Influence of structural and chemical modification of silica on its surface hydration

Abstract

It was shown that an unusual structural type of water, which is weakly associated and unfrozen up to 180 K and possessing a proton resonance chemical shift at 1.5 ppm, appears at the patch-wise hydrophilic/ hydrophobic interfaces of adsorbents placed in non-polar or weak solvents. Such water can amount to 10 wt% in amount.