Nanosized palladium cluster-catalyzed Suzuki-Miyaura coupling polymerization of 1,1'-binaphthyldiyl-bearing diiodides with expanded pi-conjugated aromatic diboronic acid pinacol diesters affords aromatic polyketones, which have blue-emitting fluorescent properties (lambda (em) 450-489 nm) in addition to high thermal stability (T (g) 190-297 A degrees C) and excellent solubility in common organic solvents such as DMSO and NMP.