The present disclosure provides a composition comprising at least one compound selected from the group consisting of Compound 1, Compound 2, and combinations thereof, as shown below, and described herein: wherein, for Compound 1 and Compound 2, independently, R.sub.1 and R.sub.2 each independently is selected from the group consisting of hydrogen, a substituted alkyl, an unsubstituted alkyl, a substituted heteroalkyl, an unsubstituted heteroalkyl, a substituted aryl, an unsubstituted aryl, a substituted heteroaryl and an unsubstituted heteroaryl; wherein, for Compound 1 and Compound 2, independently, the Component A is selected from the group consisting of Group a) through Group h): wherein Group a) through Group h) are described herein.

The present invention relates to a compound used as an EGFR kinase inhibitor and the use thereof. The compound has a structure as shown in formula I, and can be used to adjust the kinase activity or treat related diseases, especially non-small cell lung cancer.

##STR00001##

Tridentate platinum, palladium, and gold complexes of Formulas A-I and A-II and tridentate iridium and rhodium compounds of Formulas B-I, B-II, and B-III suitable for delayed fluorescent and phosphorescent or phosphorescent emitters in display and lighting applications.

##STR00001##

The present disclosure provides a boron-heterocyclic compound having a structure represented by Chemical Formula 1, in which L.sub.1 and L.sub.2 are each independently selected from a single bond, C6-C30 aryl, C6-C30 fused aryl, C4-C30 heteroaryl, or C4-C30 fused heteroaryl; and R.sub.1 and R.sub.2 are each independently selected from carbazolyl and derivative groups thereof, acridinyl and derivative groups thereof, and diarylamino and derivative groups thereof. In an embodiment, the boron-heterocyclic structure is suitable for use not only as an electron acceptor group but also as a linking group. By linking a group having a large steric hindrance to the boron atom of the boron-heterocyclic ring, the compound molecules are prevented or limited from aggregating, and thus a π-aggregation or excimer formed by direct accumulation of conjugate planes is avoided or reduced, thereby improving luminous efficiency. The present disclosure further provides a display panel and a display apparatus containing the compound. ##STR00001##

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and comprising an emission layer, wherein the interlayer further includes an electron transport region between the emission layer and the second electrode, the electron transport region includes a first compound of Formula 1 and a second compound of Formula 2, the first compound and the second compound are different from each other, and the second compound includes at least one π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group, where Formulae 1 and 2 are described herein.

A condensed cyclic compound and an organic light-emitting device, the compound being represented by Formula 1: ##STR00001##

A heterocyclic compound represented by Formula 1: ##STR00001##
wherein A.sub.1 in Formula 1 is selected from groups represented by Formulae 1-1 to 1-7, ##STR00002##
and an organic light-emitting device including the same.

The invention relates to oligomerization of olefins, such as ethylene, to higher olefins, such as a mixture of 1-hexene and 1-octene, using a catalyst system that comprises a) a source of chromium b) one or more activators and c) a phosphacycle-containing ligating compound. Additionally, the invention relates to a phosphacycle-containing ligating compound and a process for making said compound.

A dithienophosphorine compound having a cation represented by the formula

##STR00001##

(wherein Y represents an oxygen atom or a sulfur atom; R.sup.1 represents a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group; R.sup.2 represents a hydroxy group, an alkyl group, an alkoxy group, an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group; R.sup.3, R.sup.4, R.sup.5, and R.sup.6 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, or an aryl group; R.sup.7 and R.sup.8 each independently represents an arylene group or a heteroarylene group; R.sup.9 and R.sup.10 each independently represent a hydrogen atom, a halogen atom, a sulfonyl group, an alkyl group or an aryl group; each group may have one or more substituents; and R.sup.3, R.sup.4, and R.sup.7 may bind to each other and/or R.sup.5, R.sup.6, and R.sup.8 may bind to each other to form a ring together with an adjacent nitrogen atom) is an organic compound that has a maximum absorption wavelength in the NIR-II region (from 1000 to 1500 nm) although the molecular weight thereof is not extremely high, and that has excellent solubility in organic solvents and high structural selectivity.

By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are linked via a boron atom, a nitrogen atom, or the like, options of a material for an organic EL element are increased. In addition, by using the novel polycyclic aromatic compound as a material for an organic electroluminescent element, an excellent organic EL element is provided.