Dimension-Controllable and Photo-Responsive Supramolecular Organic Framworks through Cucurbit[8]uril-based Self-Assembly |
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| Authors: | Jie Wang You Li Zi-juan Hai Yang-yang Yan Zan Hua Zhong-kai Wang Guang Yang |
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| Affiliation: | a.Biomass Molecular Engineering Center, School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, Chinab.Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, Chinac.The State Key Laboratory of Molecular Engineering of Polymers (Fudan University), Shanghai 200433, China |
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| Abstract: | Dimension-controllable supramolecular organic frameworks (SOFs) with aggregation-enhanced fluorescence are hierarchically fabricated through the host-guest interactions of cucurbit[8]uril (CB[8]) and coumarin-modified tetraphenylethylene derivatives (TPEC). The three-dimensional layered SOFs could be constructed from the further stacking of two-dimensional mono-layered structures via simply regulating the self-assembly conditions including the culturing time and concentration. Upon light irradiation under the wavelength of 365 nm, the photodimerization of coumarin moieties occurred, which resulted in the transformation of the resultant TPECbegin{document}$ _n $end{document}/CB[8]begin{document}$ _{4n} $end{document} two-dimensional SOFs into robust covalently-connected 2D polymers with molecular thickness. Interestingly, the supramolecular system of TPECbegin{document}$ _n $end{document}/CB[8]begin{document}$ _{4n} $end{document} exhibited intriguing multicolor fluorescence emission from yellow to blue in the time range of 0begin{document}$ - $end{document}24 h at 365 nm irradiation, possessing potential applicability for photochromic fluorescence ink. |
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| Keywords: | Supramolecular organic framework Host-guest interaction Dimension-controllability Tunable fluorescence Photo-responsiveness |
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