To provide a metal complex which is useful for production of a light emitting device excellent in external quantum efficiency.
A metal complex represented by the formula (1):
[M represents an iridium atom and the like; n1 is an integer of 1 or more; n1+n2 is 3; E1 and E2 are each a nitrogen atom or a carbon atom; Ring L1 represents an aromatic hetero ring; Ring L2 represents an aromatic hydrocarbon ring or an aromatic hetero ring; A1-G1-A2 represents an anionic bidentate ligand. Ring L1 or Ring L2 has a group represented by the formula (2).]
[R3 represents an alkyl group or the like; R4 to R8 are each a hydrogen atom, an alkyl group and the like; X represents an arylene group or the like; k1 represents an integer of 0 to 3. When the metal complex represented by the formula (1) has only one type of the group represented by the formula (2), the requirement (i) and the like are satisfied.
(i) Ring L1 is a monocyclic 5-membered aromatic hetero ring; and, at least one of Ring L2 has the group represented by the formula (2) in which one of R3 is a phenyl group, R4 is a hydrogen atom, and R3 and R4 are combined to form a fluorene ring.].
提供一种
金属络合物,用于生产外部量子效率极佳的发光器件。
一种由式(1)表示的
金属配合物:
[M 代表
铱原子等;n1 为 1 或 1 以上的整数;n1+n2 为 3;E1 和 E2 各为氮原子或碳原子;环 L1 代表芳香杂环;环
L2 代表
芳香烃环或芳香杂环;A1-G1-A2 代表阴离子双齿
配体。环 L1 或环
L2 具有由式 (2) 所代表的基团]。
[当式(1)所代表的
金属配合物只有一种式(2)所代表的基团时,则满足(i)等要求。
(i) 环 L1 是单环 5 元芳香杂环;且环
L2 中至少有一个具有式 (2) 所代表的基团,其中 R3 之一是苯基,R4 是氢原子,且 R3 和 R4 结合形成
芴环]。