| 主权项 |
1. A heteroleptic light emitting complex having the general formula M(L1)n(L2)m wherein
a) L1 has the formula E1-E2, wherein E1 is a 6-membered heteroaryl ring bound to the metal atom by a dative bond and containing at least one donor hetero atom wherein said heteroaryl ring may be un-substituted or substituted by substituents selected from the group consisting of halogen, alkyl, alkoxy, amino, cyano, alkenyl, alkynyl, arylalkyl, aryl and heteroaryl group and/or may form an annealed ring system with other rings selected from cycloalkyl, aryl and heteroaryl rings, and E2 is bound to the metal atom by covalent or dative bonds and is selected from the group consisting of substituted or un-substituted C5-C30 aryl and substituted or un-substituted C2-C30 heteroaryl groups, which E2 group may be un-substituted or substituted by substituents selected from the group consisting of halogen, alkyl, alkoxy, amino, cyano, alkenyl, alkynyl, arylalkyl, aryl and heteroaryl groups and E1 and E2 are linked via a covalent bond, b) ligand L2 is selected from the group consisting of 1-(2,6 disubstituted phenyl)-2-phenyl-1H-imidazole ligands or 5-(2,6 disubstituted phenyl)-1-phenyl-1H-pyrazole ligands of formulae 1 or 2 wherein R1 and R2, which may be the same or different, represent a group other than H, and R3 is selected from the group consisting of H, halogen, NO2, CN, N(R4)2, B(OR4)2, COOH, C(O)R4, CO2R4, CON(R4)2, OR4, SR4, SO3H, S(═O)R4, S(═O)2R4, P(R4)2, P(═O)(R4)2, Si(R4)3, alkyl, cycloalkyl, haloalkyl, alkoxy, alkenyl, alkynyl, aryl, alkylaryl, heteroaryl, substituted heteroaryl and heterocyclic groups, with the proviso that R3 is not aryl if ligand L2 is represented by formula 1, R4 which may be the same or different, are selected from the group consisting of H, alkyl, alkenyl, alkynyl, aryl, substituted aryl, alkylaryl, halogen, heteroaryl, substituted heteroaryl and heterocyclic groups, R and R′, independently of one another, are selected from the group consisting of H, halogen, NO2, CN, N(R5)2, B(OR5)2, COOH, C(O)R5, CO2R5, CON(R5)2, OR5, SR5, SO3H, S(═O)R5, S(═O)2R5, P(R5)2, P(═O)(R5)2, Si(R5)3, alkyl, alkenyl, alkynyl, aryl, substituted aryl, alkylaryl, heteroaryl, substituted heteroaryl and heterocyclic groups, R5 which may be the same or different, are selected from the group consisting of H, alkyl, alkenyl, alkynyl, aryl, substituted aryl, alkylaryl, halogen, heteroaryl, substituted heteroaryl and heterocyclic groups, a is an integer of from 0 to 3 and b is an integer of from 0 to 2, and c is an integer of from 0 to 3, c) M is a non-radioactive transition metal with an atomic number of at least 40 and the sum of m and n is equal to half of the bond valency of metal M. |
