Distinct dynamic behaviors of water molecules in hydrated pores.
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.
Febles
Martín
M
Instituto de Bioorganica, Universidad de La Laguna, CSIC, Ctra. Vieja de La Esperanza 2, 38206 La Laguna, Tenerife, Spain.
Pérez-Hernandez
Natalia
N
Pérez
Cirilo
C
Rodríguez
Matías L
ML
Foces-Foces
Concepción
C
Roux
María Victoria
MV
Morales
Ezequiel Q
EQ
Buntkowsky
Gerd
G
Limbach
Hans-Heinrich
HH
Martín
Julio D
JD
D018360:Crystallography, X-Ray; D014867:Water / Q000737:chemistry*
D014867:Water