Stimuli-responsive supramolecular dye inclusion complex constructed by self-assembly of inverted cucurbit[7]uril and thioflavin T

ABSTRACT

A novel 1:1 supramolecular dye inclusion complex between inverted cucurbit[7]uril (iQ[7]) and Thioflavin T (THT) has been successfully constructed on the basis of host–guest recognition. The obtained results revealed that THT exhibited obvious iQ[7]-induced fluorescence enhancement in this inclusion complex system, and the N-dimethyl and benzene ring moiety of the guest THT were located inside the cavity of iQ[7], whereas the other section of THT remained outside the portal. And THT@iQ[7] was highly stimuli-responsive to competing guests. These results provided a possibility for application in the molecular recognition area.

Graphical Abstract

KEYWORDS:

• Inverted cucurbit[7]uril
• host–guest interaction
• thioflavin T
• supramolecular dye complex
• stimuli-responsive

Disclosure statement

No potential conflict of interest was reported by the author(s).

Supplementary material

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Additional information

Funding

This work was supported by the Natural Science Foundation of Shandong Province (Grant numbers: ZR2021QB178, ZR2021QB197), Shandong University of Science and Technology Research Fund (Grant numbers: skr20-3-023, skr20-3-040).