Abstract: Disclosed is a compound including a ligand LA of Formula I where each of moiety A and moiety B is independently a monocyclic or polycyclic ring structure including 5-membered and/or 6-membered carbocyclic or heterocyclic rings; where moiety B includes a structure of Formula II These compounds are useful as a component in the emissive layer of OLEDs.

Abstract: Provided are organometallic compounds comprising a first ligand LA which is based on a structure of fused five and six-membered rings according to Formula I as described herein and their various uses including as emitters in devices. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.

Abstract: A compound having a structure of Formula I, is provided. In Formula I, each of moieties B, C, and D is a ring or multicyclic ring system; each of X1, X2, X3, X4, X5, Y1, Z1, Z2, Z3, Z4, and Z5 is C or N; each of K1, K2, and K3 is a direct bond, O, or S; L1 and L2 are independently direct bonds or bivalent linking groups; each R, R?, RA, RB, RC, and RD is independently hydrogen or a substituent; any two substituents may be joined or fused together to form a ring; and at least one pair of RB, RC, or RD are joined to form a 5-membered heterocyclic ring. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A heteroleptic compound of formula Ir(LA)m(LB)n, where LA has a structure of Formula I, and LB has Formula II, is provided. In Formulae I and II, moieties A and D are independently a rings or polycyclic ring systems, one of moiety A and moiety D is coordinated to Ir by a 5-membered ring, and the other is coordinated to Ir by a 6-membered ring; each of X, X1 to X12 is C or N; Y is a linking atom; each RA, RB, RC, RD, and RE is hydrogen or a general substituent; and at least one RD or RE substituent comprises an electron-withdrawing group, or an aryl or heteroaryl substituted with an electron-withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In Formula I, moiety A is a heterocyclic fused ring system comprising a 5-membered ring fused to a 6-membered ring; moiety B is an aromatic ring or fused ring system; each RA and RB is independently a hydrogen or a General Substituent; K is a direct bond, O, or S; at least one of RA and RB comprises a substituent R comprising a silyl group or a germyl group; ligand LA is coordinated to a metal M, which has an atomic mass of at least 40; and metal M may be coordinated to other ligands Formulations, OLEDs, and consumer products containing the same are also provided.

Abstract: A compound having the structure of Formula I, is provided. In Formula I, M is Pt or Pd; moieties A, B, C, and D are each monocyclic or multicyclic ring system; K1, K2, K3, and K4 are selected from a direct bond, O, S, and Se; when present, each of L1, L2, L3, and L4 is a direct bond or a linker; at least three of L1, L2, L3, and L4 are present; and the compound comprises at least one structure Formulations, OLEDs and consumer products containing the compound are also provided.

Abstract: Provided is a compound comprising a first ligand LA of

Abstract: Disclosed are support-activators and catalyst compositions comprising the support-activators for polymerizing olefins in which the support-activator includes clay heteroadduct, prepare from a colloidal phyllosilicate such as a colloidal smectite clay, which is chemically-modified with a heterocoagulation agent. By limiting the amount of heterocoagulation reagent relative to the colloidal smectite clay as described herein, the smectite heteroadduct support-activator is a porous and amorphous solid which can be readily isolated from the resulting slurry by a conventional filtration process, and which can activate metallocenes and related catalysts toward olefin polymerization. Related compositions and processes are disclosed.

Abstract: Provided are compounds comprising ligands LA that are ligands of Pt and Ir complexes for OLED applications. Also provided are formulations comprising these compounds comprising ligands LA that are ligands of Pt and Ir complexes for OLED applications. Further provided are OLEDs and related consumer products that utilize these compounds comprising ligands LA that are ligands of Pt and Ir complexes for OLED applications.

Abstract: Heteroleptic compounds having a structure of Ir(LA)p(LB)q(LC)r, where LB and LC are different bidentate ligands, p is 1 or 2, q is 1 or 2, r is 0, 1, or 2, and ligand LA has a structure of Formula I, In Formula I, moiety B is a monocyclic or polycyclic fused ring system; each of X1 to X6 is C or N; each RA, RB, and RC is independently a hydrogen or a general substituent; at least one RB comprises a partially or fully deuterated alkyl or cycloalkyl group; if moiety B is phenyl, at least two adjacent RC substituents are fused to form a ring, with the proviso that at least one LB or LC is present and is not a phenylpyridine-based ligand. Formulations, OLEDs, and consumer products containing the same are also disclosed.

