Photoinduced Charge-Transfer Enables Dynamic Photochromism and Fluorochromism in Polymer Matrix

IF 8.6 1区化学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

ACS Materials Letters Pub Date : 2026-08-03 Epub Date: 2026-07-09 DOI:10.1021/acsmaterialslett.6c00512

Huakai Qiu, Zhixi Su, Wuzhen Luo, Xin Wang, Shunyou Cai, Feiming Li, Jingbin Zeng, Zhixiong Cai

{"title":"Photoinduced Charge-Transfer Enables Dynamic Photochromism and Fluorochromism in Polymer Matrix","authors":"Huakai Qiu, Zhixi Su, Wuzhen Luo, Xin Wang, Shunyou Cai, Feiming Li, Jingbin Zeng, Zhixiong Cai","doi":"10.1021/acsmaterialslett.6c00512","DOIUrl":null,"url":null,"abstract":"<p>Photo-stimuli-responsive luminescent materials are limited in application due to poor stability of their excited states. In donor-acceptor organic systems, photoinduced charge transfer and triplet-state dynamics are strongly governed by molecular interactions and environmental confinement, but their mechanistic regulation remains incompletely understood. Herein, we report a facile strategy to construct dynamic luminescent thin films by incorporating an electron acceptor and tertiary amine donors into a poly(methyl methacrylate) (PMMA) matrix. Photoinduced charge-transfer complexes (PCTCs) are generated in situ. The resulting modulation of charge-transfer and localized triplet states leads to prolonged excited-state lifetimes and distinct emission behaviors, exhibiting color-tunable emission spanning from blue fluorescence to green, yellow, and red, along with a visible orange-yellow afterglow persisting for 2 s. This work elucidates a matrix-assisted mechanism for regulating excited-state dynamics and provides general design principles for stable, high-contrast photoresponsive luminescent materials applicable to anti-counterfeiting and optical patterning.</p>","PeriodicalId":19,"journal":{"name":"ACS Materials Letters","volume":"8 8","pages":"2345–2353"},"PeriodicalIF":8.6000,"publicationDate":"2026-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACS Materials Letters","FirstCategoryId":"92","ListUrlMain":"https://pubs.acs.org/doi/10.1021/acsmaterialslett.6c00512","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2026/7/9 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

Abstract

Photo-stimuli-responsive luminescent materials are limited in application due to poor stability of their excited states. In donor-acceptor organic systems, photoinduced charge transfer and triplet-state dynamics are strongly governed by molecular interactions and environmental confinement, but their mechanistic regulation remains incompletely understood. Herein, we report a facile strategy to construct dynamic luminescent thin films by incorporating an electron acceptor and tertiary amine donors into a poly(methyl methacrylate) (PMMA) matrix. Photoinduced charge-transfer complexes (PCTCs) are generated in situ. The resulting modulation of charge-transfer and localized triplet states leads to prolonged excited-state lifetimes and distinct emission behaviors, exhibiting color-tunable emission spanning from blue fluorescence to green, yellow, and red, along with a visible orange-yellow afterglow persisting for 2 s. This work elucidates a matrix-assisted mechanism for regulating excited-state dynamics and provides general design principles for stable, high-contrast photoresponsive luminescent materials applicable to anti-counterfeiting and optical patterning.

查看原文本刊更多论文

光致电荷转移使聚合物基质中的动态光致变色和荧光致变色成为可能

光刺激响应发光材料由于其激发态稳定性差，限制了其应用。在供体-受体有机系统中，光诱导电荷转移和三重态动力学受到分子相互作用和环境约束的强烈控制，但其机制调控仍不完全清楚。在此，我们报告了一种简单的策略，通过将电子受体和叔胺给体结合到聚甲基丙烯酸甲酯（PMMA）基质中来构建动态发光薄膜。光致电荷转移配合物（PCTCs）在原位生成。由此产生的电荷转移和局域三重态的调制导致了激发态寿命的延长和不同的发射行为，表现出从蓝色荧光到绿色、黄色和红色的颜色可调的发射，以及持续2秒的可见橙黄色余辉。这项工作阐明了一种调节激发态动力学的矩阵辅助机制，并提供了适用于防伪和光学图案的稳定、高对比度光响应发光材料的一般设计原则。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Materials Letters MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

14.60

自引率

3.50%

发文量

261

期刊介绍： ACS Materials Letters is a journal that publishes high-quality and urgent papers at the forefront of fundamental and applied research in the field of materials science. It aims to bridge the gap between materials and other disciplines such as chemistry, engineering, and biology. The journal encourages multidisciplinary and innovative research that addresses global challenges. Papers submitted to ACS Materials Letters should clearly demonstrate the need for rapid disclosure of key results. The journal is interested in various areas including the design, synthesis, characterization, and evaluation of emerging materials, understanding the relationships between structure, property, and performance, as well as developing materials for applications in energy, environment, biomedical, electronics, and catalysis. The journal has a 2-year impact factor of 11.4 and is dedicated to publishing transformative materials research with fast processing times. The editors and staff of ACS Materials Letters actively participate in major scientific conferences and engage closely with readers and authors. The journal also maintains an active presence on social media to provide authors with greater visibility.