Journal
CHEMICAL SCIENCE
Volume 10, Issue 19, Pages 5104-5113Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9sc00913b
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Funding
- Natural Sciences and Engineering Research Council of Canada [101694]
- European Research Council [692981]
- European Research Council (ERC) [692981] Funding Source: European Research Council (ERC)
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Rigid, Y-shaped imidazole compounds containing the bis(thienyl) ethene moiety were designed and synthesized. The 4,5-bis(benzothienyl)-2-phenylimidazolium cations were then used as axles for [2] pseudorotaxane formation with 24-membered crown ether wheels. It was demonstrated using 1H NMR spectroscopy, UV-Vis absorption and emission spectroscopies that this host-guest interaction results in significant changes in the photochromic properties of the imidazolium axles. This is a rare example of gated photochromism, which exploits the recognition event of an interpenetrated molecular system to tune the photochromic properties in one of the components.
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