Force-Induced Near-Infrared Chromism of Mechanophore-Linked Polymers,Journal of the American Chemical Society

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Force-Induced Near-Infrared Chromism of Mechanophore-Linked Polymers
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2021-09-29 , DOI: 10.1021/jacs.1c05923
Qingkai Qi , Gaganjot Sekhon , Richard Chandradat , Nnamdi M Ofodum , Tianruo Shen ₁ , Jan Scrimgeour , Monu Joy , Mario Wriedt , Madhuri Jayathirtha , Costel C Darie , Devon A Shipp , Xiaogang Liu ₁ , Xiaocun Lu

Affiliation

A near-infrared (NIR) mechanophore was developed and incorporated into a poly(methyl acrylate) chain to showcase the first force-induced NIR chromism in polymeric materials. This mechanophore, based on benzo[1,3]oxazine (OX) fused with a heptamethine cyanine moiety, exhibited NIR mechanochromism in solution, thin-film, and bulk states. The mechanochemical activity was validated using UV–vis–NIR absorption/fluorescence spectroscopies, gel permeation chromatography (GPC), NMR, and DFT simulations. Our work demonstrates that NIR mechanochromic polymers have considerable potential in mechanical force sensing, damage detection, bioimaging, and biomechanics.

中文翻译：

机械载体连接聚合物的力诱导近红外变色

开发了一种近红外 (NIR) 机械载体并将其整合到聚（丙烯酸甲酯）链中，以展示聚合物材料中第一个力诱导的 NIR 变色。这种基于苯并 [1,3] 恶嗪 (OX) 与七次甲基花青部分融合的机械载体，在溶液、薄膜和本体状态下表现出 NIR 机械变色。使用 UV-vis-NIR 吸收/荧光光谱、凝胶渗透色谱 (GPC)、NMR 和 DFT 模拟验证了机械化学活性。我们的工作表明，近红外机械变色聚合物在机械力传感、损伤检测、生物成像和生物力学方面具有相当大的潜力。

更新日期：2021-10-27

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