Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 29, Pages 9984-9985Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja103912a
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Funding
- Skaggs Institute for Research
- Alexander von Humboldt Stiftung
- Swiss National Science Foundation (SNF)
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The trans to cis isomerization of 4,4'-dimethylazobenzene by the nonchemical stimuli light and heat alters its guest binding properties, allowing control over encapsulation of a second guest. We show here how this remote control for reversible encapsulation can be used as a supramolecular fluorescence on/off switch. If trans-4-ethyl-4'-methylstilbene is used as the second guest its fluorescence is altered depending on whether it is free in solution or encapsulated. We demonstrate that the change in fluorescence is indeed a consequence of the controlled encapsulation state of the stilbene by correlation of fluorescence and H-1 NMR data.
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