Synthesis and electrochromic properties of 3,5-diphenyl-2,6-dithiophene-2-yldithieno[3,2-b;2鈥?3鈥?d]thiophene

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• 作者：Pinar Dundar^a ; Ipek Osken^a ; Onur Sahin^a ; Turan Ozturk^a ; ^b ; ^{ozturktur@itu.edu.tr}
• 关键词：Dithienothiophenes ; Electrochromic materials ; P4S10 ; Spectroelectrochemistry
• 刊名：Synthetic Metals
• 出版年：2012
• 期刊代码：77_03796779
• 类别：ph
• 出版时间：July, 2012
• 卷：162
• 期：11-12
• 页码：1010-1015
• 文件大小：618 K

摘要

A conducting polymer of 3,5-diphenyl-2,6-dithiophene-2-yl-dithieno[3,2-b;2鈥?3鈥?d]thiophene (Thy₂Ph₂DTT) was synthesized by potentiodynamic method in dichloromethane (DCM)/acetonitrile (AN) (1/1)-NaClO₄/LiClO₄ (0.1:0.1 M) solvent-electrolyte mixture. The resulting polymer was characterized via cyclic voltammetry (CV), Fourier transform infrared (FTIR) and UV-Vis spectroscopy. Its dual type electrochromic device (ECD) with PEDOT was constructed. Spectroelectrochemical and electrochromic properties of the polymer film and the device were investigated in detail. A potential range of 0.0-2.0 V was found to be suitable for operating the P(Thy₂Ph₂DTT)/PEDOT device between red and blue colors. The device displayed good open circuit memory and stability. Properties of Thy₂Ph₂DTT and P(Thy₂Ph₂DTT) were compared with 3,5-diphenyldithieno[3,2-b;2鈥?3鈥?d]thiophene (Ph₂DTT) and its polymer P(Ph₂DTT), reported previously, which revealed that introduction of thiophenes to the peripherals of Ph₂DTT improved the properties of the corresponding polymer.