A compound having the formula Ir(L.sub.A).sub.n(L.sub.B).sub.3-n is disclosed wherein L.sub.A is an aza-DBF ligand and L.sub.B is an alkyl-substituted phenylpyridine ligand, wherein the compound has a structure according to Formula I:

##STR00001##

wherein each of A.sup.1 to A.sup.8 comprise carbon or nitrogen; wherein at least one of A.sup.1 to A.sup.8 is nitrogen; wherein ring B is bonded to ring A through a C—C bond; wherein the iridium is bonded to ring A through a Ir—C bond; wherein X is O, S, or Se; wherein R′ and R″ each independently represent mono-, di-substitution, or no substitution; wherein any adjacent substitutions in R′, R″, R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, and R.sup.6 are optionally linked together to form a ring; wherein R.sup.1, R.sup.2, R′, and R″ are each independently selected from a variety of substituents; wherein R.sup.3, R.sup.4, R.sup.5, and R.sup.6 are each independently selected from the group consisting of hydrogen, deuterium, alkyl, cycloalkyl, and combinations thereof; wherein n is an integer from 1 to 3; and wherein total number of carbons in at least one of the pairs R.sup.3 and R.sup.4, and R.sup.5 and R.sup.6 is at least four.

The present disclosure relates to a plurality of host materials comprising a first host material having a compound represented by formula 1, and a second host material having a compound represented by formula 2, and an organic electroluminescent device comprising the same. By comprising a specific combination of compounds of the present disclosure as host materials, it is possible to provide an organic electroluminescent device having long lifetime properties while having an equivalent or improved level of power efficiency compared to conventional organic electroluminescent devices.

The present invention relates to a real-time fluorescence imaging sensor for measuring glutathione in cell organelles and a method for fabricating the same. More specifically, the present invention relates to a novel compound for measuring glutathione in cell organelles, a method for preparing the novel compound, a real-time fluorescence imaging sensor for measuring glutathione in cell organelles, which comprises the novel compound, a method for fabricating the imaging sensor, and a method of measuring glutathione in cell organelles by use of the imaging sensor. When the composition comprising the compound according to the present invention is used, it can measure the antioxidant activity of the organelle mitochondria or Golgi apparatus in living cells, particularly stem cells, and can screen highly active stem cells based on the results obtained by measuring the antioxidant activity of the cell organelle.

The present disclosure relates in part to compounds capable of emitting delayed fluorescence and uses of these compounds in organic light-emitting diodes.

According to an aspect of the present disclosure, a compound having a metal planar tetradentate coordination configuration is disclosed. In the compounds, the metal M is Pt or Pd; the four coordinating atoms are Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 and are each selected from N, C, and O. The compound includes a substituent R, and atoms M, Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 are used to define a first plane that passes through the metal M and is positioned to have a minimum sum of shortest distances with Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4. At least one non-hydrogen atom in R falls within a distal circle of a cylinder extending perpendicular to the first plane, where the distal circle of the cylinder is a height h from the base circle and the height h ranges from 3.3 Å to 4.8 Å.

A compound having the formula Ir(L.sub.A).sub.n(L.sub.B).sub.3-n, having the structure

##STR00001##

of Formula I is provided. In the structure of Formula I, each of A.sup.1 through A.sup.8 is independently carbon or nitrogen; at least one of A.sup.1 through A.sup.8 is nitrogen; ring B is bonded to ring A through a C—C bond; the iridium is bonded to ring A through an Ir—C bond; X is O, S, or Se; each of R.sup.1 through R.sup.5 are independently selected from a variety of substituents, whichmay be linked for form a ring; n is an integer from 1 to 3; and at least one R.sup.2 adjacent to ring C is not hydrogen. Formulations and devices, such as OLEDs, that include the first compound are also provided.

A compound of Formula Ir(L.sub.A).sub.x(L.sub.B).sub.y(L.sub.C).sub.z is provided. Ligand L.sub.A has a structure of Formula I,

##STR00001##

ligand L.sub.B has a structure of Formula II,

##STR00002##

ligand L.sub.C is a bidentate ligand; at least one of R.sup.A and R.sup.B comprises Formula III,

##STR00003##

and L.sub.A, L.sub.B, and L.sub.C are different. In Formulae I and II, each of moiety A, B, C, and D is a ring or a fused-ring system; each of Z.sup.1 to Z.sup.8 and X.sup.1 to X.sup.5 is C or N; K is a direct bond, O, or S; L is a direct bond or a linker; and Q is Si or Ge. Formulations, OLEDs, and consumer products containing the compound are also provided.

The disclosure pertains to an organic molecule for use in optoelectronic devices. The organic molecule has a structure of Formula I:

##STR00001## wherein X is selected from the group consisting of a direct bond, NR.sup.1, O, S, SiR.sup.1R.sup.2 and CR.sup.1R.sup.2; Y is selected from the group consisting of a direct bond, NR.sup.3, O, S, SiR.sup.3R.sup.4 and CR.sup.3R.sup.4; and R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independently selected from the group consisting of: hydrogen, deuterium, N(R.sup.5).sub.2, OR.sup.5, SR.sup.5, Si(R.sup.5).sub.3, B(OR.sup.5).sub.2, OSO.sub.2R.sup.5, CF.sub.3, CN, halogen, C.sub.1-C.sub.40-alkyl, C.sub.1-C.sub.40-alkoxy, C.sub.1-C.sub.40-thioalkoxy, C.sub.2-C.sub.40-alkenyl, C.sub.2-C.sub.40-alkynyl, C.sub.6-C.sub.60-aryl, and C.sub.3-C.sub.57-heteroaryl.

The present invention relates to a series of neutral fluorescent mitochondrial markers as amide derivatives, and a preparation method and use thereof. The present invention provides for the first time that neutral dyes have excellent mitochondria targeting ability after being bonded to an amide compound. The present invention solves the problems of uncertain organelle targeting ability of the existing fluorescent dyes with a neutral structure and that the neutral dye is a commercial marker for lipid droplets in cells. In the present invention, the organelle targeting ability of a fluorescent dye is regulated by creatively modifying the structure, while the optical performance of the original dye is improved; and the biological properties of the dye are obviously improved after being bonded to an amide compound. Amide compounds are cheap and readily available, which is conducive to controlling the cost of new dyes, thus having great scientific significance and commercial value.

A compound having a Pt tetradentate structure of Formula 1,

##STR00001##

is provided. In the structure of Formula 1, rings C and D each independently represent 5- or 6-membered carbocyclic or heterocyclic ring; L.sup.1, L.sup.2, and L.sup.3 are each independently a direct bond, BR, NR, PR, O, S, Se, C═O, S═O, SO.sub.2, SiRR′, GeRR′, alkyl, cycloalkyl, or a combination thereof; the sum of n1 and n2 is 1 or 2; X is selected from NR.sup.E, O, S, and Se; X.sup.3 and X.sup.4 each independently carbon or nitrogen; and one of Q.sup.1, Q.sup.3, and Q.sup.4 is oxygen, and the remaining two of Q.sup.1, Q.sup.3, and Q.sup.4 each represents a direct bond. Formulations and devices, such as an OLEDs, that include the compound of Formula 1 are also described.