaehyun,Moon, Jiwon,Kim, Joonghan,Park, Jongwook
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supporting information
p. 3833 - 3842
(2016/05/24)
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- COMPOUND FOR ORGANIC ELECTRONIC ELEMENT, ORGANIC ELECTRONIC ELEMENT USING THE SAME, AND AN ELECTRONIC DEVICE THEREOF
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The present invention provides a novel compound capable of improving light-emitting efficiency of an element, stability, and lifespan, an organic electronic element using the same, and an electronic device thereof, wherein the compound is represented by chemical formula 1.(110) Substrate(120) Positive electrode(130) Hole injection layer(140) Hole transport layer(141) Buffer layer(150) Light emitting layer(151) Light emitting assisting layer(160) Electron transport layer(170) Electron injection layer(180) Negative electrodeCOPYRIGHT KIPO 2016
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Paragraph 0162; 0173; 0175; 0176; 0177
(2016/10/07)
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- An electroluminescent compound and an electroluminescent device comprising the same
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The present invention relates to an organic light-emitting compound represented by chemical formula 1, and an organic electroluminescent device comprising the same. According to the present invention, the organic electroluminescent device employing an organic light-emitting compound as a host material in light-emitting layer of a device or a hole transport material of a hole injection layer and a hole transport layer, has more improved light-emitting efficiency and a long lifespan property than a host compound or a hole transport material which is conventionally employed and enables low-voltage drive.COPYRIGHT KIPO 2016
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Paragraph 0467-0472
(2016/10/10)
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- Novel organic electroluminescent compounds and organic electroluminescent device using the same
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The present invention relates to novel organic electroluminescent compounds which are used for a hole injecting material or a hole transporting material and are represented by chemical formula 1. When the organic electroluminescent compounds according to the present invention are used for the hole injecting material or the hole transporting material of an organic electroluminescent device, the organic electroluminescent device with improved driving characteristics can be produced since the light-emitting efficiency and lifetime of the device is improved.
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Paragraph 0377-0382
(2020/04/22)
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- Effect of the length of side group substitution on optical and electroluminescene properties
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Blue emitting materials, 9,10-bis-biphenyl-4-yl-anthracene (AC-P), 9,10-bis-[1,1';4',1'']terphenyl-4-yl-anthracene (AC-DP), and 9,10-bis[3'',5''-deiphenyltriphenyl-4'-yl]anthracene (AC-TP) were synthesized through boration and Suzuki aryl-aryl coupling re
- Shin, Hwangyu,Kang, Hyeonmi,Kim, Beomjin,Park, Youngil,Yu, Young-Jun,Park, Jongwook
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p. 3041 - 3046
(2014/12/11)
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- Bianthracene compounds substituted by aromatic ring and their uses for luminescence materials
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The present invention relates to Aromatic ring substituted dianthracene compounds and pertains to the field of synthesis of organic light-emitting materials. Aromatic ring substituted dianthracene compounds in the formula (I) present high glass transition temperature and solution efficiency, which can be used as effective blue-light emitting host materials.
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Page/Page column 12
(2012/12/14)
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- N-PHENYL TRISCARBAZOLE
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The present invention relates to a novel triscarbazole compound having substituent on N-phenyl, which can be represented by Formula (I). wherein R1 is selected from the group consisting of hydrogen, halogen or alkyl or alkoxy group having 1 to 20 carbon atoms wherein at least one hydrogen atom is optionally replaced by halogen; RA, RB, RC, RD and RE are any of substituents other than hydrogen wherein at least two of R1 and RA may further form a fused ring; and i, j, k, l and m are same or different at each occurrence and represent an integer from 0 to 4, with the proviso that when R1 is hydrogen, i is not 0. By introduction of the substituent on N-phenyl, the device efficiency, stability and lifetime can be increased while maintaining the solubility. These compounds can be used in various organic devices such as organic light emitting diodes, photovoltaic cells or organic semiconductor devices.
