- Aromatic compound and organoelectro luminescent device comprising the compound
-
The present invention relates to an aromatic compound denoted by chemical formula 1, and an organic electroluminescent device comprising the compound. The organic electroluminescent device comprising the aromatic compound by the present invention has low driving voltage, and excellent lifetime properties and luminance efficiency.
- -
-
Paragraph 0368; 0374-0378
(2020/12/08)
-
- Naphtho-fluorene carbazole compound and application thereof
-
The invention belongs to the field of organic electroluminescence, and in particular relates to a naphtho-fluorene carbazole compound and application thereof. An OLED device manufactured by taking thesynthesized organic compound as a main body light-emitting material can be applied in the fields of AM drive OLED display, PM drive OLED display or OLED illumination. The external quantum efficiency,the power efficiency and the current efficiency of the device are greatly improved, and the service life of the device is obviously prolonged, so that the naphtho-fluorene carbazole compound has thegood market prospect.
- -
-
Paragraph 0097; 0100-0102
(2018/03/26)
-
- Novel aromatic amine compounds for organic light-emitting diode and organic light-emitting diode including the same
-
The present invention relates to an organic light emitting compound represented by the chemical formula A or the chemical formula B and an organic light emitting diode comprising the same, wherein A1 to A3, X, Y, and Z are the same as defined in the specification.COPYRIGHT KIPO 2016
- -
-
Paragraph 0730-0735
(2016/10/10)
-
- Fluorene-based boronic acids as fluorescent chemosensor for monosaccharides at physiological pH
-
Two fluorene-based boronic acids, 9,9-dimethyl-9H-fluoren-2-yl-2-boronic acid (1) and 9,9-dimethyl-9H-fluoren-2,7-diyl-2,7-diboronic acid (2), were synthesized and their sensing abilities for detection of D-monosaccharides were investigated by fluorescence at physiological pH. It was found that both boronic acids 1 and 2 have high selectivity and sensitivity for D-fructose with stability constant of 47.2 and 412.9, respectively. The sensor 2 showed a linear response toward D-fructose in the concentration range from 5 × 10-5 to 10-1 mol L-1 with the detection limit of 2 × 10-5 mol L-1.
- Hosseinzadeh, Rahman,Mohadjerani, Maryam,Pooryousef, Mona
-
p. 549 - 555
(2015/12/04)
-
- Synthesis and photoluminescent properties of new aza-indenofluorene derivatives
-
The carbazole derivatives 5a-h were synthesized by four steps involving Suzuki coupling of boronic acid 1 with 1-bromo-2-nitrobenzene, followed with the Cadogan ring closure reaction. Their UV and photoluminescence properties are also reported, and the co
- Jung, Su Jin,Kim, Won Sam,Park, Byung Sun,Lee, Jae Kyun,Park, Jung Hwan,Choi, Kihang,Lee, So Ha
-
-
- Synthesis and characterization of highly stable and efficient star-molecules
-
A series of well-defined star-shaped molecules have been synthesized by Pd-catalyzed Suzuki cross-coupling starting from very simple reactants with 1,3,5-trisubstituted benzene, 2,4,6-trisubstituted pyridine and trisubstituted phenylcarbazole as the backbones. These star-molecules are all soluble in common organic solvents and electrochemically stable with reversible cyclic voltammographs and high lying HOMOs. They exhibit excellent blue-fluorescence with quantum yield up to 0.87 and high glass transition temperatures. These molecules offer potential as pure blue-light emitting, hole-transport or host materials for optoelectronic applications.
