The aromatic-aliphatic copolyamides were synthesized by condensation polymerization of aromatic diamine PPD (or APS, where PPD is p-phenylene diamine and APS is aminophenyl sulfone), aliphatic diamine HDA (or EDA, where HDA is hexanediamine and EDA is ethylenediamine), and TPC (where TPC is terephthalyl chloride) with different molar ratios of aromatic diamine to aliphatic diamine. The steady-state fluorescence of these condensed copolymers was investigated. These copolyamides exhibit strong blue-to-green fluorescence. (c) 2005 Wiley Periodicals, Inc.