| 摘要 |
<p>Heteroleptic light emitting complexes having the general formula M(L 1 ) n (L 2 ) m wherein
a) L 1 has the formula E1-E2, wherein
E1 is a 6-membered heteroaryl ring, bound to the metal atom by covalent or dative bonds and containing at least one donor hetero atom, E2 is bound to the metal atom by covalent or dative bonds and is selected from the group consisting of substituted or un-substituted C 5 -C 30 aryl and substituted or un-substituted C 2 -C 30 heteroaryl groups,
b) ligand L 2 is selected from the group consisting of 1-(2,6 disubstituted phenyl)-2-phenyl-1 H- imidazole ligands or 5-(2,6 disubstituted phenyl)-1-phenyl-1 H - pyrazole ligands of formulae 1 or 2
and
c) M is a 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</p> |