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Page/Page column 21
(2012/03/26)
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- Organic light-emitting device
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A heterocyclic compound represented by a general Formula 1 and an organic light-emitting device including the heterocyclic compound. In some embodiments the heterocyclic compound of Formula 1 may be used as a light-emitting material, a hole transporting material, or an electron transporting material. The heterocyclic compound of Formula 1 having a heterocyclic group in the molecules thereof has a high glass transition temperature (Tg) or a high melting point due to the inclusion of the heterocyclic group. Thus, the heterocyclic compound has high heat resistance against Joule's heat generated in an organic layer, between organic layers, or between an organic layer and a metal electrode when light emission occurs, and has high durability in high-temperature environments. An organic light-emitting device manufactured using the heterocyclic compound of Formula 1 has high durability when stored or operated. In addition, due to the inclusion of a substituent such as an aryl group or heteroaryl group, molecular layers formed as thin films may be maintained in good condition, thereby improving the characteristics of the organic light-emitting device.
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Page/Page column 37
(2012/05/20)
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- AROMATIC AMINE DERIVATIVE, AND ORGANIC ELECTROLUMINESCENT ELEMENT COMPRISING SAME
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Provided is an aromatic amine derivative represented by the formula N(ArA) (ArB) (ArC) as an organic EL device material capable of reducing the driving voltage of an organic EL device, and improving its luminous efficiency and device lifetime. ArA represents the formula (II-1) or (II-2). La represents an arylene group or the like, Ara represents an aryl group or the like, and n represents 2 or 3. ArB represents the formula (III). Lb represents a single bond or the like, R1 and R2 each represent an alkyl group or the like, o and p each represent 0 to 3 or the like, X represents an oxygen atom or the like, and R3, R4 and R5 each represent an alkyl group or the like. Arc represents an aryl group, a heteroaryl group, or the formula (II-1), (II-2), or (III).
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Page/Page column 40
(2012/10/18)
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- Synthesis and solid-state rotational dynamics of molecular gyroscopes with a robust and low density structure built with a phenylene rotator and a tri(meta -terphenyl)methyl stator
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Recent studies suggest that the rotational dynamics in crystals of molecular gyroscopes become more favorable (i.e., faster) when the packing coefficient of the corresponding lattice is decreased by increasing the steric bulk of the stator, as expected fo
- O'Brien, Zachary J.,Natarajan, Arunkumar,Khan, Saeed,Garcia-Garibay, Miguel A.
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experimental part
p. 2654 - 2659
(2012/04/23)
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- Novel star-shaped host materials for highly efficient solution-processed phosphorescent organic light-emitting diodes
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Two novel star-shaped host materials for solution processed blue phosphorescent organic light-emitting devices, 9-(5′,5?-diphenyl[1, 1′:3′,1″:3″,1?:3?,1-quinquephenyl] -5″-diyl)-9H-carbazole (DQC) and 9,9′-(5′-phenyl[1,1′: 3′,1″-terphenyl]-3,5-diyl)bis-9H-carbazole (PTC), were synthesized by the Suzuki coupling reaction. These compounds both exhibited high glass-transition temperatures (Tg ≥ 128 °C) and excellent film-forming ability. The nonplanar star-shaped configuration of DQC and PTC limited the effective extension of their π-conjugation, leading to the same triplet energy of 2.81 eV. The solution processed single layer devices using DQC and PTC as the host for the phosphorescence emitter iridium(iii) bis(4,6-difluorophenylpyridinato)-picolinate (FIrpic) showed the maximum luminance efficiencies of 9.2 and 12.8 cd A-1, respectively. By introducing a thin 1,3,5-tris(1-phenyl-1H-benzo[d]imidazol-2-yl)benzene (TPBI) electron-transporting and exciton-confining layer, the maximum efficiencies of the solution processed devices based on DQC and PTC were further improved to 21.7 and 25.7 cd A-1 with the maximum external quantum efficiencies up to 9.2% and 11.9%, respectively. Furthermore, the DQC- and PTC-based devices showed significantly high performance compared with the corresponding devices based on 1,3-bis(9-carbazolyl)benzene (mCP).
- Jiang, Wei,Duan, Lian,Qiao, Juan,Zhang, Deqiang,Dong, Guifang,Wang, Liduo,Qiu, Yong
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experimental part
p. 6131 - 6137
(2011/08/06)
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- THIAZOLE SYSTEM ORGANIC ELECTROLUMINESCENT COMPOUNDS AND ORGANIC LIGHT EMITTING DIODE USING THE SAME
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The present invention relates to novel thiazole system organic electroluminescent compounds and organic light emitting diodes comprising the same. Since the thiazole system organic electroluminescent compounds according to the invention have good luminous efficiency and life property, OLED's having very good operation lifetime can be produced.
