Proton Transfer Equilibria and Critical Behavior of H-Bonding

Figure 13

UV spectra of 2,4-dichlorophenol in TBA as a function of temperature: 298 K (1), 223 K (2), 203 K (3), 186 K (4), 165K (5), 143 K (6), 128 K (7). 𝐶=4×10⁻⁴ mol dm⁻³, 𝑑=5 mm, wavenumber of PT form ≅ 32160 cm⁻¹ and HB form ≅ 33840 cm⁻¹ [29].