The present invention relates to the preparation of novel nickel complexes containing iminopyrrolyl-type ligands, having the general molecular structure (I), and to their use as active catalysts in the polymerisation reaction of ethylene to hyperbranched polyethylene. The structure of the ligand precursor is such that it allows the occurrence of a cyclometallation reaction by the activation of a C—H bond, in the coordination reaction to the metal centre, generating a C,N,N′-tridentate complex.

The present invention relates to the preparation of novel nickel complexes containing iminopyrrolyl-type ligands, having the general molecular structure (I), and to their use as active catalysts in the polymerisation reaction of ethylene to hyperbranched polyethylene. The structure of the ligand precursor is such that it allows the occurrence of a cyclometallation reaction by the activation of a C—H bond, in the coordination reaction to the metal centre, generating a C,N,N′-tridentate complex.

Disclosed are N-heterocyclic carbene (NHC) and 4-pyridinol-derived pincer ligands and metal complexes containing these ligands. These compounds can be used to photocatalyticaly reduce CO.sub.2 to CO.

Disclosed are N-heterocyclic carbene (NHC) and 4-pyridinol-derived pincer ligands and metal complexes containing these ligands. These compounds can be used to photocatalyticaly reduce CO.sub.2 to CO.

Disclosed herein are metal complexes that exhibit multiple radiative decay mechanisms, together with methods for the preparation and use thereof.

Disclosed herein are metal complexes that exhibit multiple radiative decay mechanisms, together with methods for the preparation and use thereof.

A green route for preparing a metal organic framework include mixing metal precursor with a ligand precursor to form a solvent-free mixture; adding droplets of water to the mixture; heating the mixture at a first temperature after adding the water; and isolating the metal organic framework material including the metal and the ligand.

Metal coordination complexes comprising at least one diazabutadiene based ligand having a structure represented by: ##STR00001## where A.sub.1, A.sub.2, A.sub.3, and A.sub.4 are atoms in a 6-membered ring and are independently selected from C, N, O, S, and P; and where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are independently selected from the group consisting of H, amino groups, C1-C6 alkyl groups, or C4-10 cycloalkyl groups; and further provided that alkyl groups may optionally contain silicon; and where the metal coordination complex is capable of participating in a Diels-Alder type reaction with a dienophile. Processing methods using the metal coordination complexes are also described.

Metal coordination complexes comprising at least one diazabutadiene based ligand having a structure represented by: ##STR00001## where A.sub.1, A.sub.2, A.sub.3, and A.sub.4 are atoms in a 6-membered ring and are independently selected from C, N, O, S, and P; and where R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, and R.sub.6 are independently selected from the group consisting of H, amino groups, C1-C6 alkyl groups, or C4-10 cycloalkyl groups; and further provided that alkyl groups may optionally contain silicon; and where the metal coordination complex is capable of participating in a Diels-Alder type reaction with a dienophile. Processing methods using the metal coordination complexes are also described.

Provided herein are a symmetrical pincer metal and bimetallic complexes. The symmetrical pincer metal complex includes a structure according to Formula I: ##STR00001##
wherein M is a metal; each N and N′ is independently nitrogen or carbon; Z is selected from the group consisting of CH, C, and N; n is 0-3; each L is independently a neutral or charged ligand; and each R is independently an alkyl, Nx, CH.sub.2TMS. The symmetrical bimetallic complex includes a structure according to Formula II: ##STR00002##
wherein M is a metal; each N and N′ is independently nitrogen or carbon; Z is selected from the group consisting of CH, C, and N; n is 0-3; each L is independently a neutral or charged ligand; and wherein each R is independently an alkyl, Nx, CH.sub.2TMS. Also provided herein is a method of catalyzing a reaction including administering one or more of the compounds disclosed herein.