870119-42-9Relevant articles and documents
Soluble polynorbornenes with pendant carbazole derivatives as host materials for highly efficient blue phosphorescent organic light-emitting diodes
Park, Jun Ha,Koh, Tae-Wook,Do, Youngkyu,Lee, Min Hyung,Yoo, Seunghyup
, p. 2356 - 2365 (2012)
We report novel host polymers for a high-efficiency polymer-based solution-processed phosphorescent organic light-emitting diode with typical blue-emitting dopant bis(4,6-difluorophenylpyridinato-N,C2) iridium(III) picolinate (FIrpic). The host
ORGANIC ELECTROLUMINESCENT MATERIALS AND DEVICES
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Paragraph 0130; 0131, (2017/02/09)
A compound having a structure of Formula I: is provided. In the structure of Formula I, each one of X1 to X16 is independently CRX or N; each RX and R are independently selected from the group consisting of hydr
Site-Selective N-Arylation of Carbazoles with Halogenated Fluorobenzenes
Wang, Lei,Ji, Enhui,Liu, Ning,Dai, Bin
, p. 737 - 750 (2016/02/27)
A method for the highly site-selective C-N bond-formation reaction of halogenated fluorobenzenes with carbazoles is described. The selectivity of iodine and fluorine atoms on the aromatic ring of fluorinated iodobenzenes was initially determined with a copper-N,N-diisopropylethylamine catalytic system. By changing the position of the iodine atom on the aromatic ring from the 3- or 4-position to the 2-position, the preferred coupling site was switched from the iodine atom to the fluorine atom. Steric hindrance of the fluorinated iodobenzenes is responsible for the selectivity switch. After elucidating the reaction mechanisms of these reaction processes, a metal-free method for the highly site-selective C-N bond-formation reaction of halogenated fluorobenzenes with carbazoles was revealed through C-F bond activation. The metal-free system is able to handle a range of halogenated groups. Thus, a broad range of chlorinated, brominated, and iodinated N-arylated carbazoles were generated, which are widely useful in organic chemistry.