We have designed and prepared a new dual stimuli-responsive guest molecule containing a spiropyran fragment and a pyridinium moiety. Acid addition or UV-light irradiation induces guest transformation to a merocyanine isomer, promoting the threading motion through a 24-crown-8 macrocycle and the formation of a [2]pseudorotaxane complex.
D. Hernández-Melo and J. Tiburcio, Chem. Commun., 2015, 51, 17564 DOI: 10.1039/C5CC07056B
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