Abstract
Abstract Two naphthalene (NP) and bipyridinium (BIPY 2+ ) alternately incorporated polymers P1 and P2 have been prepared through the formation of dynamic hydrazone bonds. The polymers formed NP–BIPY 2+ donor–acceptor interaction-induced pleated secondary structure. Upon reducing the BIPY 2+ units to radical cation BIPY + , intramolecular dimerization of the BIPY + units induced the backbones to afford another pleated secondary structure. Adding electron-rich macrocyclic polyether bis-1,5-dinaphtho[38]crown-10 or electron-deficient cyclobis(paraquat- p -phenylene) cyclophane did not break the first foldamer by complexing the BIPY 2+ or NP units of the polymers, whereas the di(radical cationic) ring of the second cyclophane could break the second foldamer by forming threading complexes with the BIPY + units of the polymers.
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