Switching Surface Chemistry with Supramolecular Machines
Langmuir2006Vol. 23(1), pp. 31–34
Citations Over TimeTop 10% of 2006 papers
Bruce C. Bunker, Dale L. Huber, James G. Kushmerick, Timothy D. Dunbar, Michael J. Kelly, Carolyn M. Matzke, Jianguo Cao, Jan O. Jeppesen, Julie Perkins, Amar H. Flood, J. Fraser Stoddart
Abstract
Tethered supramolecular machines represent a new class of active self-assembled monolayers in which molecular configurations can be reversibly programmed using electrochemical stimuli. We are using these machines to address the chemistry of substrate surfaces for integrated microfluidic systems. Interactions between the tethered tetracationic cyclophane host cyclobis(paraquat-p-phenylene) and dissolved pi-electron-rich guest molecules, such as tetrathiafulvalene, have been reversibly switched by oxidative electrochemistry. The results demonstrate that surface-bound supramolecular machines can be programmed to adsorb or release appropriately designed solution species for manipulating surface chemistry.
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