Provided are compounds comprising a first ligand L.sub.A; wherein L.sub.A 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 L.sub.A does not comprise a structure of Formula I.

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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.

The present invention relates to compounds of the formula (1) which are suitable for use in electronic devices, in particular organic electroluminescent devices, and to electronic devices which comprise these compounds.

A compound represented by the following general formula has excellent light-emitting characteristics and emits light at a short wavelength. Y.sup.1 is N—R.sup.A; Y.sup.2 is O, S, C═O or N—R.sup.A; R.sup.A is an aryl group, etc.; R.sup.1 to R.sup.11 each are a hydrogen atom or a substituent; at least one of R.sup.1 to R.sup.3 is a carbazolyl group substituted with an aryl group, etc.

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The present invention provides oxaborole ester compounds and compositions thereof which are useful to treat diseases associated with parasites, such as Chagas Disease and African Animal Trypanosomosis.

The present invention relates to a phenyl-derivative compound substituted with at least two electron acceptors and at least two electron donors. Formula (I) R.sup.AaR.sup.DbR.sup.ScC.sub.6 wherein a is 2, 3 or 4; b is 2, 3 or 4; c is 0, 1 or 2; a+b−c=6; R.sup.A is at each occurrence independently a group with −M-effect; R.sup.B is at each occurrence independently a group with +−M-effect; R.sup.S is as defined in claim 1. Said compound is suited for use in organic electronic devices, particularly in organic electroluminescent devices.

An organic electroluminescence device (OLED) of an embodiment includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode The emission layer may include a condensed polycyclic compound represented by Formula 1, which is connected to two or three substituents represented by Formula 2, and the OLED may exhibit excellent luminous efficiency: ##STR00001##

An organic electroluminescence device of an embodiment includes a first electrode, a second electrode, and an emission layer disposed between the first electrode and the second electrode, and the emission layer includes a polycyclic compound represented by Formula 1. The organic electroluminescence device may exhibit high luminous efficiency and/or service life characteristics: ##STR00001##

The present disclosure relates to a boron compound useful in an organic light-emitting diode and an organic light-emitting diode comprising same and, more particularly, to a boron compound represented by [Chemical Formula A], wherein [Chemical Formula A] is as defined in the description.

A compound of Formula I,

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is disclosed. In Formula I, M is Pd or Pt; each of X.sup.1 to X.sup.12 is C or N; each of X.sup.13 and X.sup.14 is CH, CD or N; each of Z.sup.1, Z.sup.2, and Z.sup.3 is C or N; L.sup.1 is selected from a variety of bivalent linkers; X is selected from O, S, Se, NR′, and CR″R′″; each R, R′, R.sup.1, R.sup.2, R.sup.3, R.sup.A, R.sup.B, R.sup.C, R.sup.D, and R.sup.E is hydrogen or a General Substituent; at least one of Z.sup.1, Z.sup.2, and Z.sup.3 is a carbon atom substituted with a substituent with a molecular weight of at least 16. Formulations, OLEDs, and consumer products that include Formula I are also disclosed.

There is provided a polycyclic aromatic compound having a single boron-nitrogen bond and including a core structure of Core A, Core B, or Core C

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In the formulas: Q.sup.1 and Q.sup.2 are the same or different and are a single bond, O, S, NR.sup.12, BR.sup.12, CR.sup.13R.sup.14, or SiR.sup.13R.sup.14; and R.sup.12-R.sup.14 are the same or different and are alkyl, carbocyclic aryl, heteroaryl, or substituted derivatives thereof.