Issue 16, 2015

Slow-to-fast transition of hydrogen bond dynamics in acetamide hydration shell formation

Abstract

The formation of a hydration shell in acetamide aqueous solution has been investigated by means of UV Raman spectroscopy. The experimental results reveal the existence of two distinct regimes of water dynamics. At high acetamide concentration water molecules show a structural and dynamical behavior consistent with the so-called iceberg model. Upon increasing the amount of water we observe the formation of a hydration shell marked by fastening of hydrogen-bond dynamics. Such a behavior may help to shed light on the scientific debate on how water rearranges around the hydrophobic portions of solute molecules (iceberg vs. non-iceberg models).

Graphical abstract: Slow-to-fast transition of hydrogen bond dynamics in acetamide hydration shell formation

Article information

Article type
Paper
Submitted
26 Jan 2015
Accepted
23 Mar 2015
First published
23 Mar 2015

Phys. Chem. Chem. Phys., 2015,17, 10987-10992

Author version available

Slow-to-fast transition of hydrogen bond dynamics in acetamide hydration shell formation

F. D'Amico, B. Rossi, G. Camisasca, F. Bencivenga, A. Gessini, E. Principi, R. Cucini and C. Masciovecchio, Phys. Chem. Chem. Phys., 2015, 17, 10987 DOI: 10.1039/C5CP00486A

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