A novel copolymer affording an efficient electroluminescent, comprises repeating units of formulae (1) and (2) below, repeating units (1) forming 0.01 to 50 mol% of the total of repeating units, and the weight average molecular weight calculated in terms of polystyrene measured according to gel permeation chromatography being 1,000 to 1,000,000:
in which formula (1), R₁ to R⁵ are each independently a hydrogen or fluroine atom or an alkyl alkoxy, dialkylamino, alkanoyloxy, alkyloxycarbonyl, aryl, cyano, alkanoyl or trifluoromethyl group; X represents a group O or NY (wherein Y represents a hydrogen atom or an alkyl or aryl group); n represents 0, 1 or 2; and R₆ represents a hydrogen atom or a methyl group.
一种能产生高效电致发光体的新型共聚物由下式(1)和(2)的重复单元组成,重复单元(1)占重复单元总数的 0.01 至 50 摩尔%,根据凝胶渗透色谱法测得的聚
苯乙烯重量平均分子量为 1,000 至 1,000,000 :
式(1)中,R₁至 R⁵ 各自独立地为氢原子或
氟原子或烷基烷氧基、二烷基
氨基、烷酰氧基、烷氧羰基、芳基、
氰基、烷酰基或三
氟甲基;X 代表基团 O 或 NY(其中 Y 代表氢原子或烷基或芳基);n 代表 0、1 或 2;R₆ 代表氢原子或甲基。