Organic channel inclusion compound featuring an open pore size of 12Â Ã

A first example of a purely organic material showing an open pore size of 12 Å for empty channels was obtained for micrometer sized crystals of 2,4,6-tris-(4-bromophenoxy)-1,3,5-triazine (BrPOT). The zeolitic-like form of the known inclusion compound was formed by a solid to solid transformation from micrometer large particles of the rhombohedral modification of BrPOT taking up gaseous CS2. Long-term thermal stability of the empty channel structure was found up to about 60 °C. Functionalisation of the pore volume by including aromatic amines allowed sorption of molecular iodine. It is proposed that micrometer sized channel inclusion crystals are a promising entry to produce open pore modifications, which in the case of large crystallites are known to collapse into the solvent-free structure by the process of desolvation.