453530-49-9Relevant articles and documents
Chromium-Catalyzed Reductive Cleavage of Unactivated Aromatic and Benzylic C-O Bonds
Yuan, Shuqing,Ling, Liang,Tang, Jinghua,Luo, Meiming,Zeng, Xiaoming
supporting information, p. 3343 - 3350 (2021/07/02)
Reductive cleavage of aromatic and benzylic C-O bonds by chromium catalysis is reported. This deoxygenative reaction was promoted by low-cost CrCl 2precatalyst combined with poly(methyl hydrogen siloxane) as the mild reducing agent, providing a strategy in forming reduced motifs by cleavage of unactivated C-O bonds. A range of functional groups such as bromide, chloride, fluoride, hydroxyl, amino, and alkoxycarbonyl can be retained in the reduction.
The iridium complex compound, said compound and solvent-containing composition, the compound comprises an organic electroluminescent device, display device and illuminating device
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Paragraph 0160; 0161, (2017/08/02)
PROBLEM TO BE SOLVED: To provide an iridium complex compound having enough dissolubility to an organic solvent to manufacture an element by an application method, wherein a driving voltage of an organic electroluminescent element manufactured by using a composition containing the compound and an organic solvent is small, and to provide the organic electroluminescent element containing the iridium complex compound having low driving voltage, and a display device and a lighting device using the organic electroluminescent element.SOLUTION: An iridium complex compound represented by the formula (1) improves dissolubility to organic solvents and an element manufactured by using the iridium complex compound has low driving voltage. In the formula (1), (A) represents a benzene ring, (B) represents a heteroaromatic ring having at least one nitrogen atom, and at least one substituent constituting Rand Rhas a structure in which 3 or more arylene groups are connected in series.
A pyridine phongl as the nuclear in the three compounds and methods for their preparation and use
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, (2016/11/02)
The invention belongs to the technical field of organic electroluminescence materials, and discloses a compound using tripyridylbenzene as a core as well as a preparation method and application thereof. The compound can be prepared by synthesizing a halog
Synthesis, photophysics, and reverse saturable absorption of 7-(benzothiazol-2-yl)-9,9-di(2-ethylhexyl)-9: H -fluoren-2-yl tethered [Ir(bpy)(ppy)2]PF6 and Ir(ppy)3 complexes (bpy = 2,2′-bipyridine, ppy = 2-phenylpyridine)
Li, Zhongjing,Li, Hui,Gifford, Brendan J.,Peiris, Wadumesthrige D. N.,Kilina, Svetlana,Sun, Wenfang
, p. 41214 - 41218 (2016/05/19)
We report the synthesis, photophysics, and reverse saturable absorption of five iridium(iii) complexes 1-5 with 7-(benzothiazol-2-yl)-9,9-di(2-ethylhexyl)-9H-fluoren-2-yl (BTF) pendant attached to the 2-phenylpyridine ligand (1: [Ir(bpy)(BTF-ppy)2]PF6; 2: [Ir(bpy)(BTF - ppy)2]PF6; 3: Ir(ppy)2(BTF-ppy); 4: Ir(ppy)(BTF-ppy)2; 5: (BTF-ppy)3, where bpy = 2,2′-bipyridine and ppy = 2-phenylpyridine). The effects of the extended π-conjugation of the ppy ligand and the increased number of BTF-ppy ligand, as well as the effects of neutral complex vs. cationic complex were evaluated. All complexes exhibit predominantly ligand-localized 1π,π? transitions below 430 nm and charge-transfer transitions between 430 and 550 nm. They all emit at room temperature and at 77 K, mainly from the metal-to-ligand charge transfer (3MLCT)/ligand-to-ligand charge transfer (3LLCT) states for 1 and 2, and from the BTF-ppy ligand-centered 3π,π? excited states with significant contributions from the 3MLCT states for 3-5. The triplet excited states of 1-5 also manifest broad transient absorption (TA) in the visible to the near-IR spectral region. The electronic absorption, emission, and ns transient absorption are all red-shifted by extending the π-conjugation of the ppy ligand or increasing the number of BTF-ppy ligand. The energies of the lowest singlet and triplet excited states of the neutral complex 4 are lowered compared to those of its cationic counterpart 1; while the transient absorbing triplet excited state of 4 is much longer lived than that of 1. These complexes all exhibit strong reverse saturable absorption (RSA) for ns laser pulses at 532 nm, with a trend of 5 ex/σ0) at 532 nm with the triplet quantum yield also playing a role for complexes 3-5. It appears that the increased number of BTF-ppy ligand reduces the RSA of the neutral complexes while the increased π-conjugation of the ppy ligand in the cationic complexes improves the RSA. However, the neutral complex 4 exhibits a weaker RSA at 532 nm than its cationic counterpart 1.
