Metal Ion Chelation
Metal Ion Chelation - Related Videos
02:51
Metal-Ligand Bonds
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2020
The hemoglobin in the blood, the chlorophyll in green plants, vitamin B-12, and the catalyst used in the manufacture of polyethylene all contain coordination compounds. Ions of the metals, especially the transition metals, are likely to form complexes. In these complexes, transition metals form coordinate covalent bonds, a kind of Lewis acid-base interaction in which both of the electrons in the bond are contributed by a donor (Lewis base) to an electron acceptor (Lewis acid). The Lewis acid in...
11:04
Ion Mobility-Mass Spectrometry Techniques for Determining the Structure and Mechanisms of Metal Ion Recognition and Redox Activity of Metal Binding Oligopeptides
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Cited by 8 •
2019
Ion mobility-mass spectrometry and molecular modeling techniques can characterize the selective metal chelating performance of designed metal-binding peptides and the copper-binding peptide methanobactin. Developing new classes of metal chelating peptides will help lead to therapeutics for diseases associated with metal ion misbalance.
09:38
Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
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Cited by 1 •
2018
Fabrication procedures for highly magnetically responsive lanthanide ion chelating polymolecular assemblies are presented. The magnetic response is dictated by the assembly size, which is tailored by extrusion through nanopore membranes. The assemblies' magnetic alignability and temperature-induced structural changes are monitored by birefringence measurements, a complimentary technique to nuclear magnetic resonance and small angle neutron scattering.
03:45
Formation of Complex Ions
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2020
A type of Lewis acid-base chemistry involves the formation of a complex ion (or a coordination complex) comprising a central atom, typically a transition metal cation, surrounded by ions or molecules called ligands. These ligands can be neutral molecules like H2O or NH3, or ions such as CN− or OH−. Often, the ligands act as Lewis bases, donating a pair of electrons to the central atom. These types of Lewis acid-base reactions are examples of a broad subdiscipline called coordination...
02:32
Bonding in Metals
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2020
Metallic bonds are formed between two metal atoms. A simplified model to describe metallic bonding has been developed by Paul Drüde called the “Electron Sea Model”. Electron Sea Model Most metal atoms do not possess enough valence electrons to enter into an ionic or covalent bonding. However, the valence electrons in metal atoms are loosely held due to their low electronegativity or attraction with the nucleus. The ionization energy of metal atoms (energy required to remove an electron from...
FAQs
Stability is strongly influenced by how a ligand’s donor atoms are arranged. When the same ligand can coordinate through multiple oxygen, nitrogen, or sulfur sites, the resulting complex may contain one or more rings. This structural arrangement helps explain why different ligands can bind the same metal ion with different degrees of stability.
Metal identity and solution pH are central variables in chelation outcomes. The same ligand may behave differently with different metal ions, while changing pH can alter complex stability. Researchers therefore consider both factors when interpreting coordination behavior or designing systems for metal-ion detection, separation, or controlled availability in aqueous samples.
Chelation uses multiple donor atoms from a single ligand, allowing the metal center to form several coordinate covalent interactions with that ligand. This arrangement can produce one or more rings, unlike coordination involving only one donor site. The distinction is important when comparing complex structures and explaining differences in stability or behavior.
Chelation supports analytical methods by linking metal-ion behavior to ligand structure, metal identity, and solution conditions. Because complex stability varies with these factors, researchers can investigate which metal ions form more favorable complexes under selected conditions. These differences provide a chemical basis for detecting or separating metal ions in analytical systems.
In aqueous systems, chelation helps control the availability of metal ions by placing them in coordination complexes. Water-treatment strategies can therefore use the relationship between ligand structure, metal identity, and pH to manage metal-ion behavior. This approach applies the same coordination principles used to study stability and separation in solution.
Chelation helps explain complex metal-ion behavior in biological and environmental samples, where solution conditions and available donor groups influence coordination. Studying these interactions can clarify how metal availability is controlled in aqueous settings. The same principles also guide analytical methods, water treatment, and the design of metal-based compounds.