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Chelation (/ k iː ˈ l eɪ ʃ ən /) is a type of bonding of ions and their molecules to metal ions. It involves the formation or presence of two or more separate coordinate bonds between a polydentate (multiple bonded) ligand and a single central metal atom.
DOTA (also known as tetraxetan) is an organic compound with the formula (CH 2 CH 2 NCH 2 CO 2 H) 4. The molecule consists of a central 12-membered tetraaza (i.e., containing four nitrogen atoms) ring. DOTA is used as a complexing agent, especially for lanthanide ions. Its complexes have medical applications as contrast agents and cancer treatments.
Chelating resins are a class of ion-exchange resins.They are almost always used to bind cations, and utilize chelating agents covalently attached to a polymer matrix. Chelating resins have the same bead form and polymer matrix as usual ion excha
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By altering the properties of the pincer ligands, it is possible to significantly alter the chemistry at the metal centre. Changing the hardness/softness of the donor, using electron-withdrawing groups (EWGs) in the backbone, and the altering the steric constraints of the ligands are all methods used to tune the reactivity at the metal centre.
TPEN (N,N,N ′,N ′-tetrakis(2-pyridinylmethyl)-1,2-ethanediamine [1]) is an intracellular membrane-permeable ion chelator. [2] TPEN has a high affinity for many transition metals and should not be considered specific or selective for a particular ion. Chelators can be used in chelation therapy to remove toxic metals in the body. TPEN is a ...
However, from a more comprehensive and chemistry point of view, they should be described as inert metals. Inert metals are very stable. They are difficult to participate directly in ordinary acid-base reactions and turn into metal compounds. Therefore, they can stay alone in the form of single element in nature.
2,3-Dimercapto-1-propanesulfonic acid (abbreviated DMPS) and its sodium salt (known as Unithiol) are chelating agents that form complexes with various heavy metals. They are related to dimercaprol, which is another chelating agent.