| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polymer having high carrier injecting properties, transportability, emission luminance, luminous efficiency and color purity in an electroluminescent element. SOLUTION: The new polymer is represented by formula (I) (wherein, R denotes a >=7C alkyl group; (n) denotes a number of >=5; R<2> denotes a substituent group; a's denote each independently a number of 0-3; and Cb denotes an aromatic hydrocarbon group).
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