Light-emitting material comprising orthometalated iridium complex, light-emitting device, high efficiency red light-emitting device, and novel iridium complex

1. A synthesis method of a compound represented by following formula (24), the method comprising:

reacting at least one of a ligand and a dissociation product thereof with an iridium compound at a room temperature or at an elevated temperatures in the presence or absence of a solvent or in the presence or absence of a base:

wherein R 11 and R 12 each represents an alkyl group, an aryl group, a heteroaryl group, an alkoxy group, a halogen atom, a cyano group, or a cyclic structure obtained by the connection of one of the plurality of R 11 s to another of the plurality of R 11 s, or one of the plurality of R 12 s to another of the plurality of R 12 s, or one of the plurality of R 11 s, or one of the plurality of R 12 s; m 1 represents an integer of from 0 to 4; m 2 represents an integer of from 0 to 6; Z 2 represents an atomic group which forms an aryl ring having 6 to 30 carbon atoms or a heteroaryl ring having from 2 to 30 carbon atoms and comprising a nitrogen atom, an oxygen atom, or a sulfur atom; Z 3 represents an atomic group which forms a nitrogen-containing heteroaryl ring having 2 to 30 carbon atoms; and n 1 represents an integer of from 1 or 2.

2. The synthesis method according to claim 1 , which uses a mixed solvent of 2-methoxyethanol and water as the solvent.

3. The synthesis method according to claim 1 , wherein the reaction is conducted in a stream of nitrogen.

4. The synthesis method according to claim 1 , further comprising:

processing with an aqueous solution of hydrochloric acid.

5. The synthesis method according to claim 1 , further comprising:

purifying through a silica gel column chromatography.

6. The synthesis method according to claim 1 , which uses sodium methoxide as the base.