Binding of methyl orange and the hydrophobic fluorescent probe, 2‐p‐toluidinylnaphthalene‐6‐sulfonate, by 2‐dialkylaminoethyl methacrylate‐N‐vinyl‐2‐pyrrolidone and related copolymers

Abstract

AbstractThe copolymers of N‐vinyl‐2‐pyrrolidone and 2‐dimethylaminoethyl methacrylate, 2‐diethylaminoethyl methacrylate, 2‐dimethylaminoethyl acrylate, or 2‐dimethylaminopropyl acrylamide have been prepared. Studies were made of the binding of a “binding probe,” methyl orange, by the copolymers in aqueous solution. The first binding constants accompanying the binding were evaluated. Furthermore, the intensity of fluorescence of a hydrophobic fluorescent probe, 2‐p‐toluidinylnaphthalene‐6‐sulfonate, in the presence of these polymers was investigated. The nature and phenomena of dye binding and hydrophobic fluorescent probe binding with the polymers are discussed.