4.8 Article

Force-Induced Near-Infrared Chromism of Mechanophore-Linked Polymers

期刊

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 143, 期 42, 页码 17337-17343

出版社

AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c05923

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资金

  1. Clarkson University
  2. A*STAR under its AME Program [A2083c0051]
  3. Ministry of Education, Singapore [MOE-MOET2EP10120-0007]
  4. National Science Foundation [1925596, DMR 1847786]
  5. Office of Information Technology
  6. ACRES cluster
  7. Office of Advanced Cyberinfrastructure (OAC)
  8. Direct For Computer & Info Scie & Enginr [1925596] Funding Source: National Science Foundation

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A near-infrared mechanophore was incorporated into a polymeric chain to demonstrate force-induced NIR chromism. The mechanophore exhibited NIR mechanochromism in solution, thin-film, and bulk states, with potential applications in mechanical force sensing, damage detection, bioimaging, and biomechanics.
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.

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