Patent ID: 6869694
Filing Date: 2005-03-22
Classification: C07F,C09K,H01L,Y10S

Abstract:
1. A metal coordination compound represented by formula (1) below: wherein M is a metal atom of Ir, Pt, Rh or Pd; L and L′ are mutually different bidentate ligands; m is 1, 2 or 3 and n is 0, 1 or 2 with the proviso that m+n is 2 or 3; a partial structure MLm is represented by formula (2) shown below and a partial structure ML′ n is represented by formula (3) or (4) shown below: wherein CyN1 and CyN2 are each cyclic group capable of having a substituent, including a nitrogen atom and bonded to the metal atom M via the nitrogen atom; CyC1 and CyC2 are each cyclic group capable of having a substituent, including a carbon atom and bonded to the metal atom M via the carbon atom with the proviso that the cyclic group CyN1 and the cyclic group CyC1 are bonded to each other via a covalent bond and the cyclic group CyN2 and the cyclic group CyC2 are bonded to each other via covalent bond; the optional substituent of the cyclic groups is selected from a halogen atom, cyano group, a nitro group, a trifluoromethyl group, a trialkylsilyl group of which the alkyl groups are independently a linear or branched alkyl group having 1 to 8 carbon atoms, a linear or branched alkyl group having 2 to 20 carbon atoms of which the alkyl group can include one or non-neighboring two or more methylene groups that can be replaced with —O—,—S—, —CO—, —CO—O—, —O—CO—, —CH═CH— or —C≡C—, and the alkyl group can include a hydrogen atom that can be optionally replaced with a fluorine atom, or an aromatic group capable of having a substituent (that is a halogen atom, a cyano atom, a nitro atom, a linear or branched alkyl group having 1 to 20 carbon atoms of which the alkyl group can include one or non-neighboring two or more methylene groups that can be replaced with —O—, —S—, —CO—, —CO—O—, —O—CO—, —CH═CH— or —C≡C—, and the alkyl group can include a hydrogen atom that can be optionally replaced with a fluorine atom); E and G are independently a linear or branched alkyl group having 1 to 20 carbon atoms of which the alkyl group can include a hydrogen atom that can be optionally replaced with a fluorine atom, or an aromatic group capable of having a substituent (that is a halogen atom, a cyano atom, a nitro atom, a trialkylsilyl group of which the alkyl groups are independently a linear or branched alkyl group having 1-8 carbon atoms, a linear or branched alkyl group having 1 to 20 carbon atoms of which the alkyl group can include one or non-neighboring two or more methylene groups that can be replaced with —O—, —S—, —CO—, —CO—O—, —O—CO—, —CH═CH— or —C≡C—, and the alkyl group can include a hydrogen atom that can be optionally replaced with a fluorine atom; and at least one of the cyclic groups CyC1 and CyC2 includes a benzofuran structure capable of having a substituent represented by the following formula (5):  wherein the benzofuran structure of the formula (5) is bonded to CyN1 or CyN2 via a single bond at any one of 2- to 7-positions and bonded to the metal atom M via a single bond at any one of 2- to 7-positions; the optional substituent of the benzofuran structure of the formula (5) is selected from a halogen atom, cyano group, a nitro group, a trifluoromethyl group, a trialkylsilyl group of which the alkyl groups are independently a linear or branched alkyl group having 1 to 8 carbon atoms, a linear or branched alkyl group having 2 to 20 carbon atoms of which the alkyl group can include one or non-neighboring two or more methylene groups that can be replaced with —O—,—S—, —CO—, —CO—O—, —O—CO—, —CH═CH— or —C≡C—, and the alkyl group can include a hydrogen atom that can be optionally replaced with a fluorine atom, or an aromatic group capable of having a substituent (that is a halogen atom, a cyano atom, a nitro atom, a linear or branched alkyl group having 1 to 20 carbon atoms of which the alkyl group can include one or non-neighboring two or more methylene groups that can be replaced with —O—,—S—, —CO—, —CO—O—, —O—CO—, —CH═CH— or —C≡C—, and the alkyl group can include a hydrogen atom that can be optionally replaced with a fluorine atom) with the proviso that an adjacent pair of substituents located at 4- to 7-positions of the benzofuran structure of the formula (5) can be bonded to form a cyclic structure.