1003298-73-4Relevant articles and documents
C1-, C2-, and C3-Modified Carbazole Derivatives as Promising Host Materials for Phosphorescent Organic Light-Emitting Diodes
Konidena, Rajendra Kumar,Chung, Won Jae,Lee, Jun Yeob
, p. 2786 - 2790 (2020)
Herein we unveiled the synthetic approach to C1-, C2-, and C3-modified carbazoles for the first time and designed high-triplet-energy bipolar host materials for green phosphorescent organic light-emitting devices. The compounds revealed excellent performa
Two-channel emission controlled by a conjugation valve for the color switching of thermally activated delayed fluorescence emission
Konidena, Rajendra Kumar,Lee, Kyung Hyung,Lee, Jun Yeob
, p. 9908 - 9916 (2019)
The development of two-channel emission featuring deep-blue thermally activated delayed fluorescent (TADF) emitters is highly challenging due to their unavoidably extended conjugated structures. Herein, we propose a simple and effective strategy involving engineering of the interconnection position and formation of a "conjugation valve" to control their emission colors, including enabling emission of deep-blue light with an uncompromised external quantum efficiency (EQE). Two novel TADF emitters, namely 2,3′,4,5′-tetra(9H-carbazol-9-yl)-[1,1′-biphenyl]-3,4′-dicarbonitrile (34CzBN) and 3,3′,5,5′-tetra(9H-carbazol-9-yl)-[1,1′-biphenyl]-4,4′-dicarbonitrile (44CzBN), were developed to produce a two-channel-emission path by directly connecting two identical TADF units in two different ways to produce different degrees of conjugation. The non-conjugative mode of connection in 34CzBN resulted in severe steric hindrance at the central core, which interrupted the extensive conjugation and resulted in significant blue-shifts of the absorption and emission compared to those of its isomer 44CzBN. The two-channel-emission process provided a four-times higher EQE than the single-channel-emission process. The 34CzBN-based TADF device demonstrated deep-blue emission with color coordinates of (0.14, 0.14) due to a closed conjugation channel, and displayed an EQE of 15.2%. In contrast, the 44CzBN device showed green emission with color coordinates of (0.20, 0.44), due to the open conjugation channel, and an EQE of 13.8%. Additionally, the emission peak in the spectrum of the 34CzBN-based device became narrow (full width at half-maximum of ~63 nm) due to restricted molecular motion resulting from the interlocked carbazole donor at the central core.
COMPOSITION OF MATTER FOR USE IN ORGANIC LIGHT-EMITTING DIODES
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Page/Page column 191-192, (2019/10/19)
The present disclosure relates to compounds capable of emitting delayed fluorescence, and uses of the compounds in organic light-emitting diodes.
ORGANIC MOLECULES FOR OPTOELECTRONIC DEVICES
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Page/Page column 39, (2020/01/08)
The invention relates to an organic molecule for the use in optoelectronic devices. According to the invention, the organic compound has - a first chemical moiety with a structure of formula (I) and - three second chemical moieties, each independently fro
BENZIIMIDAZOLE AND IMIDAZOPYRIDINE DERIVATIVES AS SODIUM CHANNEL MODULATORS
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Page/Page column 180, (2013/08/15)
The invention relates to benzimidazole and imidazopyridine derivatives, to their use in medicine, to compositions containing them, to processes for their preparation and to intermediates used in such processes. More particularly the invention relates to new Nav1.8 modulators of formula (I) or pharmaceutically acceptable salts thereof, wherein R1, R2, R3, R4, R5, R6, R7. X and Y are as defined in the description. Nav1.8 modulators are potentially useful in the treatment of a wide range of disorders, particularly pain.
CHEMICAL COMPOUNDS
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Page/Page column 205, (2010/07/10)
The invention is directed to 6-(4-pyι?midinyl)-1 H-indazole derivatives. Specifically, the invention is directed to compounds according to Formula (I) wherein R1 - R4 are defined herein. The compounds of the invention are inhibitors of PDK1 and can be useful in the treatment of immune and metabolic diseases and disorders characterized by constitutively activated ACG kinases such as cancer and more specifically cancers of the breast, colon, and lung. Accordingly, the invention is further directed to pharmaceutical compositions comprising a compound of the invention. The invention is still further directed to methods of inhibiting PDK1 activity and treatment of disorders associated therewith using a compound of the invention or a pharmaceutical composition comprising a compound of the invention.
PYRAZOLO [3, 4-D] PYRIMIDINE DERIVATIVES USEFUL TO TREAT RESPIRATORY DISORDERS
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Page/Page column 68-69, (2008/06/13)
The present invention concerns a compound of formula (I) or a pharmaceutically acceptable salt or solvate thereof, where R1-R3 and Y are defined in the description, and its use in the treatment of disorders in which pi3 kinase is imp