Synthesis and characterization of an electrochromic copolymer based on 2,2-5-2-terthiophene and 3,4-ethylenedioxythiophene

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• 作者：Mohammad Shamsuddin Ahmed (1)
  Haesang Jeong (1)
  Jung-Min You (1)
  Seungwon Jeon (1) swjeon3380@naver.com
• 关键词：Electrochemical polymerization – Conducting polymer – Terthiophene – Ethylenedioxythiophene – Cyclic voltammetry – Electrochromism
• 刊名：Applied Nanoscience
• 出版年：2012
• 出版时间：June 2012
• 年：2012
• 卷：2
• 期：2
• 页码：133-141
• 全文大小：822.8 KB
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• 作者单位：1. Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju, 500-757 Korea
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Nanotechnology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：2190-5517

文摘

A new electrochromic copolymer of 2,2′:5′,2″-terthiophene (TT) with 3,4-ethylenedioxythiophene (EDOT) was synthesized in 0.1 M tetrabutylammonium perchlorate as supporting electrolyte and characterizations of the resulting copolymer P(TT-co-EDOT) performed by cyclic voltammetry, UV–vis spectroscopy, scanning electron microscopy, fourier transform infrared spectroscopy, nuclear magnetic resonance and thermal analysis. Spectroelectrochemical investigations showed that the copolymer film has electrochromic properties. It showed five different colors at various potentials (sky blue, gray, light purple, blues violet and dark blues violet). Double potential step chronoamperometry experiment illustrated that copolymer film had good stability, fast switching time and high optical contrast. At the neutral state of the copolymer λ_max was found at 500 nm and E _g was calculated as 1.63 eV. The copolymer film showed a maximum optical contrast of 54% at 1,100 nm with a short response time.