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- W2041777078 abstract "The hydration structures and dynamics of phenol in aqueous solution at infinite dilution are investigated using molecular-dynamics simulation technique. The simulations are performed at several temperatures along the coexistence curve of water up to the critical point, and above the critical point with density fixed at 0.3g∕cm3. The hydration structures of phenol are characterized using the radial, cylindrical, and spatial distribution functions. In particular, full spatial maps of local atomic (solvent) density around a solute molecule are presented. It is demonstrated that in addition to normal H bonds with hydroxyl group of phenol, water forms π-type complexes with the center of the benzene ring, in which H2O molecules act as H-bond donor. At ambient conditions phenol is solvated by 38 water molecules, which make up a large hydrophobic cavity, and forms on average 2.39 H bonds (1.55 of which are due to the hydroxyl group-water interactions and 0.84 are due to the π complex) with its hydration shell. As temperature increases, the hydration structure of phenol undergoes significant changes. The disappearance of the π-type H bonding is observed near the critical point. Self-diffusion coefficients of water and phenol are also calculated. Dramatic increase in the diffusivity of phenol in aqueous solution is observed near the critical point of simple point-charge-extended water and is related to the changes in water structure at these conditions." @default.
- W2041777078 created "2016-06-24" @default.
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- W2041777078 date "2006-01-11" @default.
- W2041777078 modified "2023-10-16" @default.
- W2041777078 title "Spatial hydration structures and dynamics of phenol in sub- and supercritical water" @default.
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- W2041777078 doi "https://doi.org/10.1063/1.2145751" @default.
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