Metal complexation of polymeric amino ligands derived from N,N′-methylenebis(acrylamide)-crosslinked polyacrylamides

✍ Scribed by Lissy Jose; V. N. Rajasekharan Pillai

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 764 KB
• Volume: 197
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1996.021970702

✦ Synopsis

Abstract

The N,N′‐methylenebis(acrylamide) (NNMBA)‐crosslinked polyacrylamide supported amino ligands undergo complexation with Cr(III), Mn(II), Fe(III), Pb(II) and Cd(II) ions. Complexation is maximum for Cr(III) ion. The metal intake decreases as the crosslinking increases. The NNMBA resin can be reused after complexation and desorption without appreciable reduction in amino capacity. The IR spectrum of the Cr(III) complex gives an additional peak for sulfate complexation and the amino peak undergoes a negative shift, which is a clear evidence of metal coordination through the amino nitrogen. EPR, electronic spectra and magnetic moment are indicative of a distorted geometry for Cu(II), Cr(III), Fe(III) and Mn(II) complexes. Cd(II), Pb(II) complexes are diamagnetic. Complexation brings about vivid changes in the surface morphology of polymeric ligand. The thermal stability of Cr(III) complex increases as the metal content increases.