The present invention relates to silole and germole fused ring photochromic compounds represented, with some embodiments, by the following Formula (Ia), (Ia) With reference to Formula (Ia): M includes Si or Ge; Ring A and Ring B each independently include aryl or heteroaryl; and the photochromic compound is a thermally reversible photochromic compound. The present invention also relates to photochromic compositions and photochromic articles, such as photochromic ophthalmic articles that include one or more photochromic compounds represented, with some embodiments, by Formula (Ia). ##STR00001##

The present invention relates to certain fluorenes, to the use of the compounds in an electronic device, and to an electronic device comprising at least one of these compounds. The present invention furthermore relates to a process for the preparation of the compounds and to a formulation and composition comprising one or more of the compounds.

An organic electroluminescence device of the embodiments includes oppositely disposed first electrode and second electrode, and a plurality of organic layers disposed between the first electrode and the second electrode, wherein at least one among the organic layers includes a fused polycyclic compound represented by Formula 1 below, thereby showing improved emission efficiency and long life: Formula 1 ##STR00001##

The present disclosure provides four monocarborane cluster-containing platinum complexes and a preparation method and an OLED application. The monocarborane cluster-containing platinum complex has a general structural formula selected from the group consisting of the following general structural formulas: ##STR00001##
wherein —R.sub.1 is selected from the group consisting of C.sub.4-12 linear alkyl; each R and R.sub.5 are independently any one selected from the group consisting of —CH.sub.3, H, tert-butyl and aryl; aryl is any one selected from the group consisting of phenyl, carbazole ##STR00002##
and aniline ##STR00003##
wherein R.sub.2 is any one selected from the group consisting of methyl, tert-butyl and phenyl; R.sub.3 is any one selected from the group consisting of methyl, tert-butyl and phenyl; n is 1 to 3; X is C element; when the ligand of the general structural formula is triazole, X is N element; —CB.sub.11H.sub.11 is monocarborane with a structure of ##STR00004##

The objective of the invention is to provide a polycyclic aromatic compound in which solubility to a solvent, film formability, wet coatability, thermal stability, and in-plane orientation are improved. This objective is achieved by alight emission layer-forming composition comprising: as a first component, at least one type of dopant material selected from the group consisting of polycyclic aromatic compounds represented by general formula (A) and polycyclic aromatic oligomer compounds including a plurality of structures represented by general formula (A); as a second component, a specific low-molecular-weight host material; and, as a third component, at least one type of organic solvent. In formula (A), ring A, ring B, and ring C each independently represent an aryl ring or a hetero aryl ring, Y.sup.1 is B, and X.sup.1 and X.sup.2 each independently represent O or N—R wherein at least one of X.sup.1 and X.sup.2 is N—R. ##STR00001##

A compound having a formula M(L.sub.A).sub.x(L.sub.B).sub.y(L.sub.C).sub.z is provided. In the compound of M(L.sub.A).sub.x(L.sub.B).sub.y(L.sub.C).sub.z, ligand L.sub.A is ##STR00001##
ligand L.sub.B is ##STR00002##
and ligand L.sub.C is ##STR00003##
In addition, M is a metal having an atomic mass greater than 40, x is 1, 2, or 3, and y and z are independently 0, 1, or 2. In the compound, Z.sup.5 is carbon or nitrogen; one of Z.sup.1 to Z.sup.4 is nitrogen and three of Z.sup.1 to Z.sup.4 are carbon substituted by R.sup.B, and rings C and D are each independently a 5 or 6-membered carbocyclic or heterocyclic ring. Each R.sup.A, R.sup.B, R.sup.C, and R.sup.D is independently selected from a group of substituents, where at least one R.sup.B is heteroaryl, which can be further substituted, and any adjacent substitutents are optionally joined or fused into a ring. Formulations and devices, such as OLEDs, that include the first compound are also provided.

A compound comprising a first ligand L.sub.A of Formula I,

##STR00001##

where moiety A has a structure of Formula II,

##STR00002##

or Formula III,

##STR00003##

and G comprises a structure of Formula IV,

##STR00004##

is provided. In L.sub.A, moiety B is one or more rings; ring C is a 5- or 6-membered ring; each of Z.sup.1, Z.sup.2, Z.sup.3, and X.sup.1 to X.sup.8 is C or N; K is a direct bond or selected from the group consisting of O, S, N(R.sup.α), P(R.sup.α), B(R.sup.α), C(R.sup.α)(R.sup.β), and Si(R.sup.α)(R.sup.β); each R.sup.α, R.sup.β, R.sup.A, R.sup.B, R.sup.C, and R.sup.D is hydrogen or a General Substituent; L.sub.A is coordinated to a metal M selected from the group consisting of Ir, Rh, Re, Ru, Os, Pt, Pd, Ag, Au, and Cu; and any two substituents may be joined or fused to form a ring. Formulations, OLEDs, and consumer products containing the compound are also provided.

There are provided a fluorescent compound of the following formula or a salt thereof and a labeled biological substance.

##STR00001## Y represents —NR.sup.10R.sup.11 or —OR.sup.12, and R.sup.1 to R.sup.12, R.sup.21 to R.sup.23, and Z represent specific groups and satisfy the following regulations. At least one of R.sup.21 or R.sup.22 is an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group. In a case of R.sup.21=an aryl group and R.sup.22=an alkyl group or an aryl group, at least R.sup.7 and R.sup.8, or R.sup.10 and R.sup.11 are bonded to each other to form a 4-membered ring. A compound of Formula (I) or (II) or a salt thereof satisfies condition α, and a compound of Formula (III) or (IV) or a salt thereof satisfies condition β. (Condition α) In a case where Z is an aryl group, the aryl group has a specific structure. (Condition β) At least R.sup.7 and R.sup.8, or R.sup.10 and R.sup.11 are bonded to each other to form a 4-membered ring.

A compound of Formula I,

##STR00001##

is provided where moieties B and D are monocyclic or polycyclic rings; M is Pt or Pd; each of X.sup.1 to X.sup.7, Z.sup.1, and Z.sup.2 is C or N; Y.sup.1 and Y.sup.2 are each independently linking groups; L.sub.1 and L.sub.2 are each independently absent a bond, a direct bond, or a linking group; K is selected from the group consisting of a direct bond, O, S, N(R.sup.α), P(R.sup.α), B(R.sup.α), C(R.sup.α)(R.sup.β), and Si(R.sup.α)(R.sup.β). Formulations, OLEDs, and consumer products containing the compound are also provided.

A compound comprising a ligand L.sub.A comprising a moiety L having a structure of Formula I

##STR00001##

is provided. In Formula I, L.sub.A coordinated to a metal M; A.sup.1 is selected from B, N, P, P═O, P═S, Al, Ga, SiR″, GeR″, and SnR″; where rings A, B, and C are 5- or 6-membered rings; Y.sup.1, Y.sup.2, and Y.sup.3 are selected from direct bonds, the metal M, and a variety of linkers; a+b+c=2 or 3; and one of a number of specific conditions is met. OLED devices, consumer products, and formulations including the compound are also provided.