Abstract: A compound including a first ligand LA of Formula I, is provided. In Formula I, each of moiety A and moiety B independently represents monocyclic or polycyclic rings; one of Z1 and Z2 is C and the other is N; K is a direct bond, O, or S; at least one RA or RB has a structure of Formula II, where at least two of X1 to X4 are C; L is a direct bond or an organic linker; each R, R?, R?, RA, RB, and RC is a hydrogen or a General Substituent; and LA is coordinated to a metal M. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: Provided are compounds of formula Ir(LA)x(LB)y(LC)z wherein the LA ligand has the Formula I that are useful as phosphorescent emitters in OLEDs. Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: A compound comprising a ligand of LA of Formula I, is provided with variables as defined herein. Formulations, OLEDs, and consumer products including the compound are also disclosed.

Abstract: Provided are compounds comprising a first ligand LA; wherein LA comprises a 5-membered heterocycle joined to a metal M by a M-C or M-N bond; wherein the 5-membered heterocycle comprises at least one boron atom; wherein M is selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au; and wherein LA does not comprise a structure of Formula I. wherein X is B or N; with the proviso that the 5-membered heterocycle does not comprise a B—B bond; and with the proviso that if M is Pd or Pt and the 5-membered heterocycle is fused to a benzene ring, the benzene ring is not part of a 6-membered chelate ring comprising M. Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: Provided are compounds of formula Ir(LA)m(LB)n, where m and n are each independently 1 or 2; and m+n=3; where LA has a structure of Formula I and LB has a structure of Formula II that are useful as emitters in OLEDs. Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: Provided is an organometallic compound including a first ligand LA selected from In ligand LA, each of Y1 to Y10 is carbon or nitrogen; moiety B is a monocyclic or polycyclic fused ring structure including 5-membered and/or 6-membered rings; any two RA and RB can be fused or joined to form a ring; X is selected from O, S, Se, or NR; each RA and RB is independently hydrogen or a substituent selected from the general substituent defined herein; at least one R, RA, or RB is deuterium or a linking group between LA and another ligand that includes a deuterium substituted aromatic ring; and LA is coordinated to a metal M, selected from Os, Pd, Pt, Ir, Cu, Ag, or Au; and the compound is capable of emitting light with a peak maximum wavelength (?max)?700 nm at room temperature.

Abstract: Provided are organometallic compounds comprising a first ligand LA comprising a multicyclic fused ring system wherein ligand LA is coordinated to a metal M; and wherein M is selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au. Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

Abstract: Provided is a compound including a first ligand LA of Formula I, In Formula I, moiety A is a monocyclic ring or a multicyclic fused ring system; one of X1, X2, and X3 is C and is connected to X4; one of X1, X2, and X3 is N and is coordinated to a metal M; and the remaining one of X1, X2, and X3 is CR or N; X4 is C or N; Y is a divalent linking group; each R, R?, RA, and RB is independently hydrogen or a General Substituent; each of K1 and K2 is independently direct bond, O, or S; and metal M is selected from the group consisting of Os, Ir, Pd, Pt, Cu, Ag, and Au. Formulations, OLEDs, and consumer products including the same are also provided.

Abstract: A compound including a first ligand LA of Formula I, is disclosed. In Formula I, ring B is a 5- or 6-membered ring; X1, X2, and X3 are each CRA or N; R is a 5- or 6-membered carbocyclic or heterocyclic ring, which can be further fused or substituted; and (1) when ring B is an unfused 6-membered ring, X1 and X2 are N, and X3 is C; and (2) when ring B is a fused 6-membered ring, ring B has the structure of Formula II, In this structure, the wavy line indicates the point of connection to ring A; Q1 to Q6 are each C or N; and, when proviso (2) applies, (I) at least one of X1, X2, and X3 is N; or (II) R is two or more fused or unfused 5- or 6-membered carbocyclic or heterocyclic rings, or (III) at least ring A or R is substituted with a partially or fully deuterated alkyl or partially or fully deuterated cycloalkyl group.

Abstract: Provided are novel silyl-containing acetylacetonate derivatives compounds. Also provided are formulations comprising these silyl-containing acetylacetonate derivatives compounds. Further provided are OLEDs and related consumer products that utilize these silyl-containing acetylacetonate derivatives compounds.