- Huang, Hai-Fang,Xu, Shi-Hua,He, Yan-Bo,Zhu, Cai-Cai,Fan, He-Liang,Zhou, Xue-Hua,Gao, Xi-Cun,Dai, Yan-Feng
-
p. 705 - 713
(2013/03/13)
-
- NOVEL COMPOUNDS FOR ORGANIC ELECTRONIC MATERIAL AND ORGANIC ELECTROLUMINESCENT DEVICE USING THE SAME
-
Provided are novel compounds in accordance with Formula I for an organic electronic material and an organic electroluminescent device using same. The compound for an organic electronic material disclosed herein exhibits high electron transport efficiency and thus prevents crystallization upon manufacturing a device, and also facilitates the formation of a layer, thus improving current properties of the device. Thereby, OLED devices having improved power efficiency as well as reduced operating voltage can be manufactured. Formula (I)
- -
-
Page/Page column 12
(2012/05/04)
-
- Synthesis and biological activity of new 4-(Pyridin-4-yl)-(3-methoxy-5- methylphenyl)- 1H-pyrazoles derivatives as ROS Receptor tyrosine kinase inhibitors
-
A series of new 4-(pyridin-4-yl)-(3-methoxy-5-methylphenyl)-1H-pyrazoles (6a-k & 7a-l) has been rationally designed based on the structure of the lead compound KIST301080, a selective ROS receptor tyrosine kinase inhibitor, in order to study the activity of ROS of this new class of inhibitors. The compounds were synthesized and screened against ROS kinase, where compound 6h showed moderate inhibitory activity with an IC50 value of 6.25 μM. The study emphasized the importance of the acetonitrile group at the pyrazole ring and also the importance of having a hydrogen bond donor on the distal phenyl ring linked to the pyridine moiety.
- Park, Byung Sun,El-deeb, Ibrahim M.,Yoo, Kyung Ho,Han, Dong Keun,Tae, Jin Sung,Lee, So Ha
-
p. 3629 - 3634
(2013/01/16)
-
- AROMATIC AMINE DERIVATIVES AND ORGANIC ELECTROLUMINESCENT ELEMENTS USING SAME
-
Provided are an organic EL device material capable of reducing the driving voltage of an organic EL device and increasing the lifetime of the device as compared with a conventional organic EL device material, specifically an aromatic amine derivative represented by N(Ara)(Arb)(Arc), and an organic EL device using the material. [Ara is represented by the formula (II). (In the formula (II): La represents a single bond or an arylene group; R1 to R4 each represent an alkyl group, an aryl group, or the like, and R3's or R4's, or R3 and R4 may be bonded to each other to form a ring; and o represents 0 to 3 and p represents 0 to 4.) Arb is represented by the formula (III). (in the formula (III), X represents NRa, O, or S, and Ra and R5 to R7 each represent an alkyl group, an aryl group, or the like, and R5's, R6's, or R7's adjacent to each other, or R5 and R6 may be bonded to each other to form a ring; n represents 2 to 4 when X represents NRa, and represents 0 to 4 when X represents O or S; and q represents 0 to 3, r and s each independently represent 0 to 4.) Arc represents an aryl group, or is represented by the formula (III).]
- -
-
Page/Page column 121
(2012/07/03)
-
- NOVEL COMPOUND AND ORGANIC ELECTRONIC DEVICE USING SAME
-
The present invention relates to a novel compound and an organic light emitting device using the compound, and the compound according to the present invention may largely improve a life span, efficiency, electrochemical stability and thermal stability of the organic light emitting device.
- -
-
Page/Page column 35-36
(2011/08/03)
-
- Organic light emitting device containing naphthoindole derivatives
-
The present invention provides a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltages, high brightness and long lifespans.
- -
-
Page/Page column 23-24
(2011/04/24)
-
- ELECTROLUMINESCENT COMPOUNDS WITH HIGH EFFICIENCY AND ORGANIC LIGHT-EMITTING DIODE USING THE SAME
-
The present invention relates to novel organic electroluminescent compounds and an organic light-emitting diode comprising the same. The organic electroluminescent compounds according to the present invention exhibit high luminous efficiency and excellent life property as a material, so that an OLED device having very good operation life can be prepared therefrom.
- -
-
Page/Page column 13
(2011/07/06)
-
- Synthesis and photophysical properties of pyrrole/polycyclic aromatic units hybrid fluorophores
-
A series of pyrrole/polycyclic aromatic unit hybrid fluorophores was developed by a two-stage synthetic strategy. Their central aryl-substituted pyrrole cores were constructed by a Paal-Knorr pyrrole synthesis reaction. The reaction conditions and mechanism are also discussed in detail. End-capping triflate onto the central pyrrole core enables the core to incorporate various polycyclic aromatic units. The Buchwald-Hartwig amination reaction and the Suzuki-Miyaura cross-coupling reaction were adopted to incorporate the triflate end-capping pyrrole with N-phenylnaphthalen-1-amine and various polycyclic aromatic units to form the hybrid fluorophores. The photophysical properties and thermal properties of the fluorophores were characterized. Most of the pyrrole fluorophores emitted blue light and exhibited high quantum efficiency. The fluorescence properties of these pyrrole fluorophores were induced by manipulating the surrounding polycyclic aromatic units. When the central pyrrole core was incorporated with amino or naphthalene moieties, the fluorescence efficiency and thermal stability of fluorophores 1 and 2 were low (φf g f > 0.99) and stable glassy morphology (the Tg value of the fluorophore 6 was as high as 220 °C). Results of this study demonstrate that the sterically induced fluorescence of crowded pyrrole and the fluorescent polycyclic aromatic units significantly affect the emission properties of the hybrid fluorophores.
