Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 12, Issue 3, Pages 865-876Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200500676
Keywords
macrocycles; molecular devices; molecular switch; pseudorotaxanes
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Herein, we report the synthesis of a molecular clip with TTF sidewalls and its binding behavior towards electron-deficient guests, namely the formation of macrocycle/molecular-clip supramolecular complexes in solution. Four different sets of external stimuli-the K+/[2.2.2]cryptand, NH4+/Et3N and (p-BrPh)(3)NSbCl6/Zn pairs, and heating/cooling cycles-control the movement of this molecular switch between its threaded and unthreaded states and provide color changes that are observable by the naked eye. This macrocycle/molecular-clip complex system can be considered not only as a quadruple-use molecular switch, but can also be operated by three of these stimuli as a three-input molecular NOR-functioning logic gate that may be monitored by UV-visible spectroscopy.
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