Synthesis and properties of 9,9-diarylfluorene-based triaryldiamines.
[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.
Wong
K T
KT
Department of Chemistry, National Taiwan University, Taipei 106, Taiwan. kenwong@ccms.ntu.edu.tw
Wang
Z J
ZJ
Chien
Y Y
YY
Wang
C L
CL