Determination of Metal ion Binding Properties of Cu (II) and Zn (II) Ions with L-Aspartic Acid and L-Lysine Complexed with NNMBA

The present work reports the metal ion binding properties of Cu (II) and Zn (II) ions with L-Aspartic acid and L-Lysine complexed 2 mol % NNMBA crosslinked polyacrylamide. Swelling studies of cross-linked polymer, ligand attached polymer and metal-attached polymer were also described. Crosslinked polymers with certain qualities are commonly employed as catalyst supports because they are inert, non-toxic, and non-volatile, and they bring the benefits of heterogeneous catalysis to homogeneous systems, such as thermal stability, selectivity, and recyclability. The simplicity of separation from the reaction products increases operating flexibility. Moreover, the amount of metal present on the surface of such catalyst is very small which is of economic significance in the case of expensive metals. Metal ion binding properties of transition metal ions Cu (II) and Zn (II) with amino acids L-Aspartic acid (L-Asp) and L-Lysine (L-Lys) supported 2 mol % N,N’-methylene bisacrylamide (NNMBA) crosslinked polyacrylamide have been studied. These polymeric ligands are extremely hydrophilic, as demonstrated by the swelling investigations. The polymer, transamidated polymer, and polymer metal complexes were analyzed using scanning electron microscopy (SEM), ultra violet (UV), and infrared radiation. From carboxyl capacity measurements, SEM analysis and swelling studies it was established that the more complexation of the metal ion is found with the ligand L-Aspartic acid. We have obtained a greater carboxyl capacity value for Aspartic acid than Lysine attached polymer, indicating more complexation associated with the ligand Aspartic acid. From swelling studies and SEM analysis also it was established that the more complexation of the metal ion is found with the ligand L-Aspartic acid.