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- Title
Host–Guest Recognition and Fluorescence of a Tetraphenylethene‐Based Octacationic Cage.
- Authors
Duan, Honghong; Li, Yawen; Li, Qingfang; Wang, Pinpin; Liu, Xueru; Cheng, Lin; Yu, Yang; Cao, Liping
- Abstract
We report the synthesis and characterization of a three‐dimensional tetraphenylethene‐based octacationic cage that shows host–guest recognition of polycyclic aromatic hydrocarbons (e.g. coronene) in organic media and water‐soluble dyes (e.g. sulforhodamine 101) in aqueous media through CH⋅⋅⋅π, π–π, and/or electrostatic interactions. The cage⊃coronene exhibits a cuboid internal cavity with a size of approximately 17.2×11.0×6.96 Å3 and a "hamburger"‐type host–guest complex, which is hierarchically stacked into 1D nanotubes and a 3D supramolecular framework. The free cage possesses a similar cavity in the crystalline state. Furthermore, a host–guest complex formed between the octacationic cage and sulforhodamine 101 had a higher absolute quantum yield (ΦF=28.5 %), larger excitation–emission gap (Δλex‐em=211 nm), and longer emission lifetime (τ=7.0 ns) as compared to the guest (ΦF=10.5 %; Δλex‐em=11 nm; τ=4.9 ns), and purer emission (ΔλFWHM=38 nm) as compared to the host (ΔλFWHM=111 nm).
- Subjects
CUCURBITURIL; POLYCYCLIC aromatic hydrocarbons; FLUORESCENCE; ELECTROSTATIC interaction
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 25, p10187
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201912730