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Synthesis and properties of 9,9-diarylfluorene-based triaryldiamines
K T Wong1, Z J Wang, Y Y Chien
1Department of Chemistry, National Taiwan University, Taipei 106, Taiwan. kenwong@ccms.ntu.edu.tw
Organic Letters
|July 21, 2001
Abstract:
[reaction: see text] 9,9-Diaryl-2,7-dibromofluorene was synthesized by a triflic acid promoted Friedel-Crafts reaction. Introduction of diarylamino groups at its C2 and C7 positions by a Pd-catalyzed amination results in the formation of a novel class of triaryldiamines. The 9,9-diaryl substituents at the central linkage play a less important role in the photophyscial properties but affect the oxidation potential and improve the morphological stability of these new triarylamines.