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Page/Page column 24
(2010/08/07)
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- SINGLE TRIPHENYLENE CHROMOPHORES IN PHOSPHORESCENT LIGHT EMITTING DIODES
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Novel triphenylene compounds are provided. Specific examples include multi-aryl-substituted triphenylenes. A preferred group of compounds are triphenylenes that are substituted with a non-fused aryl group having one or more meta-substituents, where each meta-substituent is a non-fused aryl group optionally substituted with further substituents selected from the group consisting of non-fused aryl groups and alkyl groups. A further preferred group of compounds are triphenylenes that are substituted with a non-fused heteroaryl group having one or more meta-substituents, where each meta-substituent is a non-fused aryl or heteroaryl group optionally substituted with further substituents selected from the group consisting of non-fused aryl groups, non-fused heteroaryl groups, and alkyl groups. Some high triplet energy analogs are expected to work with deep blue phosphorescent dopants. The compounds may be useful in phosphorescent organic light emitting devices. Also provided is an organic electroluminescent device comprising an anode, a cathode, and an emissive layer between the anode and the cathode, the emissive layer comprising a phosphorescent material and a compound having a repeat unit, the repeat unit containing a triphenylene moiety.
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Page/Page column 32
(2009/04/25)
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- Exceedingly efficient deep-blue electroluminescence from new anthracenes obtained using rational molecular design
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9,10-Bis(3′,5′-diphenylphenyl)anthracene [MAM], 9-(3′,5′-diphenylphenyl)-10-(3?,5?-diphenylbiphenyl- 4″-yl)anthracene [MAT], and 9,10-bis(3″,5″-diphenylbiphenyl- 4′-yl)anthracene [TAT] were newly synthesized through boration and Suzuki aryl-aryl coupling
- Kim, Soo-Kang,Yang, Bing,Ma, Yuguang,Lee, Ji-Hoon,Park, Jong-Wook
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experimental part
p. 3376 - 3384
(2010/02/28)
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- Double-spiro organic compounds and organic electroluminescent devices using the same
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Disclosed are double-spiro organic compounds and an organic electroluminescence (EL) device using the same. The double-spiro organic compounds are configured to have at least three planar and substantially linear moieties, such that one planar moiety is located between two neighboring planar moieties and that the intervening planar moiety shares an atom with each of the two neighboring planar moieties. The double-spiro compounds generally have high melting point above about 300 degree C. and low crystallinity, which provide thermal stability to the organic EL devices. These organic compounds have good sublimability. They also have light-emitting, hole-injecting, hole-transporting, electron injection, electron-transporting properties and characteristics, which are favorable in the organic EL devices.
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Page/Page column 52
(2010/02/15)
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- Organic electroluminescent elements for stable blue electroluminescent devices
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An organic EL device including an anode, a cathode, and an organic electroluminescent element between the anode and the cathode; the organic electroluminescent element includes an organic material or a mixture thereof of 9,10-bis(3'5'-diaryl)phenyl anthracene derivatives.
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- meso-Substituted Porphyrins, 5. Basket Porphyrins
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2-Pyrryl-(m-terphenyl)-carbinol and 2-pyrryl-(3,3'',5,5''-tetra-t-butyl-m-terphenyl)-carbinol are cyclized in acidic medium to the corresponding meso-tetraarylporphyrins.The meso-tetraarylporphyrins are transferred to the iron and manganese complexes.The
- Volz, Heinrich,Hassler, Michael
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p. 1043 - 1052
(2007/10/02)
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- A One-Pot Synthesis of m-Terphenyls via a Two-Aryne Sequence
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Aryl-Grignards (3+ equiv) react with 2,6-dibromoiodobenzene or other 1,2,3-trihalobenzenes to give 2,6-diarylphenylmagnesium halides.The mechanism involves Grignard exchange at the central halogen, followed by two cycles of magnesium halide loss and regioselective capture of the resulting aryne by the aryl-Grignard reagent (Scheme I).Typical examples are shown in Table I.The method is especially applicable to m-terphenyls in which the "outer" rings are identical and/or in which substitution at the 2' or other positions of the "central" ring is desired.
- Du, Chi-Jen Frank,Hart, Harold,Ng, Kwok-Keung Daniel
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p. 3162 - 3165
(2007/10/02)
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