Electrochromic/electrofluorochromic poly(urea-urethane) bearing oligoaniline and tetraphenylethylene groups: Synthesis, characterization, and H2O2 visualized determination. (October 2021)

• Record Type: Journal Article
• Authors: Zhang, Yingchao; Xie, Yunfei; Zhou, Mingjuan; Berda, Erik B.; Chao, Danming
• Is Part Of: Dyes and pigments. Volume 194(2021)
• Publication Date: 2021-10
• Subjects: AIE -- Oligoaniline -- Electroactive -- Electrochromic -- Electrofluorochromic; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2021.109594
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: The elegant electroswitchable color/emission properties of electrochromic/electrofluorochromic dual-functional materials motivates the exploration of their new applications. In this work, a new poly (urea-urethane) was synthesized via nucleophilic copolymerization of electroactive oligoaniline derivative, solid-emissive tetraphenylethylene groups, and alkyl isocyanate. The resultant poly (urea-urethane) exhibited good electroactivity and desirable aggregation-induced emission properties. High-performance electrochromic/electrofluorochromic behavior had been disclosed with a high optical contrast ratio of ΔT = 50.4%, a moderate fluorescence on/off ratio of 10.5, and high coloration efficiency of 503 cm 2 /C at 768 nm. A reflective/emissive dual-mode display device had also been manufactured based on the resultant poly (urea-urethane) and charge-balancing V2 O5, exhibiting a reversible color change and tunable fluorescence conversion upon the electric stimulus. Furthermore, this polymer showed an interesting color/fluorescence response to H2 O2, due to the linkage mechanism between its redox states and optical properties. The spray-coated poly (urea-urethane) test strips were employed in visualized dual-determination of H2 O2 with gradual color change from gray to dark green, along with an obvious fluorescence change from light blue to dark, which displays easy operation and rapid detection. Graphical abstract: This work reports the synthesis of an electrochromic/electrofluorochromic poly (urea-urethane) bearing AIE-active groups and electroactive oligoaniline segments, which shows great potentials in reflective/emissive dual-mode display and colorimetric/fluorometric dual-determination of H2 O2 . Image 1 Highlights: A new poly (urea-urethane) (PUU) bearing AIE and oligoaniline groups was synthesized. PUU displays electrochromic/electrofluorochromic dual-functional performance. A reflective/emissive dual-mode display device was fabricated based on PUU and V2 O5 . Spray-coated PUU test strips were employed in visualized dual-determination of H2 O2 .