TY  - JOUR
AU  - Calandrini, Vania
AU  - Deriu, Antonio
AU  - Onori, Giuseppe
AU  - Paciaroni, Alessandro
AU  - Telling, Mark T F
TI  - Pressure effect on water dynamics in tert-butyl alcohol/water solutions
JO  - Journal of physics / Condensed matter Condensed matter
VL  - 18
IS  - 36
SN  - 1361-648X
CY  - Bristol
PB  - IOP Publ.80390
M1  - FZJ-2019-01844
SP  - S2363 - S2371
PY  - 2006
AB  - We report here a quasi-elastic neutron scattering (QENS) investigation of the effect of pressure on the diffusivity properties of water in a dilute aqueous solution of hydrophobic molecules (tert-butyl alcohol, TBA). The experiment was performed at fixed TBA concentration (0.02 molar fraction) by varying pressure from 1 to 2000 bar at two different temperatures (268 and 278 K). The quasi-elastic line-shapes have been analysed in terms of a model based on the memory function formalism. Our data indicate that, on increasing pressure up to 2000 bar, the diffusion coefficient of water in the TBA/water mixture exhibits a relative increase larger than that of pure water under the same thermodynamic conditions. The extent of this effect increases with decreasing temperature. The observed behaviour is described in terms of pressure-induced distortions of the H-bonded random network of liquid water.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000241232700011
DO  - DOI:10.1088/0953-8984/18/36/S10
UR  - https://juser.fz-juelich.de/record/861362
ER  -