An investigation of the interaction between polyvinylpyrrolidone and metal cations

✍ Scribed by Manhong Liu; Xiaoping Yan; Hanfan Liu; Weiyong Yu

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 328 KB
• Volume: 44
• Category: Article
• ISSN: 1381-5148
• DOI: 10.1016/s1381-5148(99)00077-2

✦ Synopsis

The interaction between polyvinylpyrrolidone (PVP) and metal cations has been studied in absolute ethanol and water at n 1 room temperature and atmospheric pressure. The UV-VIS and IR absorption spectra of metal cations, PVP and PVP-M n 1 31 21 21 (M 5 Fe , Co , Ni ) were given. It was shown that PVP and metal cations formed unstable complexes, and the coordination stability constants were determined according to the Miller-Dorough method. The stability constants of 31 21 21 PVP-Fe and PVP-Co were lower than 10 and 0.6, respectively, and that of PVP-Ni was too low to be estimated. The 31 21 solid complexes of PVP-Fe and PVP-Co were also synthesized under proper conditions.