Reduction of 2,3,5-triphenyl-2H-tetrazolium chloride in the presence of polyelectrolytes containing 4-styrenesulfonate moieties.
The redox behavior of 2,3,5-triphenyl-2H-tetrazolium chloride (TTC) in the presence of different polyelectrolytes such as poly(sodium 4-styrenesulfonate) (PSS), poly(sodium 4-styrenesulfonate-co-sodium maleate) at two different comonomer compositions (P(SS(1)-co-MA(1)) and P(SS(3)-co-MA(1))), poly(sodium acrylate-co-sodium maleate) (P(AA(1)-co-MA(1))), and poly(sodium acrylate) (PAA) is studied. Due to aromatic-aromatic interactions, the polyelectrolytes containing benzene sulfonate groups produce a decrease on the reduction rate of TTC in the presence of ascorbic acid (ASC) and a shift of the anodic and cathodic peaks to higher negative potentials for the electrochemical reaction of TTC. As an important conclusion, these effects are a function of the linear aromatic density of the polyelectrolytes.
Moreno-Villoslada
Ignacio
I
Instituto de Química, Facultad de Ciencias, Universidad Austral de Chile, Casilla 567, Valdivia, Chile. imorenovilloslada@uach.cl
Soto
Marcos
M
Gonzalez
Felipe
F
Montero-Silva
Francisco
F
Hess
Susan
S
Takemura
Ichiro
I
Oyaizu
Kenichi
K
Nishide
Hiroyuki
H
D001205:Ascorbic Acid / Q000737:chemistry; D004563:Electrochemistry; D004573:Electrolytes / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D015394:Molecular Structure; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry*; D013451:Sulfonic Acids / Q000737:chemistry*; D013778:Tetrazolium Salts / Q000737:chemistry*
D004573:Electrolytes; D011108:Polymers; D013451:Sulfonic Acids; D013778:Tetrazolium Salts; C009591:triphenyltetrazolium; D001205:Ascorbic Acid; C077114:styrenesulfonic acid polymer