A spectroscopic investigation of complexes of divalent metal ions with maleic acid copolymers

✍ Scribed by S. Paoletti; F. Delben

• Publisher: Elsevier Science
• Year: 1975
• Tongue: English
• Weight: 363 KB
• Volume: 11
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(75)90004-x

✦ Synopsis

Al~tract--The absorption spectra of complexes of copper(lI), nickel(II), and barium(ll) with three partially neutralized maleic acid copolymers in aqueous solution have been investigated in the range 195-720nm. Copper ions are always very strongly bound, giving electron transfer complexes. Relevant spectral features are found to depend on the number of methyl groups in the polymer backbone. and in particular, for each given polymer, on the amount of available ligand negative charge per divalent counterion. The spectra of the complexes of nickel(II) and barium(II) suggest that they interact with the polycarboxylates much more weakly than copper(ll).