“…Levitation effect is an universal diffusion phenomena seen in all condensed matter phases, namely, in nanoporous materials, [22][23][24] in close packed lattices, [25,26] in liquids, [27,28] etc. The effect refers to an anomalous increase seen in the diffusivity with increase in the molecular diameter when the diameter is comparable to the bottleneck diameter, the narrowest diameter in the pore network through which the guest has to pass through during diffusion.…”