Dithienothiophene‐Based Triphenylamine‐Containing Branched Copolymers for Electrochromic Applications. Issue 8 (24th June 2015)

• Record Type: Journal Article
• Authors: Cho, Ching Mui; Neo, Wei Teng; Ye, Qun; Lu, Xuehong; Xu, Jianwei
• Is Part Of: ChemPlusChem. Volume 80:Issue 8(2015:Aug.)
• Page Start: 1306
• Page End: 1311
• Publication Date: 2015-06-24
• Subjects: electrochromism -- heterocycles -- polymers -- structure–activity relationship -- synthesis design; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/cplu.201500192
• Languages: English
• ISSNs: 2192-6506

Abstract

Abstract: A series of dithienothiophene‐based electrochromic polymers are synthesized by a Stille coupling reaction of 2, 6‐bis(trimethylstannyl)dithieno[3, 2‐ b :2′, 3′‐ d ]thiophene, 2, 5‐dibromo‐3, 4‐bis(dodecyloxy)thiophene, and tris(4‐bromophenylamine). The resulting polymers have high molecular weights in the range of 59 200 to 81 300 g mol −1, and good solubility in common organic solvents. The polymer films are purple/red in neutral states and gradually become gray when oxidized to an intermediate state and blue when fully oxidized. Incorporation of triphenylamine into the polymer chains has resulted in a significant increase in the redox stability, which renders this a potential method to create high‐performance electrochromic polymers. Abstract : Broad‐spectrum results : A series of electrochromic dithienothiophene‐based branched copolymers with triphenylamine as a co‐monomer are described. Reversible multicolored optical changes are observed and depend on the triphenylamine content (see figure). The effect of triphenylamine on the electrochromic properties is also described.