Photo-gated polymer mechanochromism from excited-state intramolecular proton transfer,Chemical Communications

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Photo-gated polymer mechanochromism from excited-state intramolecular proton transfer
Chemical Communications ( IF 4.3 ) Pub Date : 2023-05-17 , DOI: 10.1039/d3cc01900d
Xin Cheng ₁ , Huan Hu ₁ , Yu Wu ₁ , Zhimin Ma ₂ , Zhiyong Ma ₁

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Controlled polymer mechanochromism has large potential for new applications. We design a novel ESIPT mechanophore (HBIA-2OH) by three-step synthesis. Connected to polyurethane, it shows unique photo-gated mechanochromism from excited-state intramolecular proton transfer (ESIPT) via photo-induced formation and force-induced breaking of the intramolecular hydrogen bonds. As a control, HBIA@PU experiences no response to photo/force. Thus, HBIA-2OH is a rare mechanophore featuring photo-gated mechanochromism.

中文翻译：

来自激发态分子内质子转移的光门控聚合物机械致色

可控聚合物机械致色具有巨大的新应用潜力。我们通过三步合成设计了一种新型 ESIPT 机械载体 (HBIA-2OH)。连接到聚氨酯，它通过光诱导形成和力诱导分子内氢键断裂，显示出来自激发态分子内质子转移 (ESIPT) 的独特光门控机械变色。作为对照，HBIA@PU 对照片/力没有反应。因此，HBIA-2OH 是一种罕见的具有光门控机械致色作用的机械基团。

更新日期：2023-05-17

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