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• W2895557119 abstract "Abstract A series of alternate copolymers D‑co‑Ts named P(DPP‑TA) P(DPP‑Cz) and P(DPP‑DB) consisting of both diketopyrrolopyrrole (DPP) and different triarylamine (TAA) units, were synthesized by Stille cross-coupling reaction in which DPP acts as an acceptor and TAA acts as a donor. These D‑co‑Ts show good thermal stability in nitrogen (N2) atmosphere. The solutions of D‑co‑Ts have strong UV–vis absorption bands in the range of 313 nm to 344 nm and have fluorescence (PL) peaks at from 415 nm to 496 nm with high quantum efficiency. The highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO) energy levels and Eg were combined with via cyclic voltammograms (CV) as −5.19 eV to −5.41 eV, −3.77 eV to −3.80 eV, and 1.42 eV to 1.62 eV, respectively. The P(DPP‑TA) film shows the evident color changes from original yellow to brownish to blue. New absorption peaks of P(DPP‑TA) appear at 412 nm and 938 nm with increasing voltage in the UV–vis spectrophotometer, indicating D‑co‑Ts can be promising electrochromic materials. The highest coloration efficiency reaches up to be 270 cm2 C−1 for the P(DPP‑Cz). The memory performances of the ITO/polymer/Al sandwich devices were also studied, in which D‑co‑Ts exhibit the typical nonvolatile rewritable flash memory characteristics. The device of P(DPP‑DB) shows an ON/OFF current ratio of 5.80 × 104 under a threshold voltage of −1.80 V. Furthermore, in the explosive detection tests, the copolymer shows new emission band at 570 nm with addition of TNT, and the PL quenching efficiency goes up to be 82%." @default.
• W2895557119 created "2018-10-12" @default.
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• W2895557119 date "2018-11-01" @default.
• W2895557119 modified "2023-10-17" @default.
• W2895557119 title "Synthesis and optoelectronic properties of novel alternate copolymers based on diketopyrrolopyrrole and triarylamine units spaced by flexible chain" @default.
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• W2895557119 doi "https://doi.org/10.1016/j.jelechem.2018.10.008" @default.
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