Enhancing Redox Stability and Electrochromic Performance of Polyhydrazides and Poly(1,3,4-oxadiazole)s with 3,6-Di-tert-butylcarbazol-9-yltriphenylamine Units
✍ Scribed by Sheng-Huei Hsiao; Hui-Min Wang; Wenjeng Guo; Chieh-Hsiang Sun
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 657 KB
- Volume
- 212
- Category
- Article
- ISSN
- 1022-1352
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✦ Synopsis
Abstract
New polyhydrazides and poly(amidehydrazide)s bearing redox‐active carbazole and triphenylamine units were prepared. The resulting poly(1,3,4‐oxdiazole)s and poly(amide‐1,3,4‐oxadiazole)s had high glass‐transition temperatures (288–330 °C) and high thermal stability. The dilute solutions of all the hydrazide and oxadiazole polymers showed a weak–medium photoluminescence with emission maxima around 474–506 nm. The polymer films revealed two well‐defined and reversible redox couples upon electrochemical oxidation, together with interesting electrochromic behaviors. They showed enhanced redox‐stability and electrochromic performance. CV of the oxadiazole polymers also showed reduction processes due to the formation of radical anions of the oxadiazole units. magnified image