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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 BIPY2+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.
The polymers formed NP-BIPY ~ (2+) donor-acceptor interaction-induced pleated (BIPY ~ (2+)) alternately incorporated polymers P1 and P2 have been prepared through the formation of dynamic hydrazone bonds After 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 BIPY2 + 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.