申请人:JNC Corporation
公开号:US07964293B2
公开(公告)日:2011-06-21
A compound represented by the following Formula (1) is useful as an electron transport material of an organic EL device, and an organic EL device comprising the compound in the electron transport layer is long in life, and low in drive voltage:
wherein G is an n-valent link, n is an integer of 2 to 4; R1 to R4 are each independently hydrogen, a monovalent group, or a free valency bonded with G, and R5 to R8 are each independently hydrogen or a monovalent group, and one of R1 to R4 is a free valency bonded with G; and n groups of 2,3′-bipyridyl may be the same or different with each other.
下列化合物的化学式(1)作为有机EL器件的电子传输材料非常有用,其中包含该化合物的电子传输层的有机EL器件寿命长,驱动电压低:其中G是n价键,n是2至4的整数;R1至R4各自独立地是氢、一价基团或与G结合的自由价,而R5至R8各自独立地是氢或一价基团,其中R1至R4中的一个是与G结合的自由价;而n个2,3'-联吡啶基团可以相同或不同。