A light-responsive molecular switch based on cucurbit[7]uril and 1,1'-bis(benzyl)-4-[2-(4-pyridyl)-vinyl]-pyridinium dibromide displaying white light emission

By using H NMR, ESI-MS and UV spectra, a novel light-responsive molecular switch constructed using 1,1'-bis(benzyl)-4-[2-(4-pyridyl)-vinyl]-pyridinium (1 ) and cucurbit[7]uril (Q[7]) is demonstrated. The - to -isomerization of the double bond in 1 results in the transition of the switching stat...

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Bibliographic Details
Published in:Organic & biomolecular chemistry 2022-02, Vol.20 (6), p.1253-1259
Main Authors: Wang, Qin, Zhang, Kun, Lin, Rui-Lian, Sun, Wen-Qi, Ye, Ming-Fu, Xiao, Xin, Liu, Jing-Xin
Format: Article
Language:English
Subjects:
Fluorescence
Isomerization
Light emission
Molecular machines
NMR
Nuclear magnetic resonance
Pyridinium
Ultraviolet radiation
White light
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Summary:By using H NMR, ESI-MS and UV spectra, a novel light-responsive molecular switch constructed using 1,1'-bis(benzyl)-4-[2-(4-pyridyl)-vinyl]-pyridinium (1 ) and cucurbit[7]uril (Q[7]) is demonstrated. The - to -isomerization of the double bond in 1 results in the transition of the switching states from the 1 : 2 complex -1 @Q[7] to the stable 1 : 1 complex -1 @Q[7]. In particular, both the 1 : 2 complex and the 1 : 1 complex can emit cold white fluorescence under UV light.
ISSN:1477-0520
1477-0539
DOI:10.1039/d1ob02420e