| abstract |
A polymeric fluorescent substance exhibiting visible fluorescence in the solid state, having polystyrene reduced number average molecular weight of 1×10 3 to 1×10 8 , and comprising one or more repeating units of following formula (1), n n n wherein Ar 1 and Ar 2 each independently represent an arylene group or the like; Ar 3 represents an aryl group or the like having one or more substituents of formula (2) as nuclear substitution; X represents —CR 1 ═CR 2 — or —C C—; and n is 0 or 1, n —Y—Ar 4 (2) n wherein Ar 4 represents an aryl group or the like; and Y represents —CR 3 ═CR 4 — or —C C—. n The triarylamine type polymeric fluorescent substance is excellent in quantum yield of fluorescence and in light emitting efficiency when made into a device. |