According to an aspect of the present disclosure, a compound having a metal planar tetradentate coordination configuration is disclosed. In the compounds, the metal M is Pt or Pd; the four coordinating atoms are Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 and are each selected from N, C, and O. The compound includes a substituent R, and atoms M, Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4 are used to define a first plane that passes through the metal M and is positioned to have a minimum sum of shortest distances with Z.sup.1, Z.sup.2, Z.sup.3, and Z.sup.4. At least one non-hydrogen atom in R falls within a distal circle of a cylinder extending perpendicular to the first plane, where the distal circle of the cylinder is a height h from the base circle and the height h ranges from 3.3 Å to 4.8 Å.

This disclosure relates to N-substituted Pd(II)-N-heterocyclic carbene-pyridine complexes, methods of preparing the complexes, and methods of using the complexes in Sonogashira coupling reactions.

This disclosure relates to solid-supported bridged Pd(II)—N-heterocyclic carbene catalysts, methods of preparing the catalysts, and methods of using the catalysts in carbonylative Sonogashira coupling reactions.

Metal-assisted delayed fluorescent emitters employing benzo-imidazo-phenanthridine and analogues for full color displays and lighting applications.

An organic light emitting diode having a substrate, a first electrode, a hole transporting layer proximate the first electrode, a second electrode, an electron transporting layer proximate the second electrode, and an emissive layer between the hole transporting layer and the electron transporting layer. The emissive layer includes a square planar tetradentate platinum or palladium complex, and excimers formed by two or more of the complexes are aligned such that emitting dipoles of the excimers are substantially parallel to a surface of the substrate.

The invention relates to a family of Pd(II)-based catalysts of general formula (I) reproduced below for use in the production of olefin/polar vinyl monomer copolymers and olefin homopolymers. The invention also refers to ligands that are intermediates in the synthesis of the catalysts, to the process for the synthesis of homo- and copolymers using these catalysts, and to the homo- and copolymers thus obtained.

In one aspect, phosphine compounds comprising three adamantyl moieties (PAd.sub.3) and associated synthetic routes are described herein. Each adamantyl moiety may be the same or different. For example, each adamantyl moiety (Ad) attached to the phosphorus atom can be independently selected from the group consisting of adamantane, diamantane, triamantane and derivatives thereof. Transition metal complexes comprising PAd.sub.3 ligands are also provided for catalytic synthesis including catalytic cross-coupling reactions.

A method of preparing a 2,6 disubstituted anilines includes, reacting a 2-amino isophthalic acid diester with sufficient Grignard reagent R.sub.2CH.sub.2MgX to form the corresponding diol product, dehydrating the diol product to the corresponding dialkene; and hydrogenating the diol product to form the corresponding aniline. The 2,6 disubstituted anilines can be used to produce N-Heterocyclic Carbenes (NHCs). The NHCs can find application in various fields such as organic synthesis, catalysis and macromolecular chemistry. Palladium catalysts containing the NHCs are also described.

This invention concerns a versatile and simple one-pot method to prepare nanomaterials, and in particular nanoparticles, grafted with an ultra-thin layer of calixarenes by placing at 5 least one oxidized metal with at least one calix[n]arene diazonium salt in the presence of a reducing agent in a solvent, and heating the traction mixture to obtain a metal-based nanomaterial coated with calix[n]arenes. The invention further concerns the coupling of organic molecules or biomolecules to the calixarene-grafted nanomaterials in order to further functionalize the surface of the particles. The metal-based nanomaterial coated with 10 calix[n]arenes can for example be used in immunoassays.

Provided herein, in part, is a new class of sterically bulky, easily prepared N-heterocyclic carbene (NHC) ligands of Formula I, or a salt, solvate, geometric isomer, or stereoisomer thereof. The ligands are readily synthetically accessible exploiting the cost-effective, modular alkylation of anilines. The NHC ligands of the present disclosure can be used to prepare effective catalysts with transition metals, including the compound of Formula II, or a salt, solvate, geometric isomer, or stereoisomer thereof. In certain embodiments, the transition metal is Pd.