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Interfacial Mechanophore Activation Using Laser-Induced Stress Waves

Sung, Jaeuk and Robb, Maxwell J. and White, Scott R. and Moore, Jeffrey S. and Sottos, Nancy R. (2018) Interfacial Mechanophore Activation Using Laser-Induced Stress Waves. Journal of the American Chemical Society, 140 (15). pp. 5000-5003. ISSN 0002-7863.

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A new methodology is developed to activate and characterize mechanochemical transformations at a solid interface. Maleimide–anthracene mechanophores covalently anchored at a fused silica–polymer interface are activated using laser-induced stress waves. Spallation-induced mechanophore activation is observed above a threshold activation stress of 149 MPa. The retro [4+2] cycloaddition reaction is confirmed by fluorescence microscopy, XPS, and ToF-SIMS measurements. Control experiments with specimens in which the mechanophore is not covalently attached to the polymer layer exhibit no activation. In contrast to activation in solution or bulk polymers, whereby a proportional increase in mechanophore activity is observed with applied stress, interfacial activation occurs collectively with spallation of the polymer film.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Robb, Maxwell J.0000-0002-0528-9857
White, Scott R.0000-0002-0831-9097
Sottos, Nancy R.0000-0002-5818-520X
Additional Information:© 2018 American Chemical Society. Received: February 5, 2018; Published: March 29, 2018. This work was supported in part by the National Science Foundation (Grant No. DMR 13-07354) and the Office of Naval Research (Grant No. 0014-12-1-0828). M.J.R. gratefully acknowledges the Arnold and Mabel Beckman Foundation for a Beckman Institute Postdoctoral Fellowship. The authors declare no competing financial interest.
Funding AgencyGrant Number
Office of Naval Research (ONR)0014-12-1-0828
Arnold and Mabel Beckman FoundationUNSPECIFIED
Caltech Beckman InstituteUNSPECIFIED
Issue or Number:15
Record Number:CaltechAUTHORS:20180329-111803719
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Official Citation:Interfacial Mechanophore Activation Using Laser-Induced Stress Waves. Jaeuk Sung, Maxwell J. Robb, Scott R. White, Jeffrey S. Moore, and Nancy R. Sottos. Journal of the American Chemical Society 2018 140 (15), 5000-5003. DOI: 10.1021/jacs.8b01427
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85496
Deposited By: Tony Diaz
Deposited On:29 Mar 2018 19:42
Last Modified:03 Oct 2019 19:31

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