The present invention encompasses a catalyst composition that includes a heterogeneous oligomerization catalyst including a metal-organic framework, the metal-organic framework including a plurality of first metal ions coordinated to one or more ligands, wherein each of the one or more ligands has only one N-heterocyclic aromatic group. The present invention further includes a method of oligomerization that comprises contacting one or more olefins with the heterogeneous oligomerization catalyst to form one or more oligomers, wherein the heterogeneous catalyst comprises the said metal-organic framework and an optional support.

The present application provides a mononuclear transition metal complex, a photocatalyst for carbon dioxide reduction including same, and a method for reducing carbon dioxide to formic acid, the method comprising using the photocatalyst for carbon dioxide reduction.

The present invention relates to a ligand compound having a novel structure of the following, a transition metal compound and a catalyst composition including the same:

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Wherein R.sub.1 to R.sub.7, and n are described herein.

The present invention provides a novel ligand compound, a transition metal compound and a catalyst composition including the same.

The present invention discloses a homogeneous, single site catalyst of formula (I) and a process for preparation thereof using a ligand. The present invention further discloses a process for preparation of linear polyethylene of high molecular weight and degree of crystallinity by using the homogeneous, single site catalyst of formula I.

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Methods of preparing oligomers of an olefin are provided. The methods can include providing a composition that includes an alkylaluminum compound, a chromium compound, and a hydrocarbon solvent. The hydrocarbon solvent can include n-undecane, a C8-C11 alkane compound having one branch, or a mixture thereof. The methods can further include contacting an olefin with the composition to form oligomers of the olefin. The olefin can include ethylene, and the oligomers of the olefin can include 1-hexene.

Disclosed are novel analogs of cytisine, a process for their preparation, pharmaceutical compositions containing them, and their use in the prevention of or treatment of CNS disorders including addictive disorders.

A method of synthesizing a doped carbonaceous material includes mixing a carbon precursor material with at least one dopant to form a homogeneous/heterogeneous mixture; and subjecting the mixture to pyrolysis in an inert atmosphere to obtain the doped carbonaceous material. A method of purifying water includes providing an amount of the doped carbonaceous material in the water as a photocatalyst; and illuminating the water containing the doped carbonaceous material with visible light such that under visible light illumination, the doped carbonaceous material generates excitons (electron-hole pairs) and has high electron affinity, which react with oxygen and water adsorbed on its surface forming reactive oxygen species (ROS), such as hydroxyl radicals and superoxide radicals, singlet oxygen, hydrogen peroxide, that, in turn, decompose pollutants and micropollutants.

The present invention provides a novel ligand compound, a transition metal compound and a catalyst composition including the same.

A method of synthesizing a doped carbonaceous material includes mixing a carbon precursor material with at least one dopant to form a homogeneous/heterogeneous mixture; and subjecting the mixture to pyrolysis in an inert atmosphere to obtain the doped carbonaceous material. A method of purifying water includes providing an amount of the doped carbonaceous material in the water as a photocatalyst; and illuminating the water containing the doped carbonaceous material with visible light such that under visible light illumination, the doped carbonaceous material generates excitons (electron-hole pairs) and has high electron affinity, which react with oxygen and water adsorbed on its surface forming reactive oxygen species (ROS), such as hydroxyl radicals and superoxide radicals, singlet oxygen, hydrogen peroxide, that, in turn, decompose pollutants and micropollutants.