Distinct dynamic behaviors of water molecules in hydrated pores |
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Authors: | Febles Martín Pérez-Hernandez Natalia Pérez Cirilo Rodríguez Matías L Foces-Foces Concepción Roux María Victoria Morales Ezequiel Q Buntkowsky Gerd Limbach Hans-Heinrich Martín Julio D |
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Affiliation: | Instituto de Bioorganica, Universidad de La Laguna, CSIC, Ctra. Vieja de La Esperanza 2, 38206 La Laguna, Tenerife, Spain. |
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Abstract: | Water molecules confined inside narrow pores are of great importance in understanding the structure, stability, and function of water channels. Here we report that besides the H-bonding water that structures the pore, the permanent presence of a significant, fast-moving fraction of incompletely H-bonded water molecules inside the pore should control the free entry and exit of water. This is achieved by means of complementary DSC and solid-state NMR studies. We also present compelling evidence from X-ray diffraction data that the cluster formed by six water molecules in the most stable cage-like structure is sufficiently hydrophobic to be stably adsorbed in a nonpolar environment. |
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