Directed meta-Selective Bromination of Arenes with Ruthenium Catalysts
Yu, Qingzhen,Hu, Le'An,Wang, Yue,Zheng, Shasha,Huang, Jianhui
, p. 15284 - 15288 (2016/01/25)
A Ru-catalyzed direct C?H activation/meta-bromination of arenes bearing pyridyl, pyrimidyl, and pyrazolyl directing groups has been developed. A series of bromo aryl pyridines and pyrimidines have been synthesized, and further coupling reactions have also been demonstrated for a number of representative functionalized arenes. Preliminary mechanistic studies have revealed that this reaction may proceed through radical-mediated bromination when NBS is utilized as the bromine source. This type of transformation has opened up a new direction for the radical non-ipso functionalization of metal with regard to future C?H activation development that would allow the remote functionalization of aromatic systems.
PHOSPHORESCENT MATERIALS
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, (2015/11/16)
Novel organic compounds containing a twisted aryl group are provided. In particular, the compounds provided contain a 2-phenylpyridine ligand having a twisted aryl group on the pyridine portion of the ligand. The compounds may be used in organic light emitting devices, particularly as emitting dopants. Devices comprising the compounds containing twisted aryl may demonstrate improved color, efficiency, stability and manufacturing. Additionally, methods are provided for making homoleptic Ir (III) compounds which may contain a twisted aryl.
IRIDIUM COMPLEX COMPOUND, SOLUTION COMPOSITION CONTAINING IRIDIUM COMPLEX COMPOUND, ORGANIC ELECTROLUMINESCENT ELEMENT, DISPLAY DEVICE, AND LIGHTING DEVICE
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Paragraph 0251, (2014/12/09)
The present invention is to provide an iridium complex compound, which is soluble in an organic solvent, which can be stored for long periods without reprecipitation thereof and which secures a low driving voltage and a high luminescent efficiency of an organic electroluminescent element produced using the compound, to provide an organic electroluminescent element containing the compound and to provide a display and a lighting using the organic electroluminescent element. The present invention relates to the iridium complex compound having a specific chemical structure. Further, the invention also relates to the organic electroluminescent element produced using the compound, which requires a low operating voltage and has a long operating lifetime.
CYCLOMETALATED TRANSITION METAL DYES
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Page/Page column 59, (2012/12/13)
The present invention provides substituted cyclometalated dyes with wider absorbance bands in the visible spectrum. The compounds have hexacoordinate structures as shown in formula (I) where the central transition metal (M) is bonded to two substituted bi
Synthesis and characterization of solution-processable highly branched iridium (III) complex cored dendrimer based on tetraphenylsilane dendron for host-free green phosphorescent organic light emitting diodes
Kim, Seul-Ong,Zhao, Qinghua,Thangaraju,Kim, Jang Joo,Kim, Yun-Hi,Kwon, Soon-Ki
, p. 139 - 145 (2011/12/04)
Solution processable highly branched iridium(III) complex fac-tris(2-phenylpyridyl)iridium-cored dendrimer based on tetraphenylsilane dendron and 2-ethylhexyloxy surface groups was prepared. The structure of dendrimer was confirmed by nuclear magnetic resonance, mass and infrared studies. Thermogravimetric analysis and differential scanning calorimetry studies show the thermal stability (T5%) of 625 K with high glass transition temperature of 423 K. Photoluminescence studies of dendrimer showed the core emission at 516 nm in solution and at 521 nm in film, indicating the highly branched non-conjugated tetrahedral tetraphenylsilane dendrons around the core highly inhibit the intermolecular interactions between the cores in the film. The solution processed green emitting phosphorescent organic light emitting diodes based on dendrimer were fabricated and characterized. The device using host free dendrimer as emitter showed the external quantum efficiency of 0.4%. The results show the potential of this new type of dendritic emitting structure in highly efficient solution processed host-free green phosphorescent organic light emitting diodes.
Cyclometalated ru complexes of type [RuII(N^N) 2(C^N)]z: Physicochemical response to substituents installed on the anionic ligand
Bomben, Paolo G.,Koivisto, Bryan D.,Berlinguette, Curtis P.
experimental part, p. 4960 - 4971 (2010/07/08)
The electrochemical and photophysical properties of a series ofRu(II) complexes related to [Ru(dcbpyH2)2(ppy)]1+ (1; dcbpy-H2 = 4,4′-dicarboxy-2,2′-bipyridine; ppy = 2-phenylpyridine) were examined to elucidate
