Abstract: A process for forming a facial tris-cyclometallated iridium or rhodium complex isomer comprises heating an original solid composition containing meridional isomer of the metal complex at a temperature and for a time sufficient to form a product containing the facial isomer in an increased ratio to meridional isomer compared to the original composition.

Abstract: An OLED device comprises a cathode, an anode, and located therebetween a light emitting layer containing a compound represented by formula (I): Am-M-Bn??(I) wherein m+n=2 or 3 and neither m nor n is 0; M is Ir, Pt, Os, Ru, Rh, or Pd; Am includes at least one ligand A having a triplet energy of at least 2.9 eV as measured in a homoleptic complex of M and A; and B is represented by the formula (II): wherein Q represents an atomic group forming a nitrogen-containing heterocyclic ring; and R5, R6, R7, R8 and R5? independently represent a hydrogen atom or a substituent.

Abstract: Disclosed is an electroluminescent device comprising a light-emitting layer containing a light emitting phosphorescent material that contains an organometallic complex comprising a metal selected from the group consisting of Mo, W, Re, Ru, and Os that is coordinated to a neutral or negatively-charged ligand group through the ? electrons of the ligand with a hapticity greater than 2. The device provides useful light emissions.

Abstract: An OLED device comprises an anode, a cathode and therebetween a light emitting layer containing a compound represented by Formula I below: wherein: each A is independently selected from N and P; each E is independently selected from N, P, and As; each Z is a radical independently selected from each R is an independently selected substituent; and each R? is independently selected from H and a substituent; provided that two substituent groups can join to form a ring.

Abstract: A process for forming a diazo compound comprises reacting an organic compound bearing an acidic hydrogen with an aryl-diazonium salt in the presence of an inorganic base and a non-halogenated solvent. The process is simpler and more environmentally friendly than known processes.

Abstract: A process for synthesizing a single isomer of a naphthacene compound comprises the steps of: (a) reacting a symmetrically substituted 1,1-diarylpropargyl alcohol compound with a reagent capable of forming a leaving group to form a reaction mixture containing a intermediate; and then (b) heating the intermediate in the presence of a solvent and in the absence of any oxidizing agent to form a single naphthacene compound.

Abstract: An OLED device comprises an anode and a cathode and having therebetween a light emitting layer containing an emissive material, wherein a layer between the anode and cathode contains a phosphineoxide compound bearing two or more tri(hetero)arylphosphineoxide groups, provided these groups are selected to give a compound with a Et?2.65 eV.

Abstract: A process for forming a facial tris-cyclometallated rhodium or iridium complex isomer from a meridional isomer comprises subjecting the meridional isomer to an isomerization reaction in the presence of an acid, an organic solvent, and silica particles.

Abstract: A process for forming a tris-cyclometallated complex comprises the step of reacting; a) an M(I) complex, wherein M represents Rh or Ir, and said complex comprises at least two ligands and contains at least two alkenyl groups pi-bonded to M, with b) a heterocyclic compound capable of forming a organometallic cyclometallated complex.

Abstract: Disclosed is an electroluminescent device comprising a cathode and an anode and, located therebetween, a light-emitting layer (LEL) comprising a phosphorescent guest material, a hole- and electron-transporting host material, and an efficiency-enhancing material having an ionization potential lower than that of the host material and a triplet energy level that is lower than that of the phosphorescent guest material by no more than 0.2 eV. Such a device provides useful light emission features.

Abstract: Disclosed is an article comprising a polymer layer containing a plurality of integral polymer conduit channels that contain at least two layers with at least one comprising a conductive material and the other serving a function beyond protection.

Abstract: A process for improving the stability to photo-oxidation of a polycyclic aromatic compound having at least two polymorphic forms comprises treating a first polymorph with one or more solvents to obtain the more stable second polymorph and then separating the second polymorph from the solvent.

Abstract: An OLED device comprises a light-emitting layer containing a hydrocarbon host material and a light-emitting material of Formula (1): wherein: each Ar represents an independently selected aromatic group; each R1 represents an independently selected alkyl group or aromatic group; n is 1 or 2; Za represents the atoms necessary to form an aromatic ring group; R represents hydrogen or a substituent group; Z represents hydrogen or a substituent group; and L1 and L2 represent independently selected substituent groups; provided that any two adjacent substituents of any of the above groups may join to form a ring.

Abstract: The invention provides a color photographic element comprising at least one light-sensitive silver halide emulsion layer or a non silver-containing light-insensitive layer, in which at least one of these layers contains a colorless heterocyclic compound having either one or two hetero atoms in the ring or ring system, being other than an imidazole compound, that undergoes less than 10% chemical or redox reaction directly with oxidized developer and which has a partition coefficient to enable the photographic speed of the element to be increased by at least 0.03 stop without increasing granularity, compared to the same element without the compound. The heterocyclic compounds increase speed without a concomitant increase in size of the light-sensitive silver halide grains.

Abstract: Disclosed is an OLED device comprising a light-emitting layer containing a light emitting bis(azinyl)methene boron complex compound comprising a complex system of at least five fused rings and bearing, on at least one ring carbon or nitrogen, a substituent sufficient to provide a wavelength of maximum emission of less than 520 nm as measured at a concentration of <10?3M in ethyl acetate solvent.

Abstract: An electroluminescent device comprises a light emitting layer including an anthracene material bearing at least one aryl ring in the 2-position and having a hydrogen or an alkyl group in the 6-position and having up to 12 aromatic carbocyclic rings including at least one naphthalene group in the 9-position of the anthracene group and an aryl group in the 10-position, the anthracene material including among the rings only carbocyclic rings.

Abstract: A process for synthesizing a naphthacene compound comprises the steps of: (a) reacting a propargyl alcohol compound with a reagent capable of forming a leaving group to form a reaction mixture containing an intermediate; and then (b) heating the intermediate in the presence of a solvent and in the absence of any oxidizing agent and in the absence of any base, to form the naphthacene compound.

Abstract: A process for forming the facial isomer of an aluminum trisquinoline complex comprises heating the solid aluminum trisquinoline complex material at a temperature at least 50° C. below the melting point temperature of the solid for a time sufficient to convert the aluminum trisquinoline complex to at least 99 mol % of one polymorph of the facial-isomer that fluoresces with a maximum intensity below 510 nm.

Abstract: An electroluminescent device comprises a light-emitting layer containing a host and a light-emitting material wherein the light-emitting material comprises a boron complex containing boron complexed by two ring nitrogens of a deprotonated bis(aromatic)amine or bis(aromatic)methene ligand wherein the boron complex contains a tertiary amine substituent group. The invention provides a material for a light-emitting layer of an EL device that exhibits improved luminance efficiency.

Abstract: A method for the preparation of N-pyrazolylamidoximes of the general formula I R1 and R2 independently represent an alkyl, aryl, or heteroaryl group, comprises reacting a 5-(?-ketoalkyl)-3-substituted-1,2,4-oxadiazoles of the general formula II with hydrazine.