The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Wai Yeung Wong - One of the best experts on this subject based on the ideXlab platform.
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synthesis characterization and electroluminescent properties of iridium iii 2 Phenylpyridine type complexes containing trifluoromethyl substituents and various main group moieties
Israel Journal of Chemistry, 2014Co-Authors: Ching Shan Lam, Ning Sun, Li Liu, Liqin Xue, Zhenyang Lin, Wai Yeung WongAbstract:New heteroleptic cyclometalated iridium(III) 2-Phenylpyridine-type complexes with trifluoromethyl substituents and various main-group moieties were synthesized and their photophysical, electrochemical, and electroluminescent (EL) properties studied. The emission color can be tuned by a facile derivatization of the phenyl moiety of 2-Phenylpyridine with various main-group moieties, and we have prepared new yellowishgreen to orange triplet emitters with enhanced charge injection/charge transporting features, which can furnish attractive EL performance in phosphorescent organic light-emitting devices (OLEDs). Attempts were also made to fabricate two-color white-light OLEDs based on a combination of fluorescent blue and phosphorescent orange emitters.
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effective phosphorescence quenching in borylated ptii ppy type phosphors and their application as i ion sensors in aqueous medium
Chemical Communications, 2013Co-Authors: Xiaolong Yang, Zuan Huang, Jingshuang Dang, Guijiang Zhou, Wai Yeung WongAbstract:The first example of phosphorescent I− ion sensors based on borylated PtII ppy-type phosphors (Hppy = 2-Phenylpyridine) was reported, which shows good selectivity and sensitivity.
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robust tris cyclometalated iridium iii phosphors with ligands for effective charge carrier injection transport synthesis redox photophysical and electrophosphorescent behavior
Chemistry-an Asian Journal, 2008Co-Authors: Guijiang Zhou, Wai Yeung Wong, Qi Wang, Cheuklam Ho, Lixiang WangAbstract:With the target to design and develop new functionalized green triplet light emitters that possess distinctive electronic properties for robust and highly efficient phosphorescent organic light-emitting diodes (PHOLEDs), a series of bluish-green to yellow-green phosphorescent tris-cyclometalated homoleptic iridium(III) complexes [Ir(ppy-X)(3)] (X=SiPh3, GePh3, NPh2, POPh2, OPh, SPh, SO2Ph, Hppy=2-Phenylpyridine) have been synthesized and fully characterized by spectroscopic, redox, and photophysical methods
Frank Glorius - One of the best experts on this subject based on the ideXlab platform.
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rh iii catalyzed dehydrogenative alkylation of hetero arenes with allylic alcohols allowing aldol condensation to indenes
ChemInform, 2013Co-Authors: Zhuangzhi Shi, Melissa Boultadakisarapinis, Frank GloriusAbstract:The dehydrogenative cross-coupling of indoles (I) and 2-Phenylpyridine (IV) with allylic alcohols (II) affords β-aryl carbonyl compounds as sole products.
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rh iii catalyzed dehydrogenative alkylation of hetero arenes with allylic alcohols allowing aldol condensation to indenes
Chemical Communications, 2013Co-Authors: Zhuangzhi Shi, Melissa Boultadakisarapinis, Frank GloriusAbstract:Efficient Rh(III)-catalyzed C–H activation of different classes of (hetero)arenes such as 2-Phenylpyridine, indoles, aryl ketones and acetanilide and their dehydrogenative cross-coupling with allylic alcohols are described. Several important skeletons such as β-aryl aldehydes and ketones, 2-acetylindenes, 3,4-dihydro-1H-quinolin-2-one and quinoline could be produced using this protocol.
Stefan Bernhard - One of the best experts on this subject based on the ideXlab platform.
