Patent ID: 7701129

Claim:
A polymeric fluorescent substance exhibiting fluorescence in the solid state, having a polystyrene reduced number-average molecular weight of 1×10 3 to 1×10 8 , and comprising one or more repeating units of formula (1) and one or more repeating units of formula (8), and the amount of repeating units represented by the formula (1) is 0.1 mol % or more and 50 mol % or less based on the total amount of the repeating units represented by the formulae (1) and (8), —Ar 1 —(CR 1 ═CR 2 ) n — (1) in the formula, Ar 1 is a divalent group represented by formula (1′); R 1 and R 2 each independently represent a group selected from a hydrogen atom, alkyl groups, aryl groups, monovalent heterocyclic compound groups and cyano group; and n=0, in the formula, R 1 ′ and R 2 ′ represent each independently a group selected from alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, alkylphenyl group, alkoxyphenyl group, aryloxy group, arylsilyl group, arylamino group, arylalkyl group, arylalkoxy group, arylalkylsilyl group, arylalkylamino group, arylalkenyl group, arylalkynyl group, monovalent heterocyclic compound group, and cyano group; m′ and n′ are integers of 0-3 each independently; however, m′ and n′ are not 0 simultaneously; when m′ is two or more, two or more R 1 ′ may be the same or different; when n′ is two or more, a plurality of R 2 ′ may be the same or different; moreover, R 1 ′ and R 2 ′ may be connected to form a ring, —Ar 2 —(CR 36 ═CR 37 ) n — (8) in the formula, Ar 2 represents a group represented by formula (2′), in the formula, R 3 ′ and R 4 ′ represent independently a group selected from a hydrogen atom, alkyl group, aryl group, and a heterocyclic compound group; R 5 ′ and R 6 ′ show each independently a group selected from alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, aryl group, aryloxy group, arylsilyl group, arylamino group, arylalkyl group, arylalkoxy group, arylalkylsilyl group, arylalkylamino group, arylalkenyl group, arylalkynyl group, monovalent heterocyclic compound group, and cyano group; k′ and l′ are integers of 0-3 each independently; when k′ is two or more, a plurality of R 5 ′ may be the same or different; when l′ is two or more, a plurality of R 6 ′ may be the same or different; R 3 ′-R 6 ′ may be connected to form a ring; R 36 and R 37 each independently represent a group selected from a hydrogen atom, alkyl groups, aryl groups, monovalent heterocyclic compound groups and a cyano group; and m=0.