(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.

Blue phosphorescent platinum(ii) tetracarbene complexes with bis(triazoline-5-ylidene) ligands.

Platinum(ii) tetracarbene complexes with chelating bis(imidazoline-2-ylidene) ligands have recently shown to be an interesting class of phosphorescent emitters, although they exhibit emission wavelengths in the near-UV region with only moderate quantum yields. By changing the bis(imidazoline-2-ylidene) ligands to bis(triazoline-5-ylidene) ligands we have successfully shifted the emission wavelengths to the visible region of the spectrum. We herein report the synthesis of new bis- and tetracarbene complexes with bis(triazoline-5-ylidene) ligands, their photophysical properties and a solid state structure of a representative member of this new class of compounds.

Near-UV phosphorescent emitters: N-heterocyclic platinum(ii) tetracarbene complexes.

Although examples of nickel(ii), palladium(ii) and platinum(ii) N-heterocyclic tetracarbene complexes are known in the literature, particularly platinum(ii) tetracarbene complexes are rare. We developed a new synthetic route via biscarbene acetate complexes, which make homoleptic as well as heteroleptic platinum(ii) tetracarbene complexes accessible. The reported photoluminescence data show that these complexes have good quantum yields and photostability and are a promising class of emitters for PhOLEDs.

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.