Table 1 The values of the fitting parameters (apparent formation constants for each binding site and the molar absorption coefficient of the coordination compounds) determined using the model function to fit the Job plots of four ETs (Eq. (3)). The average p\(K_\textrm{a}\) values of ETs VI, CI, VG, and CG are also given for the binding sites. Standard formation Gibbs free energies were calculated from the corresponding apparent formation constants.
From: Model for the description of interactions between ellagitannins and Fe(II) ions
Binding site | \(\overline{\text {p}{\textit{K}}_{a}}\) | \({\text {log} \textit{K}}_{\text {f}}\) | \(\Delta \textit{G}_{\text {r}}^{\ominus }\) | \(\varvec{\epsilon }_\text {model}\) |
|---|---|---|---|---|
\(\text {(kJ~mol}^{-1}\text {)}\) | (L mol\(^{-1}\) cm\(^{-1}\)) | |||
NHTP-A | \(6.93\pm 0.13\) | \(7.27\pm 0.03\) | \(-41.47\pm 0.18\) | \((4.174\pm 0.003)\cdot 10^{3}\) |
NHTP-B | \(7.56\pm 0.08\) | \(8.05\pm 0.03\) | \(-45.94\pm 0.18\) | |
HHDP | \(6.97\pm 0.002\) | \(7.89\pm 0.03\) | \(-45.02\pm 0.15\) |
