{"title":"Influence of Cross-Link Density on Electrochromic Properties of Conjugated Polymer","authors":"Shouli Ming, Zengshen Li, Ruiying Yi, Jinsheng Zhao*, Kaiwen Lin* and Hui Zhang*, ","doi":"10.1021/acsapm.4c00987","DOIUrl":null,"url":null,"abstract":"<p >Cross-linked conjugated polymers show many unique performance advantages in ionic transport, stretchability, and cycle stability. However, the relationship between cross-link density and performance is always ignored in designing cross-linked conjugated polymers. Here, a series of poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives with different cross-link densities were prepared by two steps: (1) free radical polymerization of flexible side chain (methacrylate); (2) electrochemical copolymerization of conjugated units (thiophene derivatives). These cross-linked conjugated copolymers except for poly(2,1) with high cross-link density exhibit a similar optical absorption region with a definite peak, indicating that low cross-link density has little influence on the absorption region. Electrochromic results indicate that poly(1,10) with low cross-link density possesses a higher optical contrast (70%) and faster response time (0.5 s) than linear poly(ProDOT-Me) and other cross-linked conjugated copolymers with relatively higher cross-link density. When cross-link density is beyond a critical value, it could be also found that the electrochromic properties of conjugated polymers decrease gradually as the cross-link density increases. And the flexible electrochromic device (10 cm × 6 cm) based on poly(1,10) was constructed, whose color could reversibly turn between purple and transmissive blue. These results demonstrate that controlling cross-link density is essential in designing cross-linked conjugated polymers as electrochromic materials.</p>","PeriodicalId":7,"journal":{"name":"ACS Applied Polymer Materials","volume":null,"pages":null},"PeriodicalIF":4.4000,"publicationDate":"2024-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Applied Polymer Materials","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsapm.4c00987","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Cross-linked conjugated polymers show many unique performance advantages in ionic transport, stretchability, and cycle stability. However, the relationship between cross-link density and performance is always ignored in designing cross-linked conjugated polymers. Here, a series of poly(3,4-ethylenedioxythiophene) (PEDOT) derivatives with different cross-link densities were prepared by two steps: (1) free radical polymerization of flexible side chain (methacrylate); (2) electrochemical copolymerization of conjugated units (thiophene derivatives). These cross-linked conjugated copolymers except for poly(2,1) with high cross-link density exhibit a similar optical absorption region with a definite peak, indicating that low cross-link density has little influence on the absorption region. Electrochromic results indicate that poly(1,10) with low cross-link density possesses a higher optical contrast (70%) and faster response time (0.5 s) than linear poly(ProDOT-Me) and other cross-linked conjugated copolymers with relatively higher cross-link density. When cross-link density is beyond a critical value, it could be also found that the electrochromic properties of conjugated polymers decrease gradually as the cross-link density increases. And the flexible electrochromic device (10 cm × 6 cm) based on poly(1,10) was constructed, whose color could reversibly turn between purple and transmissive blue. These results demonstrate that controlling cross-link density is essential in designing cross-linked conjugated polymers as electrochromic materials.
期刊介绍:
ACS Applied Polymer Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics, and biology relevant to applications of polymers.
The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrates fundamental knowledge in the areas of materials, engineering, physics, bioscience, polymer science and chemistry into important polymer applications. The journal is specifically interested in work that addresses relationships among structure, processing, morphology, chemistry, properties, and function as well as work that provide insights into mechanisms critical to the performance of the polymer for applications.