Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 53, Issue 17, Pages 4442-4449Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201309680
Keywords
electron transport; mechanically interlocked molecules; radical anions; self-assembly; template-directed synthesis
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Funding
- Joint Center of Excellence in Integrated Nano-Systems (JCIN) at King Abdul-Aziz City for Science and Technology (KACST) [34-947]
- Chemical Sciences, Geosciences, and Biosciences Division, Office of Basic Energy, DOE [DE-FG02-99ER-14999]
- National Science Foundation (NSF) [DGE-0824162]
- Department of Defense through the National Defense Science & Engineering Graduate Fellowship (NDSEG) Program
- International Institute for Nanotechnology (IIN) at NU
- QUEST high-performance computing center at NU
- ANSER Center, an Energy Frontier Research Center
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001059]
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The controlled self-assembly of well-defined and spatially ordered -systems has attracted considerable interest because of their potential applications in organic electronics. An important contemporary pursuit relates to the investigation of charge transport across noncovalently coupled components in a stepwise fashion. Dynamic oligorotaxanes, prepared by template-directed methods, provide a scaffold for directing the construction of monodisperse one-dimensional assemblies in which the functional units communicate electronically through-space by way of -orbital interactions. Reported herein is a series of oligorotaxanes containing one, two, three and four naphthalene diimide (NDI) redox-active units, which have been shown by cyclic voltammetry, and by EPR and ENDOR spectroscopies, to share electrons across the NDI stacks. Thermally driven motions between the neighboring NDI units in the oligorotaxanes influence the passage of electrons through the NDI stacks in a manner reminiscent of the conformationally gated charge transfer observed in DNA.
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