Smart Hybrid Materials (SHMs)
Khashab Research Group
Innovatively Functionalized Nanomaterials for Biomedical, Sensing and Composites Applications

Publication-19

A Tristable [2]Pseudo[2]Rotaxane

Trabolsi, A.; Fahrenbach, A. C.; Dey, S. K.; Share, A. I.; Friedman, D. C.; Basu, S.; Gasa, T. B.; Khashab, N. M.; Saha, S.; Aprahamian, I.; Khatib, H. A.; Flood, A. H.; Stoddart, J. F. A Tristable [2]Pseudo[2]Rotaxane. Chem. Commun. 2010, 46, 871-873
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Trabolsi, A.; Fahrenbach, A. C.; Dey, S. K.; Share, A. I.; Friedman, D. C.; Basu, S.; Gasa, T. B.; Khashab, N. M.; Saha, S.; Aprahamian, I.; Khatib, H. A.; Flood, A. H.; Stoddart, J. F.
Tristable, [2]pseudo[2]rotaxane
2010

A strategy towards increasing the lifetime of the metastable state of a [2]rotaxane incorporating tetrathiafulvalene, 1,5-dioxynaphthalene and bipyridinium (BIPY2+) is presented. Incorporation of BIPY2+ served multiple roles as an electrostatic barrier to relaxation, a supramolecular recognition site for bis-1,5-dioxynaphthalene[38]crown-10 macrocycle, and upon reduction a recognition site for the mechanically bonded cyclobis(paraquat-p-phenylene) ring.