Secondary relaxations in supercooled and glassy sucrose–borate aqueous solutions

Diffusion−Viscosity Decoupling in Supercooled Aqueous Trehalose Solutions

“…They were calculated from the measured electrical conductivity and viscosity using eq 2 with stick conditions. The results correspond to NaCl in sucrose aqueous solutions 26 at concentrations between 65.11 and 76.17 wt % and temperatures between -20 and +50 °C, NaCl in trehalose aqueous solutions 26 at 68.07 wt % and temperatures between -20 and +45 °C, tetrabutylammonium bromide in sucrose aqueous solution 27 at 76.27 wt % and temperatures between -15 and +35 °C, and tetrabutylammonium iodide in trehalose aqueous solution 27 at 39.13 wt % and temperatures between -5 and +20 °C. Also plotted are the values in pure water.…”

“…Similar results were observed for the decoupling of the electrical molar conductivity, Λ, and the viscosity of simple salts (NaCl, LiCl, MgCl 2 ) in aqueous solutions of trehalose and sucrose. [25][26][27] In that case the Walden law…”

“…Figure 7. Inverse hydrodynamic radius of NaCl sucrose (O) and trehalose (b) solutions, (C 4H9)4NBr in sucrose (∆) and trehalose (2) solutions, calculated from the measured Walden product (Λη),26,27 and fluorescein calculated from the measured diffusion coefficient in aqueous trehalose(9) and water (0).…”