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Novel low color poly(ester imides) with triphenylamine and carbazole substituents for electrochromic applications
Liu, Yu; Liu, Lian; Ren, Baoyi; Zhu, Xiaoyu; Zhou, Weiyi; Li, Wenze
2019-03-01
Source PublicationDYES AND PIGMENTS
ISSN0143-7208
Volume162Pages:232-242
AbstractA series of novel poly(ester imides) (PEIs, individually denoted as Vila Vile) with triphenylamine and carbazole substituents were prepared herein by direct polymerization of 4, 4'-bis(trimellitimido)-4 ''-N-carbazolytriphenylamine (V) with various bisphenols (VIa-VIe). All of the PEIs exhibit good solubility in various organic solvents, high glass transition temperatures (To, 245-276 degrees C) and excellent thermal stability (with only 5% weight loss observed at 478-504 degrees C under nitrogen protection). The PEI-based films have excellent optical transparency 71-83%, 91-95%, and 94-97% at 450, 550, and 800 nm, and they are paler in color than poly (amine-imide) (PAD films in the neutral state while also exhibiting better optical transparency. Cyclic voltammetry measurements reveal that the films exhibit two reversible oxidation redox couples at 1.06-1.12 and 1.44-1.79 V under an anodic sweep. Oxidation of the PEI-VIIa film results in the formation of radical cations with outstanding stability, and yields excellent electrochromic properties. In particular, the color of this film changes from pale yellow in the neutral form to green and then to dark blue in the oxidized form. In addition, the anodic coloring of PEI-VIIa displays a high coloration efficiency (CE = 191 cm2/C), dramatic change in optical transmittance (AT = 82% at 760 nm) and long-term redox reversibility.
KeywordPoly(ester imides) Electrochromic materials Optical transparency Triphenylamine
Indexed BySCI
Language英语
WOS IDWOS:000456226500029
PublisherELSEVIER SCI LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81337
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Liu, Yu,Liu, Lian,Ren, Baoyi,et al. Novel low color poly(ester imides) with triphenylamine and carbazole substituents for electrochromic applications[J]. DYES AND PIGMENTS,2019,162:232-242.
APA Liu, Yu,Liu, Lian,Ren, Baoyi,Zhu, Xiaoyu,Zhou, Weiyi,&Li, Wenze.(2019).Novel low color poly(ester imides) with triphenylamine and carbazole substituents for electrochromic applications.DYES AND PIGMENTS,162,232-242.
MLA Liu, Yu,et al."Novel low color poly(ester imides) with triphenylamine and carbazole substituents for electrochromic applications".DYES AND PIGMENTS 162(2019):232-242.
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