339576-55-5Relevant articles and documents
Synthesis and electronic spectroscopy of bromocarbazoles. Direct bromination of N- and C-substituted carbazoles by N-bromosuccinimide or a N-bromosuccinimide/silica gel system
Ponce, Maria B.,Cabrerizo, Franco M.,Bonesi, Sergio M.,Erra-Balsells, Rosa
, p. 1123 - 1139 (2006)
The preparation, isolation and characterization by elemental analysis and 1H-NMR, 13C-NMR, and MS data of the bromo derivatives of N-substituted carbazoles, i.e., of 9-methyl-9H-carbazole (1), 9-phenyl-9H-carbazole (2), 9-benzyl-9H-carbazole (3), 2-methoxy-9-methyl-9H- carbazole (4), and of C-substituted carbazoles, i.e., of 2-(acetyloxy)-9H- carbazole (5) and 3-nitro-9H-carbazole (6), are reported, in part for the first time. As brominating reagents, N-bromosuccinimide (NBS) or NBS/silica gel in CH2Cl2, NBS in AcOH, KBrO3/KBr in EtOH doped with a catalytic amount of H2SO4, or KBrO3/KBr in AcOH were employed, and their uses were compared. Semi-empirical PM3 calculations were performed to predict the reactivity of the N-substituted and C-substituted carbazoles and of their bromo derivatives and found to verify the experimental results. The UV-absorption and fluorescence and phosphorescence emission spectra of the bromocarbazole derivatives in MeCN solution at 298 K and in a solid matrix at 77 K were compared with those of the corresponding carbazoles 1-6. The dynamic properties of the lowest excited singlet and triplet states (τf, τp, φf, and φp) were measured under the same experimental conditions. The intramolecular spin-orbital-coupling effect of the Br-atom and NO2 group on the spectroscopic data, photophysical parameters, and on the photo reactivity were also briefly analyzed.
COMPOUND FOR ORGANIC ELECTROLUMINESCENT DEVICE AND ORGANIC ELECTROLUMINESCENT DEVICE HAVING THE SAME
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, (2012/01/12)
The present invention provides a compound of formula (I) for an organic electroluminescent device: wherein X and Y are each independently selected for the group consisting of an alkyl substituted, aryl substituted or unsubstituted carbazole, indolocarbazole, triphenylsilyl and diphenylphosphine oxide represented by formula (A), (B), (C), (D) or (E), in which R1, R2, and R3 are each independently selected from the group consisting of a hydrogen, an alkyl having 1 to 15 carbons atoms, an aryl group having 6 to 15 carbons atoms, an alkyl substituted, an aryl substituted or unsubstituted triphenylsilyl, and a diphenylphosphine oxide represented by the formula (D) or (E); m and n are each independently 0 or 1, provided that m+n is 1 or more; and Ar1 and Ar2 are each independently selected from the group consisting of an alkyl substituted, aryl substituted or unsubstituted phenyl, tolyl, naphthyl, fluorenyl, anthracenyl, and phenanthryl.
