- Pyrene-containing compound, preparation method thereof and organic light-emitting device
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The invention provides a pyrene-containing compound which has a structure as shown in formula 1 (FORMULA referring to the description), wherein X1 and X2 are oxygen (O) or sulfur (S); Y1 and Y2 are carbon (C) or nitrogen (N); and L1 is 0 or 1; and R1 and
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Paragraph 0024; 0025; 0027
(2018/11/22)
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- A fully integrated high-throughput screening methodology for the discovery of new polyolefin catalysts: Discovery of a new class of high temperature single-site group (IV) copolymerization catalysts
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For the first time, new catalysts for olefin polymerization have been discovered through the application of fully integrated high-throughput primary and secondary screening techniques supported by rapid polymer characterization methods. Microscale 1-octene primary screening polymerization experiments combining arrays of ligands with reactive metal complexes M(CH2Ph)4 (M = Zr, Hf) and multiple activation conditions represent a new high-throughput technique for discovering novel group (IV) polymerization catalysts. The primary screening methods described here have been validated using a commercially relevant polyolefin catalyst, and implemented rapidly to discover the new amide-ether based hafnium catalyst [η2- (N,O)-(2-MeO-C6H4) (2,4,6-Me3C6H2)N]Hf (CH2Ph)3 (1), which is capable of polymerizing 1-octene to high conversion. The molecular structure of 1 has been determined by X-ray diffraction. Larger scale secondary screening experiments performed on a focused 96-member amine-ether library demonstrated the versatile high temperature ethylene-1-octene copolymerization capabilities of this catalyst class, and led to significant performance improvements over the initial primary screening discovery. Conventional one gallon batch reactor copolymerizations performed using selected amide-ether hafnium compounds confirmed the performance features of this new catalyst class, serving to fully validate the experimental results from the high-throughput approaches described herein.
- Boussie, Thomas R.,Diamond, Gary M.,Goh, Christopher,Hall, Keith A.,LaPointe, Anne M.,Leclerc, Margarete,Lund, Cheryl,Murphy, Vince,Shoemaker, James A. W.,Tracht, Ursula,Turner, Howard,Zhang, Jessica,Uno, Tetsuo,Rosen, Robert K.,Stevens, James C.
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p. 4306 - 4317
(2007/10/03)
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- P(i-BuNCH2CH2)3N: An effective ligand in the palladium-catalyzed amination of aryl bromides and iodides
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It is shown that the bicyclic triaminophosphine P(i-BuNCH2CH2)3N serves as an effective ligand for the palladium-catalyzed amination of a wide array of aryl bromides and iodides. Other bicyclic or acyclic triaminophosphines, even those of similar basicity and/or bulk, were inferior.
- Urgaonkar, Sameer,Nagarajan,Verkade
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p. 452 - 459
(2007/10/03)
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- THE REACTION OF ORTHO-SUBSTITUTED AROMATIC AZIDES WITH BORON TRICHLORIDE OR TRIFLUORIDE
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The reactiont of boron trichloride or trifluoride with ortho-aryl, -diazoaryl, and -arylazoaryl phenyl azides in benzene at room temperature generally gives fused azoles in high yields.Treatment of 2-nitrophenyl azide with boron trichloride mainly affords chlorinated nitroanilines, whereas with boron trifluoride it gives N-o-nitrophenylaniline.In aromatic solvents at 60 deg C in the presence of boron trifluoride-diethyl ether, 2-azidobiphenyl forms carbazole and 2-(arylamino)biphenyls, the formation of which depends greatly upon the nucleophilicity of the solvent used; however, its pseudo-first-order decomposition rate is slightly greater in benzene than in toluene or m-xylene.Under the same conditions, phenyl azide forms diarylamines.The results suggest that singlet nitrenium ions, arising from the corresponding azidetrihalogenoborane complexes by loss of molecular nitrogen, are generally the reactive intermediates.
- Spagnolo, Piero,Zanirato, Paolo
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p. 2615 - 2620
(2007/10/02)
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