Correlations between solvent polarity scales and electron transfer kinetics and an application to micellar media

Spectrophotometric study of interaction and solubilization of procaine hydrochloride in micellar systems

“…The absorption maxima of procaine hydrochloride showed red shift in cationic and anionic surfactants medium compared with those in aqueous medium. This finding is as expected, because procaine is transferred from a highly polar phase (H 2 O) to a less polar site in the micellar phase; in other words, procaine distributed between micelle/water phases [14,[28][29][30][31][32][33][34]. …”

Electrochemical oxidation of morin and interaction with DNA

“…(5), the value of k s for morin oxidation in phosphate buffer solution (pH = 7.28) in the presence of DNA is k s (DNA) = 251 s − 1 . As the peak currents decreased the k s decreased lightly [38,39], but it is all the same close to the value of k s (GCE). These results suggest that the electrochemical parameters of morin oxidation have no obvious change in the presence or absence of DNA.…”

The Kinetics of Heterogeneous Electron Transfer Reactions in Polar Solvents

“…Examination of the data sunmmarized in Table 2 reveals an unacceptably large range for rate constants reported during the last seven years, namely, from 2x10-2 cm s-1 to 220 s-1 , that is by four orders of magnitude! Ifthe two low results [66,67] and the high result [46] are removed a much more acceptable range, from 1 to 4 cm s-1, is found. It should be noted that differences in electrolyte nature and concentration, and in temperature cause some of the observed scatter in the remaining data.…”

“…Some mention should be made of the model for solvent effects in h1leegeneous rate constants proposed by Abbott et al [67] on the basis of data for the oxidation of ferrocene in 16 non-aqueous solvents. These authors ignored possible dependence of the pre-exponential factor of the rate constant on solvent relaxation, and attributed solvent dependence to variation in AG* with solvent basicity, acidity, polarity, and polaizability.…”