A series of novel polyamides (PAs) bearing substituted carbazole and imidazole rings in the main-chain
were successfully synthesized via direct phosphorylation polycondensation between a new diamine, 5,5'-(9-octyl-9Hcarbazole-
3,6-diyl)bis[4-phenyl-2-(4-amino-phenyl)-1H-imidazole], and various commercially available dicarboxylic
acids. All intermediates and polymers were fully characterized by FTIR, NMR, and elemental analysis. These polymers
were obtained in good yields with inherent viscosities of 0.42-0.55 dL/g and number average molecular
weights (Mn) in the range of 24875-31720 g/mol (MWD=1.57-2.5). They exhibited excellent solubility in common
polar aprotic organic solvents. These polymers had high glass transition temperatures (Tg)s (204-309 oC) and their
temperatures at 10% weight loss (T10%) were found to be in the range of 404-511 oC in nitrogen. They exhibited
strong UV absorption with maxima at 320-335 nm, and their photoluminescence (PL) efficiency was affected by
their chemical structure; PL quantum yields were in the range of 4%-34%. The aliphatic PAs emitted blue light at
λ
e.max=465 nm, while the aromatic PAs emitted green light at λ
e.max=490-510 nm in NMP solution
