The chelating agent is a type of compound that can form a stable coat with metal ions. They form chemical bonds by free electrons in metal ions or coordinate sites to form stable complexes. The chelating agent usually has multiple coordinate sites, which can form multiple container bonds with metal ions to enhance the stability of the complex.
The principle of the role of chelating agent involves the following aspects:
Fringe key formation: The free electron pairing of the coordinator in the chelating agent and the free electrons of the metal ion or the coordinate site formation key formation is established, and a chemical key is established. The formation of this coating key makes the metal ions closely combines with chelators to form complexity.
Complement of charge: Chelators usually have the corresponding chemical properties, so that it can attract each other with metal ions. For example, metal ions with positive charges can form the control bond with the coordinate site in the chelating agent with negative charge.
Space position resistance effect: The coordination site in chelating agents is usually surrounded by the surrounding group environment, forming a spatial block. This position can limit the reaction between metal ions and other substances and increase the stability of the complex.
The number of stable parts: The chelating agent can provide multiple coordinate sites, so that a chelated agent can form a control button with one or more metal ions at the same time. The formation of multiple containers has increased the stability of the complex.
To sum up, the principle of the function of chelating agent is formed by occurring with metal ions, and the use of charge complementary and spatial blocking effects is used to stabilize metal ions, and because the chelated agent provides multiple coordinate sites, the complex has a complex to have the possession of the complex to have the possession of the complex. Higher stability. Chelators are widely used in many fields, such as the separation and enrichment of metal ions, catalytic reactions, and drug transmission.