A composition of matter that includes a novel combination of host compounds containing indol-fused hosts and emissive dopants containing benzofuran or azabenzofuran ligand is disclosed,

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

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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.

Provided are an organometallic compound represented by Formula 1, an organic light-emitting device including the organometallic compound, and a diagnostic composition including the organometallic compound:

M.sub.1(L.sub.11).sub.n11(L.sub.12).sub.n12   Formula 1

wherein L.sub.11 in Formula 1 is a ligand represented by Formula 1-1:

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wherein, in Formula 1-1, Ar.sub.1 is a phenyl group substituted with at least one of E.sub.1 and Ar.sub.2 is a phenyl group substituted with at least one E.sub.2, and the other substituents are described in the detailed description of the present specification.

Provided are organometallic compounds including a ligand L.sub.A of

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Also provided are formulations including these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Disclosed are a method for synthesizing a thieno[3,2-b]pyridine-5(4H)-one derivative by using a gold catalyst and a use of the derivative compound, wherein the novel thieno[3,2-b]pyridine-5(4H)-one derivative of the present disclosure, which is a compound synthesized using gold as a catalyst, has fluorescence characteristics with a wide range of emission wavelengths and thus can be helpfully used in various industrial fields, such as physics, chemistry, and biomedicine research.

An electro-optic element includes a first substrate defining first and second surfaces and a second substrate defining third and fourth surfaces. A first electrically conductive layer is disposed on the second surface and a second electrically conductive layer is disposed on the third surface. An electrochromic medium is disposed in a cavity between the first and second substrates, the electrochromic medium including an anodic component and a cathodic component. At least the anodic component is configured to reversibly attenuate transmittance of light having a wavelength within a predetermined wavelength range when in an electrochemically activated state. The anodic component includes a substituted ketal phenazine compound.

The present disclosure relates to the field of organic light-emitting materials, and more particularly, to a blue thermally activated delayed fluorescence material, a synthesis method thereof, and use thereof. The blue thermally activated delayed fluorescence material has a following structural formula:

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the present disclosure provides a novel blue thermally activated delayed fluorescence material which has a lower singlet triplet energy level difference, a high RISC rate constant (kRISC), and a high photoluminescence quantum yield (PLQY) by finely adjusting a structure of electron acceptor units, making them have different abilities to accept electrons, thereby realizing fine adjustment of spectrum in the deep blue range.

Disclosed are organic electrooptic materials. The electrooptic materials are functionalized by novel methods and structures. The electrooptic materials are structured with a head and a tail where the head and tail sequentially assemble into a non-centrosymmetric ordered array. The electrooptic materials are further structured in covalently bonded dimer pairs where one of the pairs is zwitterionic. The non-centrosymmetric ordered array bonds directly to electrodes which allows for efficient application of the electric field. The organic electrooptic materials disclosed offer greater hyperpolarizability, greater bandwidth, reduced operating voltage with less optical loss.

A light emitting device contains an anode, a cathode, and two organic layer respectively containing metal complexes represented by formulas (1) and (2).

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M.sup.1 and M.sup.2 represent an iridium atom; n.sup.1 and n.sup.3 represent an integer of 1 or more; n.sup.2 and n.sup.4 represent an integer of 0 or more; Ring R.sup.1A represents a triazole ring; Ring R.sup.2 represents an aromatic hydrocarbon ring; E.sup.1, E.sup.2 and E.sup.11A to E.sup.13A represent a nitrogen or a carbon atom; R.sup.11A to R.sup.13A represent a substituent. At least one of E.sup.11A to E.sup.13A is a nitrogen atom, and at least one of R.sup.11A to R.sup.13A bonding to the nitrogen atom is a group represented by (Ar-1A). E.sup.L represents a carbon atom; Ring L.sup.1 represents a 6-membered aromatic hetero ring; Ring L.sup.2 represents an aromatic hydrocarbon ring; and A.sup.1-G.sup.1-A.sup.2 and A.sup.3-G.sup.2-A.sup.4 represent bidentate ligands.

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Ring A represents an aromatic hydrocarbon ring with substituent R.sup.2.

Platinum, palladium, and gold complexes suitable for use as phosphorescent emitters or as delayed fluorescent and phosphorescent emitters having one of the following structures:

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