Temperature dependent 1 H NMR spectra were recorded for S12 sample at 5 g/L concentration, within D2O containing 0.1 w% deuterated trimethylsilyl propionic acid sodium salt (Alfa Aesar, Haverhill, MA, U.S.) as an internal reference with the Avance III 500 MHz spectrometer (Bruker, Mannheim, Germany). Measurements were made (64 scans) within the range of 10 °C to 80 °C in 5 °C steps and 10 minutes equilibrium time.