Fig. 12.

a Chemical structures of three polyamides. b Schematic diagram of electrofluorochromic (EFC) devices based on the polyamides. c Behaviors of EFC devices based on TPA-CN-CH (top), TPA-CN-TPE (middle), and TPA-OMe-TPE (bottom) with a specific applied voltage for oxidation. d Estimation of the fluorescence switching time at different step cycle times of TPA-CN-CH/n-heptyl viologen between 1.4 V and −1.5 V. Reproduced from [87] with permission from the Royal Society of Chemistry. e Chemical structure of TPE-TPA-CH. f Fluorescence spectra of TPE-TPA-CH film at different applied potentials. g Fluorescence switching response under applied potentials between 0.0 and 0.6 V at the cycling time of 20 s for 300 cycles. Reproduced from [86] with permission from the American Chemical Society