Synthesis of a high-efficiency red phosphorescent emitter for organic light-emitting diodes
摘要:
合成了四种新型红色磷光发射体化合物:双(1-苯基异喹啉-N,C2′)铱(乙酰丙酮),(piq)2Ir(acac)、双(1-(1′-萘基)异喹啉-N,C2′)铱(乙酰丙酮),(1-niq)2Ir(acac)、双(1-(2′-萘基)异喹啉-N,C2′)铱(乙酰丙酮),(2-niq)2Ir(acac)和双(1-苯基-5-甲基异喹啉-N,C2′)铱(乙酰丙酮),(m-piq)2Ir(acac),并对其进行了全面表征。制备了结构为ITO/NPB/CBP:掺杂剂/BCP/AlQ3/Al的电致发光器件。所有器件在红色区域发射,发射范围从624到680 nm。(m-piq)2Ir(acac)在电流密度J=300 mA cm−2时显示出最大亮度17164 cd m−2,在电流密度J=20 mA cm−2时显示出最佳亮度效率8.91 cd A−1。(1-niq)2Ir(acac)表现出纯红色发射,1931CIE(国际照明委员会)色度坐标x=0.701,y=0.273。
A Versatile Cyclodehydration Reaction for the Synthesis of Isoquinoline and β-Carboline Derivatives
作者:Mohammad Movassaghi、Matthew D. Hill
DOI:10.1021/ol801264u
日期:2008.8.21
beta-carboline derivatives via mild electrophilic amide activation, with trifluoromethanesulfonic anhydride in the presence of 2-chloropyridine, is described. Low-temperature amide activation followed by cyclodehydration upon warming provides the desired products with short overall reaction times. The successful use of nonactivated and halogenated phenethylene derived amides, N-vinyl amides, and optically active
Engineering an Enantioselective Amine Oxidase for the Synthesis of Pharmaceutical Building Blocks and Alkaloid Natural Products
作者:Diego Ghislieri、Anthony P. Green、Marta Pontini、Simon C. Willies、Ian Rowles、Annika Frank、Gideon Grogan、Nicholas J. Turner
DOI:10.1021/ja4051235
日期:2013.7.24
catalytic methods for the production of enantiomericallypure chiral amines is a key challenge facing the pharmaceutical and fine chemical industries. This challenge is highlighted by the estimate that 40-45% of drug candidates contain a chiral amine, fueling a demand for broadly applicable synthetic methods that deliver target structures in high yield and enantiomeric excess. Herein we describe the development
presented that gives direct access to 1,1-disubstitutedtetrahydroisoquinolines. The reaction is a titanium(III)-catalyzed reductive umpolung process in which nitriles act as effective acylation agents. The method is highly chemo- and regioselective and is demonstrated in 20 examples. It is well-suited for the large-scale synthesis of functionalized tetrahydroisoquinoline products, which is exemplified in
Visible-Light-Mediated Photocatalytic Aerobic Dehydrogenation of N-heterocycles by Surface-Grafted TiO<sub>2</sub> and 4-amino-TEMPO
作者:Narmina O. Balayeva、Nan Zheng、Ralf Dillert、Detlef W. Bahnemann
DOI:10.1021/acscatal.9b03322
日期:2019.12.6
dehydrogenation reaction. Both the selectivity and the yield are further enhanced by grafting 0.1 wt % of Ni(II) ions onto the TiO2 surface. It is proposed that the basic reactant adsorbs at Lewis acid sites present at the TiO2 surface. The dehydrogenation reaction is initiated by visible-light excitation of the resulting surface complex and a subsequent single-electron transferfrom the excited N-heterocycle
Synthesis and spectroscopic studies of some hydrogenated thiazolo[2,3- a ]isoquinolines
作者:Maria D Rozwadowska、Agnieszka Sulima
DOI:10.1016/s0040-4020(01)00224-1
日期:2001.4
4-dihydroisoquinoline derivatives under the action of α-mercapto alkanoic acids or ethylenesulfide, respectively. In the synthesis of compounds 2 and 5 isothiocarbostril (13) and N-thioacetyl-β-phenylethylamine derivatives (14), respectively, were also used as substrates and treated with bromoacetic acid derivatives. Spectral characteristics (IR, 1H, 13C NMR and MS) of compounds 1–12 are presented.