| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an organic electroluminescent element which has both of a higher luminance or light emission efficiency and a longer light emission life time using a compound having a biaryl group in which a bonding axis capable of giving an internal rotation isomerism exists. <P>SOLUTION: The electroluminescent element is a compound represented by general formula (C1), wherein Ar<SB>51</SB>represents an aryl group or an aromatic heterocyclic group, n represents an integer of 0-6, a plurality of Ar<SB>51</SB>may be the same or different when n is 2 or more, L<SB>21</SB>, L<SB>22</SB>, L<SB>23</SB>, L<SB>24</SB>, L<SB>25</SB>, and L<SB>26</SB>represent a group of atoms necessary to form a 6-member nitrogen-containing aromatic heterocyclic group, at least one of L<SB>21</SB>, L<SB>22</SB>, L<SB>23</SB>, L<SB>24</SB>, L<SB>25</SB>, and L<SB>26</SB>represents =N- or -N(R<SB>51</SB>), R<SB>51</SB>represents a hydrogen atom or a substituent, provided that at least one of Ar<SB>51</SB>and R<SB>51</SB>is a biaryl group having a bonding axis capable of giving an internal rotation isomerism or a group having such a biaryl group, and the adjacent substituents may be condensed with each other to form a saturated or unsaturated ring. <P>COPYRIGHT: (C)2011,JPO&INPIT |
