Inexpensive iron salts are a key to simplifying the manufacture of essential precursors for drugs and other chemicals, according to scientists at Rice University.
Materials Science
Jan 5, 2023
0
180
Chemists from Rice University and the University of Texas at Austin discovered more isn't always better when it comes to packing charge-acceptor molecules on the surface of semiconducting nanocrystals.
Nanomaterials
Jan 4, 2023
0
102
RUDN University chemists have created new copper-containing metallasilsesquioxane frameworks. Some of them have proven to be effective catalysts for the oxidation of hydrocarbons. The results are published in Molecules.
Analytical Chemistry
Dec 28, 2022
0
62
Recently, a Chinese research team led by Prof. Guo Chang at the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) managed to catalyze an asymmetric propargyl substitution reaction ...
Materials Science
Dec 9, 2022
0
14
EPFL researchers have discovered that it is not just molecular density, but also pattern and structural rigidity, that control super-selective binding interactions between nanomaterials and protein surfaces. The breakthrough ...
Biochemistry
Nov 22, 2022
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37
Hung-Jen Wu, associate professor in the Artie McFerrin Department of Chemical Engineering at Texas A&M University, is working to defeat bacteria that have become resistant to multiple types of antibiotics. To achieve interdisciplinary ...
Biochemistry
Nov 4, 2022
0
122
The discovery of a peculiar protein structure and the quest to confirm it has led to the description of interacting receptor clusters on natural killer (NK) cells. The study by the research team of Dr. Ondřej Vaněk from ...
Biochemistry
Sep 20, 2022
0
118
Vinyl polymerization (polymerization of vinyl compounds) is a useful method for preparing sp3-carbon-based main-chain polymers including commodity plastics, where the polymer backbone is constructed from a two-carbon unit ...
Polymers
Sep 2, 2022
0
36
Metabolic diseases, including diabetes, fatty liver, and obesity, have become a major "killer" affecting human health. Studies have shown that some orphan receptors could be targets for the treatment of these diseases. GPR119, ...
Biochemistry
Aug 18, 2022
0
21
A new research paper was published in Oncotarget on August 3, 2022, entitled, "A novel mechanism of regulation of the oncogenic transcription factor GLI3 by toll-like receptor signaling."
Cell & Microbiology
Aug 9, 2022
0
37
In coordination chemistry, a ligand is an ion or molecule (see also: functional group) that binds to a central metal atom to form a coordination complex. The bonding between metal and ligand generally involves formal donation of one or more of the ligand's electron pairs. The nature of metal-ligand bonding can range from covalent to ionic. Furthermore, the metal-ligand bond order can range from one to three. Ligands are viewed as Lewis bases, although rare cases are known involving Lewis acidic "ligands."
Metal and metalloids are bound to ligands in virtually all circumstances, although gaseous "naked" metal ions can be generated in high vacuum. Ligands in a complex dictate the reactivity of the central atom, including ligand substitution rates, the reactivity of the ligands themselves, and redox. Ligand selection is a critical consideration in many practical areas, including bioinorganic and medicinal chemistry, homogeneous catalysis, and environmental chemistry.
Ligands are classified in many ways: their charge, their size (bulk), the identity of the coordinating atom(s), and the number of electrons donated to the metal (denticity or hapticity). The size of a ligand is indicated by its cone angle.
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