Self-assembled organic tubular host for van der Waals guest inclusion

The square channels of 2,4,6-tris(2-chloro-3-pyridinoxy)-1,3,5-triazine ( similar to 4 angstrom) sustained by C-H center dot center dot center dot N and Cl center dot center dot center dot Cl/Cl center dot center dot center dot N interactions tightly encapsulate small molecules in an aromatic enclosure, show reversible guest exchange, and the voids are stable up to 50% evacuation.