The present invention provides a novel organometallic complex which emits green phosphorescence so as to enrich variations of phosphorescent materials for green color which is one of three primary colors. An organometallic complex comprising a structure represented by a general formula (G1) is provided.
In the formula, R
1
represents an alkyl group having 1 to 4 carbon atoms, and R
2
and R
3
individually represent hydrogen or an alkyl group having 1 to 4 carbon atoms. In addition, R
4
to R
7
individually represent an electron-withdrawing group, hydrogen or an alkyl group having 1 to 4 carbon atoms. Note that at least one of R
4
to R
7
represents an electron-withdrawing group. In addition, M is a central metal and represents either an element belonging to Group 9 in the periodic table or an element belonging to Group 10 in the periodic table.
本发明提供了一种新型的有机
金属配合物,其发出绿色荧光,以丰富绿色荧光材料的变化,这是三原色之一。提供一种由通式(G1)所表示的结构的有机
金属配合物。在该式中,R1表示1至4个碳原子的烷基基团,而R2和R3各自表示氢或具有1至4个碳原子的烷基基团。此外,R4至R7各自表示带电子吸引基团、氢或具有1至4个碳原子的烷基基团。注意,至少有一个R4至R7表示带电子吸引基团。此外,M是中心
金属,表示周期表中属于第9族或第10族元素。