Organometallic complex including pyrazine derivative
View Patent ↗An organometallic complex is provided by which favorable red-color light emission can be obtained. Further, an organometallic complex having a peak of light emission at about 620 nm is provided because the wavelength of light which is perceived as excellent red-color light is about 620 nm. Furthermore, an organometallic complex is provided by which red-color light emission with high luminous efficiency (cd/A) can be obtained. An organometallic complex represented by the following general formula (G2) and a light-emitting element, a light-emitting device, and an electronic device including the organometallic complex represented by the following general formula (G2) are provided.
1. An organometallic complex represented by a formula (G2),
wherein R 1 , R 2 , R 3 , R 4 and R 5 each represent hydrogen or a cyano group, and at least one of R 1 , R 2 , R 3 , R 4 and R 5 is a cyano group;
wherein L represents a monoanionic ligand selected from the group consisting of a monoanionic bidentate chelate ligand having a β-diketone structure, a monoanionic bidentate chelate ligand having a carboxyl group, a monoanionic bidentate chelate ligand having a phenolic hydroxyl group, and a monoanionic bidentate chelate ligand in which two ligand elements are both nitrogen;
wherein M represents iridium; and
wherein n is 2.
2. The organometallic complex according to claim 1 , wherein the monoanionic ligand is a monoanionic ligand represented by any of structural formulae (L1), (L2), (L3), (L4), (L5), (L6), (L7) and (L8)
3. An organometallic complex represented by a formula (G2),
wherein R 1 , R 2 , R 3 , R 4 and R 5 each represent hydrogen or a cyano group, and any one of R 1 , R 2 , R 3 , R 4 and R 5 is a cyano group;
wherein L represents a monoanionic ligand selected from the group consisting of a monoanionic bidentate chelate ligand having a β-diketone structure, a monoanionic bidentate chelate ligand having a carboxyl group, a monoanionic bidentate chelate ligand having a phenolic hydroxyl group, and a monoanionic bidentate chelate ligand in which two ligand elements are both nitrogen;
wherein M represents iridium; and
wherein n is 2.
4. The organometallic complex according to claim 3 , wherein the monoanionic ligand is a monoanionic ligand represented by any of structural formulae (L1), (L2), (L3), (L4), (L5), (L6), (L7) and (L8)
5. An organometallic complex represented by a formula (1)
6. An organometallic complex represented by a formula (2)
7. An organometallic complex represented by a formula (3)