Abstract
Total collapse: A porphyrinic [4]rotaxane collapses completely after demetalation. The metal-free compound does not act as a receptor whereas the copper(I)-complexed compound is a selective receptor for diamine and dipyridyl substrates (see picture). The recognition process can thus be switched on and off by complexing the free ligand to four CuI ions or demetalating the metal-complexed species, respectively. Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
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Collin, J. P., Durola, F., Heitz, V., Reviriego, F., Sauvage, J. P., & Trolez, Y. (2010). A cyclic [4]rotaxane that behaves as a switchable molecular receptor: Formation of a rigid scaffold from a collapsed structure by complexation with copper(I) ions. Angewandte Chemie - International Edition, 49(52), 10172–10175. https://doi.org/10.1002/anie.201004008
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