Synthesis, reactivity, and sulfide quenching of helical viologens

Abstract

GRAPHICAL ABSTRACT ABSTRACT The first examples of chiral helical viologens are reported. These novel compounds have sufficiently long singlet lifetimes to support bimolecular photochemical reactions. They are quenched with diffusion-controlled rates with dialkyl-, diaryl-, and alkyl-aryl sulfides presumably by a charge transfer/electron transfer mechanism.