Premium
Poly( N ‐vinylcaprolactam) gel/organic dye complexes as sensors for metal ions in aqueous salt solutions
Author(s) -
Nasimova I. R.,
Makhaeva E. E.,
Khokhlov A. R.
Publication year - 2001
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1778
Subject(s) - dithizone , aqueous solution , chloroform , metal ions in aqueous solution , chemistry , salt (chemistry) , chelation , inorganic chemistry , metal , nuclear chemistry , polymer chemistry , organic chemistry
The complex formation of organogels based on poly( N ‐vinylcaprolactam) (PVCa) and organic dyes [5‐(4‐dimethylaminobenzylidene) rhodanine, α‐nitroso‐β‐naftol, and dithizone] and the properties of the complexes in salt aqueous solutions were studied. PVCa gels absorbed these dyes in organic media (ethanol and chloroform). Our main focus was the behavior of the gel/dye complex immersed in a salt aqueous solution if the dye was the chelating ligand for metal ions. The behavior of the PVCa/dithizone (Dz)/chloroform system was studied in AgNO 3 aqueous solutions. The absorption spectra of gel/dye and gel/dye/metal ion systems were investigated. The results obtained indicate that Ag + ions penetrate the gel phase and that the Dz/silver complexes are indeed formed inside the gel. The dependence of the optical density of the gel/dye/metal ion systems on the AgNO 3 concentration was observed. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 81: 3238–3243, 2001