Controlled COOH functional group

The polarization characteristic of a corroding metal can be controlled by various additives to the solution, called corrosion inhibitors, which adsorb on the metal and lower the rates of the cathodic and/or anodic reaction. Inhibitors are used primarily for acidic electrolyte solutions, sometimes also for neutral solutions. Various organic compounds with -OH, -SH, -NHj, -COOH, and so on, as the functional groups are used as inhibitors. The effects of an organic inhibitor, tetradecylpiperidinium... 

The introduction of functional groups (halogen, CN, COOH, NH2, etc.) into the organic part of the molecule is a way for a controlled modification of silicone polymers. These groups increase the polarity of the molecule and the intermolecular forces of interaction between the chains, which has a positive effect on the mechanical and adhesive characteristics of the polymers. 

The versatility of the Claisen rearrangement for the synthesis of functionally substituted y, 8-unsaturated carbonyl compounds has been greatly enhanced by the introduction of various vinyl ether appendages. These not only participate in the stereochemical control of the rearrangement, but also determine the nature of the functional group in the product (-CHO, -COR, -COOH, -COOR, -CONR2). 

Amino acids [8] Nanocubes - double hydrophilic functional groups (-NH2 and -COOH to control growth... 

In addition to the commercially available water-soluble polymers for the treatment of wastewater (37,38), the incorporation of various functional groups (eg, —OH, —COOH, and —SO3H) onto microemulsion polymer particle surfaces for biomedical applications certainly deserves more attention (39). These functionalized latex particles with a diameter of 20-30 nm exhibit an extremely large particle surface area and they are especially effective for the adsorption of proteins, immobilization of enzymes and antibodies, and controlled drug delivery. 

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