Synthesis of donor-acceptor conjugated polymers containing indaceno[1,2-b:5,6-b’]dithiophene and benzothiadiazo-[3,4-g]-quinoxaline for electrochromism

IF 4.2 3区工程技术 Q2 CHEMISTRY, APPLIED

Dyes and Pigments Pub Date : 2025-09-02 DOI:10.1016/j.dyepig.2025.113210

Guoqiang Kuang , Yabing Wang , Mengxiong Zhu , Hongbin Yin , Yijie Tao , Yafei Guo , Shiguo Zhang

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引用次数: 0

Abstract

The synthesis of high-performance electrochromic polymers remains a key research highlight in the field of electrochromism. Herein, a series of donor-acceptor type conjugated polymers are synthesized based on 4,9-Dihydro-s-indaceno[1,2-b:5,6-b]dithiophene (IDT), 3,4-ethylenedioxythiophene (EDOT), benzo[c][1,2,5]thiadiazole (BTD) and benzothiadiazo-[3,4-g]-quinoxaline (TQX) units by Stille coupling polymerization. By fine-tuning the ratios between the monomers, the synthesized copolymers exhibited diverse color options and tunable properties, by applying an extra potential, polymer films transit from yellow, pink, green, and dark brown to highly transmissive state, along with outstanding electrochromic properties in both the NIR region and the visible region, such as high optical contrast, rapid switching response, and excellent stability. As a result, the derived electrochromic devices demonstrate an optical contrast exceeding 40 % and retained over 74 % of their optical contrast after 1000 switching cycles. These findings collectively demonstrate that these copolymers hold significant potential for applications in smart windows and adaptive camouflage as a versatile color palette.

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含吲哚[1,2-b:5,6-b ']二噻吩和苯并噻唑-[3,4-g]-喹啉的电致变色给受体共轭聚合物的合成

高性能电致变色聚合物的合成一直是电致变色领域的研究热点。本文以4,9-二氢-s-吲哚[1,2-b:5,6-b]二噻吩（IDT）、3,4-乙烯二氧噻吩（EDOT）、苯并[c][1,2,5]噻二唑（BTD）和苯并噻二氮-[3,4-g]-喹诺啉（TQX）为单体，采用Stille偶联聚合方法合成了一系列供体-受体型共轭聚合物。通过微调单体之间的比例，合成的共聚物具有多种颜色选择和可调节的性能，通过施加额外的电位，聚合物薄膜从黄色，粉红色，绿色和深棕色过渡到高透射状态，以及在近红外区和可见光区都具有出色的电致变色性能，例如高光学对比度，快速开关响应和出色的稳定性。结果，衍生的电致变色器件显示出超过40%的光学对比度，并在1000个开关循环后保持超过74%的光学对比度。这些发现共同表明，这些共聚物在智能窗户和自适应伪装方面具有巨大的应用潜力，可以作为一种通用的调色板。

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来源期刊

Dyes and Pigments 工程技术-材料科学：纺织

CiteScore

8.20

自引率

13.30%

发文量

933

审稿时长

33 days

期刊介绍： Dyes and Pigments covers the scientific and technical aspects of the chemistry and physics of dyes, pigments and their intermediates. Emphasis is placed on the properties of the colouring matters themselves rather than on their applications or the system in which they may be applied. Thus the journal accepts research and review papers on the synthesis of dyes, pigments and intermediates, their physical or chemical properties, e.g. spectroscopic, surface, solution or solid state characteristics, the physical aspects of their preparation, e.g. precipitation, nucleation and growth, crystal formation, liquid crystalline characteristics, their photochemical, ecological or biological properties and the relationship between colour and chemical constitution. However, papers are considered which deal with the more fundamental aspects of colourant application and of the interactions of colourants with substrates or media. The journal will interest a wide variety of workers in a range of disciplines whose work involves dyes, pigments and their intermediates, and provides a platform for investigators with common interests but diverse fields of activity such as cosmetics, reprographics, dye and pigment synthesis, medical research, polymers, etc.