Table 1.

Thermodynamic parameters quantified from the isothermal titration calorimetry analysis of the interaction between catechin and polymers. Titrations were run at 40 °C and units of the change in enthalpy (ΔH) and the change in Gibbs free energy (ΔG) are kcal/mol; the change in entropy (ΔS) is kcal/mol·°C; K is the binding constant (10⁴ M⁻¹).

Polymer added	ΔH	ΔG	ΔS	K
PEI	−55.62	−7.15	−1.21	9.71
PEI-diselenide	−25.69	−6.58	−0.48	3.88
Hyaluronic acid	−0.30	−2.87	0.06	0.01