Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 4, Issue 7, Pages 1188-1192Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz400360v
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- Italian Ministry of Education, University and Research (MIUR)
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Biological interfaces characterized by a complex mixture of hydrophobic, hydrophilic, or charged moieties interfere with the cooperative rearrangement of the hydrogen-bond network of water. In the present study, this solute-induced dynamical perturbation is investigated by extended frequency range depolarized light scattering experiments on an aqueous solution of a variety of systems of different nature and complexity such as small hydrophobic and hydrophilic molecules, amino acids, dipeptides, and proteins. Our results suggest that a reductionist approach is not adequate to describe the rearrangement of hydration water because a significant increase of the dynamical retardation and extension of the perturbation occurs when increasing the chemical complexity of the solute.
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