该文开发了一种近红外(NIR)机械磷光体,并将其并入聚(丙烯酸甲酯)链中,以展示聚合物材料中的第一种力诱导近红外色度。这种基于苯并[1,3]恶嗪(OX)与七甲川菁部分融合的机械色体在溶液、薄膜和体状态下表现出近红外机械色性。使用UV–vis–NIR吸收/荧光光谱、凝胶渗透色谱(GPC)、NMR和DFT模拟验证了机械力化学活性。
研究表明,近红外力致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。
附:英文原文
Title: Force-Induced Near-Infrared Chromism of Mechanophore-Linked Polymers
Author: Qingkai Qi, Gaganjot Sekhon, Richard Chandradat, Nnamdi M. Ofodum, Tianruo Shen, Jan Scrimgeour, Monu Joy, Mario Wriedt, Madhuri Jayathirtha, Costel C. Darie, Devon A. Shipp, Xiaogang Liu, Xiaocun Lu
Issue&Volume: September 29, 2021
Abstract: 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.
DOI: 10.1021/jacs.1c05923
Source: https://pubs.acs.org/doi/10.1021/jacs.1c05923
JACS:《美国化学会志》,创刊于1879年。隶属于美国化学会,最新IF:14.612
官方网址:https://pubs.acs.org/journal/jacsat
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