Abstract
The states of water and salts in synthetic membranes have been discussed with attention to their structural and dynamical aspects.
The states and the mobilities of water under the influence of near-by polar and non-polar groups and ions are reviewed. Hydration of charged poly (amino acid) s as studied by a preferential solvation study is discussed. Diffusion of water and various solutes in synthetic membranes are reviewed from the viewpoint of dual mode diffusion. Change in the hydration of salts in membranes and its influence on their mobilities are discussed by referring to the studies on the permeation of salts in poly (vinyl alcohol) and crown-etherized poly (vinyl alcohol) membranes. A discussion follows on the discrimination of alkaline metal cations by poly (glutamate) in forming the helix conformation.
