An investigation of the complexation behaviour of structurally modified tetrathiafulvalene derivatives with the electron deficient cyclophane cyclobis(paraquat-p-phenylene)

This study has shown that easily oxidisable TTF units form charge-transfer (C-T) complexes with 7 which have the largest reported association constants to date. Replacing the sulfur of the TTF unit with selenium or extending the conjugated link between the two dithiole rings reduces the Ka of the complex relative to the parent derivative.