
248 HIGH PERFORMANCE POLYMERS
N
COOHHOOC
Figure 10.10
N
,
N
-di(4-carboxyphenyl)-1- aminopy-
rene.
weight-loss above 520
◦
C are found. In dilute solu-
tion, these polymers show a strong fluorescence with
emission maxima around 457–459 nm.
Copolymers from N,N-di(4-carboxyphenyl)-1-
aminopyrene and 4,4
-oxydibenzoic acid show a
significantly increased fluorescence quantum effi-
ciency. In addition, the polymers have ambipolar
electrochemical and electrochromic properties [60].
10.3.5 Solubility
Fully aromatic PODAs are not soluble in organic
solvents but only soluble in strong acids, such as sulfu-
ric acid, chlorosulfonic acid, or methanesulfonic acid.
However, by the ...