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

Publication-15

Redox-Driven Switching in Pseudorotaxanes

Trabolsi, A.; Hmadeh, M.; Khashab, N. M.; Friedman, D. C.; Belowich, M. E.; Humbert, N.; Elhabiri, M.; Khatib, H. A.; Albrecht-Gary, A.-M.; Stoddart, J. F. Redox-Driven Switching in Pseudorotaxanes. New J. Chem. 2009, 33, 254-263
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Trabolsi, A.; Hmadeh, M.; Khashab, N. M.; Friedman, D. C.; Belowich, M. E.; Humbert, N.; Elhabiri, M.; Khatib, H. A.; Albrecht-Gary, A.-M.; Stoddart, J. F.
Redox, switch, pseudorotaxane
2009
Two donor-acceptor thread-like compds. incorporating viologen (V2+) units and 1,5-dihydroxynaphthalene (DNP) stations have been prepd. Their ability to form self-assembled charge-transfer (CT) complexes with cucurbit[8]uril (CB[8]) is evidenced by UV-Vis and NMR spectroscopies, as well as by mass spectrometry. Binding studies show the formation of 1 : 1 and 2 : 1 complexes between CB[8] and a thread-like compd. contg. two viologen units, while only a 1 : 1 inclusion complex was obsd. between CB[8] and a thread-like compd. contg. only a single viologen unit. The switching behavior of the threads within their pseudorotaxane frameworks was investigated by using cyclic voltammetry (CV) and UV-Vis spectroscopy.