Département de chimie moléculaire

Viologen-centered electron transfer was used to trigger a complete dissocn. of a porphyrin-based coordination polymer. In the oxidized state, self-assembly is induced by iterative assocn. of individual porphyrin-based tectons. Dissocn. of the self-assembled species is actuated upon changing the redox state of the bipyridinium units involved in the tectons from their dicationic state to their radical cation state, the driving force of the disassembling process being the formation of an intramolecularly locked conformation partly stabilized by $π$-dimerization of both viologen cation radicals. [on SciFinder(R)]