Synthesis, Characterization and Metal Ion Adsorption Studies on Novel Aromatic Poly(Azomethine Amide)s Containing Thiourea Groups

Abstract

A series of novel ladder-type poly(azomethine amide)s (PAMs) were prepared from new azomethine containing carboxylic acid monomer (TCA) with simple aromatic diamines and aromatic diamines with thiourea groups (TDAs) by means of phosphorylation polycondensation reaction. Molecular weights of the polyamides were evaluated viscometrically, and the inherent viscosities were in the range of 0.31 -0.58 g/dl. These ladder-type polymers were not freely soluble in common organic solvents. Structure of monomers and polymers were confirmed using FT-IR, 1 H-NMR and 13 C-NMR spectroscopic analysis. Removal of Cu 2+ and Cd 2+ from aqueous solutions by adsorption onto the polyamides was investigated. The effect of pH, initial metal ion concentrations and contact time were studied in batch experiments. The polyamides were found to be highly effective adsorbents for the removal of Cu 2+ and Cd 2+ metal ions from aqueous solutions. In a mixture of metal ions, the selectivity order was found to be Pb(II) > Cu(II) > Cr(IV) > Cd(II).

Heat resisting and water-soluble chocolate polyesters containing azomethine group

“…14 shows FE-SEM photographs of P-1, P-2, P-3 and P-4 with different particle sizes. According to FE-SEM images, the polyesters have a highly notched, indented and roughened surface [21,24]. From the AFM and FE-SEM images it is seen that all the polymers have similar surfaces.…”

A study on the removal of Mercury (II) ions from aqueous solution by chemically modified cellulose green adsorbent: Kinetic and equilibrium studies

“…Therefore, the need for low cost solid adsorbents based on natural or synthetic polymers is ever growing. Our group has concentrated in developing synthetic polymeric adsorbents, modification of commercial polymers as adsorbent for various heavy metal ion adsorption from aqueous solution [7][8][9][10][11] . However, synthesis of these polymeric adsorbents is costlier and the disposal of spent adsorbent may cause environmental problems.…”

“…The most abundant and renewable polymer resource available is cellulose worldwide. By photosynthesis, 10 11 -10 12 tons of cellulose were periodically synthesized in a relatively stable and pure form 12 since native cellulose has a very poor metal adsorption capacity it is modified to have good adsorption capacity towards cellulose. The main approaches has been derived to convert the cellulose into modified cellulose bearing metal binding ligands which are efficient for the adsorption of metal ions from aqueous media.…”

Synthesis and characterization of fluorinated poly(azomethine ether)s from new core-fluorinated azomethine-containing monomers

“…They often display liquid crystalline (LC) behavior at room temperature as well as ability to form chelates with metals. [1][2][3][4][5][6][7][8] As a consequence, PAMs have a potential for numerous application in electronics, optoelectronics, photonics, and sensors. [6][7][8] PAMs can be synthesized in a traditional approach (also known as polyazomethine route) by a reaction of dialdehydes with diamines.…”

“…[1][2][3][4][5][6][7][8] As a consequence, PAMs have a potential for numerous application in electronics, optoelectronics, photonics, and sensors. [6][7][8] PAMs can be synthesized in a traditional approach (also known as polyazomethine route) by a reaction of dialdehydes with diamines. [4,[9][10][11][12][13][14][15][16] Unfortunately, the produced polymers are characterized by limited solubility in the most of common organic solvents.…”