The trigonal arrangement of phosphazene molecules provides a hexagonal channel structure, wherein iodine forms molecular chains by in-diffusion and crystallization. The iodine chains show electrical conductivity.

This work was carried out by Tino Hertzsch in the group of Prof. Jürg Hulliger.

References:

• T. Hertzsch, F. Budde, E. Weber, J. Hulliger;
  "Supramolecular-Wire Confinement of I₂ Molecules in Channels of the Organic Zeolite Tris(o-phenylenedioxy)cyclotriphosphazene"
  Angew. Chem. Int. Ed., 41, 2281-2284, (2002);
  doi:10.1002/1521-3773(20020703)41:13<2281::AID-ANIE2281>3.0.CO;2-N.