In a recent study published in Nanoscale, researchers show increases in cooling time for poorer hydrocarbon solvents compared to better solvents, indicate penetration of solvent into the ligand layer facilitates improved ...
Nanophysics
Jul 29, 2019
0
19
If scientists could find a way to control the process for making semiconductor components on a nanometric scale, they could give those components unique electronic and optical properties—opening the door to a host of useful ...
Nanomaterials
Jul 08, 2019
1
1158
Living organisms form biological minerals during biomineralization, where inorganic elements can selectively deposit on specific organic macromolecules under precise control. The process can be divided into biocalcification ...
Researchers have synthesized a tiny structure from 32 gold atoms. This nanocluster has a core of 12 gold atoms surrounded by a shell of 20 additional gold atoms. As the scientists report in the journal Angewandte Chemie, ...
Nanomaterials
Mar 21, 2019
0
150
RUDN chemists have synthesized metal complexes on the basis of the organoelemental substance silsesquioxane that consists of an organic and an inorganic part. Such hybrid systems may be used as efficient catalysts, for example, ...
Materials Science
Mar 04, 2019
0
27
A RUDN chemist has obtained a compound with a new structural type containing atoms of metals (copper and sodium) in a carcass structure and that is shaped like a bicycle helmet. The compound shows catalytic activity in two ...
Materials Science
Feb 18, 2019
0
74
An international scientific group including a RUDN chemist have developed a complex copper-based compound with stronger antibacterial properties compared to analogs, and is cheaper to produce. The scientists confirmed that ...
Biochemistry
Feb 13, 2019
0
7
A strategy to invert the chirality of a metal-containing helical molecule controlling the speed of the response is reported in Chemistry, A European Journal by researchers at Kanazawa University.
Materials Science
Feb 06, 2019
0
7
Growth factors are ligands that play important roles in the body—they are responsible for tissue regeneration, wound healing, and the maintenance and growth of cells. Stimulating growth factor-dependent pathways is therefore ...
Biochemistry
Jan 28, 2019
0
8
Cells communicate through complex mechanisms that typically involve receptors and ligands that bind to them. Endogenous ligands, produced by the body, have been identified for the vast majority of cellular receptors, helping ...
Cell & Microbiology
Jan 14, 2019
0
3
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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