Switching surface chemistry with supramolecular machines.

Journal Article · Fri Jul 01 00:00:00 EDT 2005 · Proposed for publication in Nanoletters.

OSTI ID:972485

Dunbar, Timothy D; Kelly, Michael James; Jeppesen, Jan O ^[1]; Bunker, Bruce Conrad; Matzke, Carolyn M; Stoddart, J Fraser; Huber, Dale L; Kushmerick, James G; Flood, Amar H ^[1]; Perkins, Julie ^[1]; Cao, Jianguo ^[1]

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1. University of California, Los Angeles, CA

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.

• Research Organization: Sandia National Laboratories
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 972485
• Report Number(s): SAND2005-4270J
• Journal Information: Proposed for publication in Nanoletters., Journal Name: Proposed for publication in Nanoletters.
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
ELECTROCHEMISTRY
FLOWMETERS
MINIATURIZATION
OXIDATION
STIMULI
SUBSTRATES
SURFACE PROPERTIES
TETRATHIAFULVALENE