Orthogonal switching of self-sorting processes in a stimuli-responsive library of cucurbit[8]uril complexes

Abstract

The self-sorting processes in dynamic libraries of cucurbit[8]uril complexes can be switched in an orthogonal way by external stimuli. Protonated phenylpyridine guests form a 2 : 1 homoternary π-donor–π-acceptor complex, while deprotonation makes it a partner for ethylviologen in a 1 : 1 : 1 heteroternary complex. Reduction of the viologen instead generates a 2 : 1 homoternary complex of viologen radical-cations.