- Li, Chang-Shun,Tsai, Ya-Hsuan,Lee, Wei-Chen,Kuo, Wen-Jang
-
supporting information; experimental part
p. 4004 - 4013
(2010/08/19)
-
- 3,4-Bis(5-iodo-2-methylthien-3-yl)-2,5-dihydrothiophene: A powerful synthon for the preparation of photochromic dithienylethene derivatives
-
A dithienylethene synthon, 3,4-bis-(5-iodo-2-methylthien-3-yl)-2,5- dihydrothiophene, was prepared and used as a starting material for the preparation of several photochromic dithienylethene derivatives via Suzuki cross-coupling reactions. The dithienylethene synthon was stable once stored in the dark at room temperature. Georg Thieme Verlag Stuttgart.
- Xie, Nan,Zeng, De Xing,Chen, Yi
-
p. 737 - 740
(2007/10/03)
-
- Homoleptic Cyclometalated Iridium Complexes with Highly Efficient Red Phosphorescence and Application to Organic Light-Emitting Diode
-
Phosphorescence studies of a series of facial homoleptic cyclometalated iridium(III) complexes have been carried out. The complexes studied have the general structure Ir(III)(C-N)3, where (C-N) is a monoanionic cyclometalating ligand: 2-(5-methylthiophen-2-yl)pyridinato, 2-(thiophen-2-yl)-5-trifluoromethylpyridinato, 2,5-di(thiophen-2-yl)pyridinato, 2,5-di(5-methylthiophen-2-yl)pyridinato, 2-(benzo[b]thiophen-2-yl)pyridinato, 2-(9,9-dimethyl-9H-fluoren-2-yl)pyridinato, 1-phenylisoquinolinato, 1-(thiophen-2yl)isoquinolinato, or 1-(9,9-dimethyl-9H-fluoren-2-yl)isoquinolinato. Luminescence properties of all the complexes at 298 K in toluene are as follows: quantum yields of phosphorescence φp = 0.08-0.29, emission peaks λ max = 558-652 nm, and emission lifetimes τ = 0.74-4.7 μs. Bathochromic shifts of the Ir(thpy)3 family [the complexes with 2-(thiophen-2-yl)pyridine derivatives] are observed by introducing appropriate substituents, e.g., methyl, trifluoromethyl, or thiophen-2-yl. However, φp of the red emissive complexes (λmax > 600 nm) becomes small, caused by a significant decrease of the radiative rate constant, kr. In contrast, the complexes with the 1-arylisoquinoline ligands are found to have marked red shifts of λmax and very high φp (0.19-0.26). These complexes are found to possess dominantly 3MLCT (metal-to-ligand charge transfer) excited states and have kr values approximately 1 order of magnitude larger than those of the Ir(thpy)3 family. An organic light-emitting diode (OLED) device that uses Ir(1-phenylisoquinolinato)3 as a phosphorescent dopant produces very high efficiency (external quantum efficiency ηex = 10.3% and power efficiency 8.0 Im/W at 100 cd/m2) and pure-red emission with 1931 CIE (Commission Internationale de L'Eclairage) chromaticity coordinates (x = 0.68, y = 0.32).
- Tsuboyama, Akira,Iwawaki, Hironobu,Furugori, Manabu,Mukaide, Taihei,Kamatani, Jun,Igawa, Satoshi,Moriyama, Takashi,Miura, Seishi,Takiguchi, Takao,Okada, Shinjiro,Hoshino, Mikio,Ueno, Kazunori
-
p. 12971 - 12979
(2007/10/03)
-