TY - JOUR
T1 - Preferential solvation in mixed solvents. Part 8. Aqueous methanol from sub-ambient to elevated temperatures
AU - Marcus, Yizhak
PY - 1999/6/15
Y1 - 1999/6/15
N2 - The inversed Kirkwood-Buff integral method is applied to mixtures of water and methanol from - 13 to 250 °C. Preferential solvation is deduced from these integrals and shown over the entire composition and temperature ranges. The self-preference of water increases with rising temperatures in both water- and methanol-rich mixtures, reaching a limiting value near the critical point of methanol. At the equimolar composition, though, this self- preference reaches a shallow maximum near 150 °C. The methanol self- preference in methanol-rich mixtures is slight, but this hydrophobic effect is considerable at 15 mol% of methanol, reaching a pronounced maximum near 150 °C. The effect of the methanol on the structure of the water, the incorporation of water into the structure of methanol, and their changes with increasing temperatures are discussed.
AB - The inversed Kirkwood-Buff integral method is applied to mixtures of water and methanol from - 13 to 250 °C. Preferential solvation is deduced from these integrals and shown over the entire composition and temperature ranges. The self-preference of water increases with rising temperatures in both water- and methanol-rich mixtures, reaching a limiting value near the critical point of methanol. At the equimolar composition, though, this self- preference reaches a shallow maximum near 150 °C. The methanol self- preference in methanol-rich mixtures is slight, but this hydrophobic effect is considerable at 15 mol% of methanol, reaching a pronounced maximum near 150 °C. The effect of the methanol on the structure of the water, the incorporation of water into the structure of methanol, and their changes with increasing temperatures are discussed.
UR - http://www.scopus.com/inward/record.url?scp=0033564647&partnerID=8YFLogxK
U2 - 10.1039/a900459i
DO - 10.1039/a900459i
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AN - SCOPUS:0033564647
SN - 1463-9076
VL - 1
SP - 2975
EP - 2983
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 12
ER -