| Abstract: | Reduction of charged or uncharged substrates by a copolymer of N-(p-vinylbenzyl)-1,4-dihydronicotinamide and sodium styrene-p-sulfonate (PNAH) in aqueous solutions was investigated. Electrostatic interaction of PNAH with charged substrates led to a far more effective reduction of crystalviolet (CV) and a far less effective reduction of potassium ferricyanide (FeC) than the monomer model N-benzyl-1,4-dihydronicotinamide (BNAH)] system. In the PNAH-CV system, in particular, a rapid reduction occurs by a first-order process because of the remarkable concentration effect of the polymer. Furthermore, this reduction was not appreciably affected by an added salt, suggesting the presence of hydrophobic interaction between PNAH and CV. |
