Yvonne Unger

Blue phosphorescent emitters: new N-heterocyclic platinum(II) tetracarbene complexes

Photoluminescence measurements show that platinum(II) tetracarbene complexes, which could be obtained via different synthetic routes, are interesting lead structures for the development of blue emitters for PhOLEDs with good quantum yields and high photostability.

(Acetylacetonato-κ2O,O')[1-(4-bromophenyl-κC2)-3-methylimidazol-2-ylidene-κC2]platinum(II).

The title platinum(II) complex, [Pt(C(10)H(8)BrN(2))(C(5)H(7)O(2))], has a bidentate cyclometallated phenylimidazolylidene ligand and an acetylacetonate spectator ligand, which form a distorted square-planar coordination environment around the Pt(II) centre. In the solid state, the molecules are oriented in a parallel fashion by intermolecular hydrogen bonding and π-π and C-H···π interactions, while close Pt···Pt contacts are not observed. The structure is only the second example for this new class of compounds.