Blue-light-emitting polymers prepared from a new monomer having a well-defined conjugation length

New light-emitting polyimides were synthesized from the conventional polycondensation of 5,5′-bis(4-aminophenyl)-2,2′-bifuryl (PFDA) with fluorinated and non-fluorinated aromatic dianhydrides, providing a good quality of thin films: 6F-PFDA PI and ODPA-PFDA PI. Their UV–VIS absorbance and photoluminescent characteristics were investigated. The polymers emit blue and blue-greenish light in a quantum yield of 7.3–14.9%, depending on the polymer backbone.