Figure 42.

a)Three pyrazoles are brought together in each layer to form triple hydrogen bonds. b) Electron‐rich pyrazole accumulates with the electron‐poor tetrafluorobenzene ring. Consequently, a hexagonal network is obtained, and an infinitely long fluorine‐lined channel runs through the whole structure along the C‐axis c) of the crystal. d) Gas adsorption in compound 1 crystals. Crystals of compound 1 absorb N₂, O₂ and CO₂, but not absorb H₂O vapor, even at 90% relative humidity. e) Time function. Reproduced with permission.^{[ 130 ]} Copyright 2014, Nature Publishing Group.