Studies on oligomeric Azo dye and their chelating properties

Abstract

The created analysis work includes the synthesis, characterization and chelating properties of Azo-Salicylic acid aldehyde resins. Therefore its best thanks to represent the literature concerning, newlineand#61656; Polymeric ligands newlineand#61656; Salicylic acid-formaldehyde resin as polymeric ligand newlineand#61656; Polymeric azo dyes newline newlineThough polymeric chelates are forming a subclass of coordination polymers, it is regarded as a special kind of coordination polymers in which one or more chelates rings are present in the repeat unit of polymer. It should be noted that the use of term metal complex as a synonym for metal chelates is often in use. The number and variety of macromolecules recognized as having the ability to chelates are so large that it is a difficult task to mention exhaustively. Hence, in the present section a brief introduction has been given about few of most important polymers forming metal chelates with different metal ions showing special properties for various applications. newlineChelating agents are becoming of increasing importance in analytical chemistry such as in gravimetric, titrimetric and colorimetric measurements. New types of chelates and chelating agents are constantly under investigation, for possible analytical and industrial applications. The ever increasing number of publications on this subject may realize the growing importance of the use of metal chelates in analytical chemistry. newline newlineMost of chelates forming ligands are investigated from at least three points of view, as the properties of resulting polymer chelates depends upon these three functional factors. newline1. Structure and nature of chelating ligand [L] newline2. Coordination number of central metal atom [M] 3. Type of bonds formed between metal and ligand [M and L]