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Chem. Commun., 2008, 2897 - 2899, DOI: 10.1039/b802728e

Stabilisation of a heptamethine cyanine dye by rotaxane encapsulation

C. M. Simon Yau, Sofia I. Pascu, Susan A. Odom, John E. Warren, Eric J. F. Klotz, Michael J. Frampton, Charlotte C. Williams, Veaceslav Coropceanu, Marina K. Kuimova, David Phillips, Stephen Barlow, Jean-Luc Brédas, Seth R. Marder, Val Millar and Harry L. Anderson

The crystal structure of a cyanine dye rotaxane shows that the cyclodextrin is tightly threaded round the polymethine bridge of the dye; encapsulation dramatically increases the kinetic chemical stability of the radicals formed on oxidation and reduction of the dye, making it possible to observe the rotaxane radical dication by ESR and UV-vis-NIR spectroscopy.

Graphical abstract image for this article (ID: b802728e)