Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 141, Issue 5, Pages 1898-1902Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.8b13310
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Funding
- KAKENHI grant from the Japan Society for the Promotion of Science (JSPS) [17H01205]
- Arnold and Mabel Beckman Foundation
- Office of Naval Research through the MUM on Photomechanical Material Systems [ONR N00014-18-1-2624]
- [16J07264]
- Grants-in-Aid for Scientific Research [17H01205] Funding Source: KAKEN
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The development of a multicolor mecha-nochromic polymer/silica composite is achieved by using two distinct types of mechanochromophores. The multicolor mechanochromism of the composite containing diarylbibenzofuranone in silica-rich domains and naphthopyran in the polymer-rich domain is observed. The obtained composite shows blue, green, and orange colors according to the intensity of applied mechanical stimuli, solvent addition, and lapse of time. This unique multicolor mechanochromic behavior is evaluated by solid-state UV vis absorption spectroscopy, ab initio steered molecular dynamics simulations, and computed minimum energy paths on force-modified potential energy surfaces. The unique mechanochromism is attributed to the difference in properties, activated colors, and domain locations between the two mechanochromophores.
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