Fig. 2: Hydrogen bonding interactions between Co-3TPHAP, water, and each of the guests.
From: Atomic-resolution structure analysis inside an adaptable porous framework

The water molecules highlighted in purple were freely residing inside the pore, and cyan dash lines represent hydrogen bond contacts. Atom coloring scheme: C: white, N: blue, O: red, F: yellow-green, Cl: green, S: yellow, and Co: purple.