Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing State Key Laboratory of Organic-Inorganic Composites, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
College of Engineering, Peking University, Beijing 100871, China.
Chem Commun (Camb). 2023 Jun 8;59(47):7236-7239. doi: 10.1039/d3cc01900d.
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) 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.
可控聚合物机械变色具有很大的应用潜力。我们通过三步合成设计了一种新型 ESIPT 机械力敏基团（HBIA-2OH）。与聚氨酯相连，它表现出独特的光门控机械变色，源于激发态分子内质子转移（ESIPT）的光诱导形成和力诱导的分子内氢键断裂。作为对照，HBIA@PU 对光/力没有响应。因此，HBIA-2OH 是一种罕见的机械力敏基团，具有光门控机械变色性能。
