Structural and Physical Properties of Hydrogen and Fluoro Decorated Triazine Channel Inclusions

ABSTRACT

With the advantage of a channel diameter of about 12 Å; for phenoxy-substituted triazines, fullerenes were included into the channels of 2,4,6-tris(4-bromophenoxy)-1,3,5-triazine (BrPOT). Preliminary investigations on photoconductivity of the inclusion crystals showed results probably related to the predominance of host-guest interplay rather than guest-guest interactions. To reverse this balance, a modification of the channel wall was attempted by perfluorination of the phenoxy substituted triazine. However, the fluoro derivative of BrPOT formed no inclusion compounds with typical solvents, whereas 2,4,6-tris(pentafluorophenoxy)-1,3,5-triazine (F5POT) showed channel inclusion formation with p-xylene and p-chlorotoluene (host-guest ratio 2:1). Reversibility of solvent uptake for the F5POT/p-xylene system is demonstrated.

Keywords:

• channel inclusion
• fullerene
• perfluoro compounds
• triazine

Acknowledgments

We grateful acknowledge support by the Swiss National Science Foundation, NFP 47, project 4047-057476/1. Thanks to Tino Hertzsch for photoconductivity measurements.