Fig. 2
From: Water-mediated NOE: a promising tool for interrogating interfacial clay–xenobiotic interactions
An illustration of the interaction between pesticides and water on clay surface. In this case, we have two different types of water molecules with different dynamics. Due to the oxygen-rich surface, the clay surface is covered with water due to hydrogen bonding. The clay–bound water exhibits correlation time that is significantly lower compared to that of free water, leading to a different sign in their NOE. If the pesticide is in contact with the water molecules, magnetization from the water will be transferred to the pesticides via NOE