Fig. 8
From: Anion-adaptive crystalline cationic material for 99TcO4− trapping

Intermolecular interactions (isosurfaces: 0.005 a.u.) for different models using IGM analysis. a CB8-based host [H] and NO3−; b CB8-based host [H] and ReO4− (blue represents a strong attraction, and red denotes a strong repulsion). All isosurfaces are colored according to a BGR (blue-green-red) scheme over the electron density range −0.05 < sign(λ2)ρ < 0.05 a.u