Modulation of <scp>stimuli‐responsiveness</scp> toward acid vapor between <scp>real‐time</scp> and <scp>write‐erase</scp> responses based on conjugated polymers containing azobenzene and Schiff base moieties

We developed three types of film-type stimuli-responsive polymers based on aza-substituted conjugated involving azobenzene, N_bith, N_fluo and Schiff base moieties, C_bith. All polymer films showed bathochromic shifts in absorption spectra followed by chromic behaviors fuming trifluoroacetic acid (TFA). In particular, we disclosed that there were significant differences detecting ability between azobenzene derivatives terms wavelengths, stability, proton holding time. The exhibited real-time responses toward vapor fuming, meanwhile write erase reversibly accomplished with the exposing to amine vapor. Theoretical calculation revealed red-shifted bands should be induced protonation nitrogen atoms positions. Diverse through dynamic regulation electronic properties main-chain conjugation can introducing aza-substituents polymers.