Abstract: Novel ruthenium, rhodium, palladium, osmium, iridium or platinum complexes of dibenzothiophen ligands are electroluminescent compounds.

Abstract: Electroluminescent devices have an electroluminescent layer incorporating iridium complexes with 2-benzo[b]thiophenyl and benzimidazole ligands such as bis[thiophen-2-yl-pyridine-C2,N?]-2-(2-pyridyl)-benzimidazole iridium

Abstract: An electroluminescent composition is provided comprising (a) lithium quinolate or substituted quinolate exhibiting a blue electroluminescence and being the result of reaction between a lithium alkyl or alkoxide with 8-hydroxy quinoline or a substituted derivative thereof in a solvent which comprises acetonitrile and (b) a dopant. Also provided is an electroluminescent device which comprises sequentially (i) a first electrode (ii) a layer of an electroluminescent material which comprises lithium quinolate or substituted quinolate doped with a dopant and (iii) a second electrode.

Abstract: An electroluminescent material is a metal complex, preferably aluminium, of a substituted pyrazol-5-one.

Abstract: Novel boron complexes are blue emissive electroluminescent compounds.

Abstract: An electroluminescent compound is an organic diiridium acatylacetonate complex.

Abstract: An improved electroluminescent device has a layer of a first electroluminescent metal complex or organo metallic complex and a layer of a second metal complex or organo metallic complex in which the band gap of the metal in the second electroluminescent metal complex or organo metallic complex is larger than the band gap of the metal in the first electroluminescent metal complex or organo metallic complex.

Abstract: An electroluminescent compound is a organometallic complex in which the metal is titanium, zirconium, hafnium, vanadium, niobium or tantulum.

Abstract: An electroluminescent material is a metal complex of 1-phenyl-3-methyl-4-trimethylacetyl-pyrazol-5-one of formula (I). An electroluminescent device comprising the compound of formula (I) in the luminescent layer is also part of the invention.

Abstract: An electroluminescent material is a metal complex, preferably aluminium, of a substituted pyrazol-5-one.

Abstract: A method of production of a homopolymer or copolymer or homo-oligomer or co-oligomer product characterised in that the product is obtained by condensation reaction of a diaminoanthracene, substituted or not, optionally with a diiminoanthracene substituted or not in the absence of anthraquinone substituted or not.

Abstract: There are disclosed polymeric or oligomeric product obtainable from the reaction of an anthraquinone with an aromatic diamine, characterised in that the anthraquinone is substituted or is not substituted and in that the diamine is a diamino anthracene which is substituted or is not substituted. The anthraquinone may be of the general formula (I): where, R may be the same as or different to R′, and may be a hydrogen atom (when R=R′=H, the compound is anthraquinone), or CH3, CH3CH2—, —OCH3, —OCH2CH3, —CH2OCH3, —CH2OCH2CH2OCH3, methoxyethoxyethoxymethyl, aryloxymethyl, phenyl, Cl, Br, CN or NO2, —CH2COOR or CH2NHCOR″ (where R″ is C1-C6 alkyl or a phenyl or biphenyl group).

Abstract: A method of production of a homopolymer or copolymer or homo-oligomer or co-oligomer product characterised in that the product is obtained by condensation reaction of a diaminoanthracene, substituted or not, optionally with a diiminoanthracene substituted or not in the absence of anthraquinone substituted or not.