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highly fluorinated ir iii 2 2 6 2 terpyridine Phenylpyridine x complexes via selective c f activation robust photocatalysts for solar fuel generation and photoredox catalysis
Journal of the American Chemical Society, 2016Co-Authors: Jonathan A Porras, Isaac N Mills, Wesley J Transue, Stefan BernhardAbstract:A series of fluorinated Ir(III)–terpyridine–Phenylpyridine–X (X = anionic monodentate ligand) complexes were synthesized by selective C–F activation, whereby perfluorinated Phenylpyridines were readily complexed. The combination of fluorinated Phenylpyridine ligands with an electron-rich tri-tert-butyl terpyridine ligand generates a “push–pull” force on the electrons upon excitation, imparting significant enhancements to the stability, electrochemical, and photophysical properties of the complexes. Application of the complexes as photosensitizers for photocatalytic generation of hydrogen from water and as redox photocatalysts for decarboxylative fluorination of several carboxylic acids showcases the performance of the complexes in highly coordinating solvents, in some cases exceeding that of the leading photosensitizers. Changes in the photophysical properties and the nature of the excited states are observed as the compounds increase in fluorination as well as upon exchange of the ancillary chloride liga...
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efficient yellow electroluminescence from a single layer of a cyclometalated iridium complex
Journal of the American Chemical Society, 2004Co-Authors: Jason D Slinker, Michael S Lowry, Sara T Parker, Richard Rohl, Stefan Bernhard, Alex A. Gorodetsky, Jingjing Wang, George G MalliarasAbstract:We report on the spectroscopic, electrochemical, and electroluminescent properties of [Ir(ppy)2(dtb-bpy)]+(PF6)- (ppy: 2-Phenylpyridine, dtb-bpy: 4,4‘-di-tert-butyl-2,2‘-dipyridyl). Single-layer devices were fabricated and found to emit yellow light with a brightness that exceeds 300 cd/m2 and a luminous power efficiency that exceeds 10 Lm/W at just 3 V. The PF6- space charge was found to dominate the device characteristics.
Junji Kido - One of the best experts on this subject based on the ideXlab platform.
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2 phenylpyrimidine skeleton based electron transport materials for extremely efficient green organic light emitting devices
Chemical Communications, 2008Co-Authors: Hisahiro Sasabe, Takayuki Chiba, Kenichi Nakayama, Junji KidoAbstract:2-Phenylpyrimidine skeleton-based multifunctional electron-transport materials are designed and synthesized. By using these materials and green phosphorescent emitter, fac-tris(2-Phenylpyridine)iridium [Ir(ppy)3], extremely efficient green organic light-emitting devices are developed. The devices show the efficiencies of 128 lm W−1 (105 cd A−1) at 100 cd m−2 and 96 lm W−1 (99 cd A−1) at 1000 cd m−2.
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novel four pyridylbenzene armed biphenyls as electron transport materials for phosphorescent oleds
Organic Letters, 2008Co-Authors: Daisaku Tanaka, Hisahiro Sasabe, Takashi Takeda, Junji KidoAbstract:A series of four-pyridylbenzene-armed biphenyl derivatives were designed and synthesized as an electron-transport and exciton- and hole-block layer for the fac-tris(2-Phenylpyridine)iridium (Ir(PPy)3)-based green phosphorescent organic light-emitting devices (OLEDs), giving improved efficiency in comparison to that with both the electron-transport layer of tris(8-hydroxyquinoline)aluminum (Alq3) and the exciton- and hole-block layer of 2,9-dimethyl-4,7-diphenylphenathroline (BCP).
Zhuangzhi Shi - One of the best experts on this subject based on the ideXlab platform.
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rh iii catalyzed dehydrogenative alkylation of hetero arenes with allylic alcohols allowing aldol condensation to indenes
ChemInform, 2013Co-Authors: Zhuangzhi Shi, Melissa Boultadakisarapinis, Frank GloriusAbstract:The dehydrogenative cross-coupling of indoles (I) and 2-Phenylpyridine (IV) with allylic alcohols (II) affords β-aryl carbonyl compounds as sole products.
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rh iii catalyzed dehydrogenative alkylation of hetero arenes with allylic alcohols allowing aldol condensation to indenes
Chemical Communications, 2013Co-Authors: Zhuangzhi Shi, Melissa Boultadakisarapinis, Frank GloriusAbstract:Efficient Rh(III)-catalyzed C–H activation of different classes of (hetero)arenes such as 2-Phenylpyridine, indoles, aryl ketones and acetanilide and their dehydrogenative cross-coupling with allylic alcohols are described. Several important skeletons such as β-aryl aldehydes and ketones, 2-acetylindenes, 3,4-dihydro-1H-quinolin-2-one and quinoline could be produced using this protocol.
