一种智能单荧光团聚合物:自组装形状变色多色荧光和可擦墨墨水

IF 27.4 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Advanced Materials Pub Date : 2023-09-24 DOI:10.1002/adma.202307971
Ying-Yi Ren, Bo-Yi Deng, Zi-Hao Liao, Zi-Rong Zhou, Chen-Ho Tung, Li-Zhu Wu, Feng Wang
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引用次数: 0

摘要

通过在分子水平上加入四种刺激触发剂,研制出一种新型智能荧光聚合物聚亚胺接枝芘(PGP)。触发点包括两亲性、超分子主客体位点、芘荧光指示剂和可逆螯合位点。PGP表现出智能变形和形状依赖荧光响应外部刺激。它可以变形成三种典型的形状,即蓝绿色荧光的球形核壳胶束,黄色荧光的标准矩形纳米片和深蓝色荧光的不规则分支。前两种形状之间的准可逆变形可以动态操纵。此外,在可逆配位和由此产生的分子内光诱导电子转移的驱动下,PGP可以用作具有可擦除和可恢复性能的水性荧光墨水。PGP油墨印刷在纸上的荧光图案可以通过简单的Cu2+和乙二胺四乙酸水溶液的顺序喷涂来快速擦除和恢复。这种擦除/恢复转换可以在同一张纸上重复多次。PGP的多刺激响应性使其在纳米机器人、传感、信息加密和防伪等方面具有潜在的应用前景。
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A Smart Single-Fluorophore Polymer: Self-Assembly Shapechromic Multicolor Fluorescence and Erasable Ink

A novel smart fluorescent polymer polyethyleneimine-grafted pyrene (PGP) is developed by incorporating four stimuli-triggers at molecular level. The triggers are amphiphilicity, supramolecular host–guest sites, pyrene fluorescence indicator, and reversible chelation sites. PGP exhibits smart deformation and shape-dependent fluorescence in response to external stimuli. It can deform into three typical shapes with a characteristic fluorescence color, namely, spherical core–shell micelles of cyan-green fluorescence, standard rectangular nanosheets of yellow fluorescence, and irregular branches of deep-blue fluorescence. A quasi-reversible deformation between the first two shapes can be dynamically manipulated. Moreover, driven by reversible coordination and the resulting intramolecular photoinduced electron transfer, PGP can be used as an aqueous fluorescence ink with erasable and recoverable properties. The fluorescent patterns printed by PGP ink on paper can be rapidly erased and recovered by simple spraying a sequence of Cu2+ and ethylene diamine tetraacetic acid aqueous solutions. This erase/recover transformation can be repeated multiple times on the same paper. The multiple stimulus responsiveness of PGP makes it have potential applications in nanorobots, sensing, information encryption, and anticounterfeiting.

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来源期刊
Advanced Materials
Advanced Materials 工程技术-材料科学:综合
CiteScore
43.00
自引率
4.10%
发文量
2182
审稿时长
2 months
期刊介绍: Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.
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