Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 63: Focus Session: Charge Transport at Surfaces and Nanostructures with Multi-probe Techniques
O 63.13: Poster
Dienstag, 21. März 2017, 18:30–20:30, P2-OG3
A frame suspended into four Cucurbituril wheels: meet the Ohio Bobcat Nanowagon — •Eric Masson1 and Saw Wai Hla1,2 — 1Dept of Chemistry and Biochemistry and Dept of Physics and Astronomy, Ohio University, Athens, OH 45701, USA — 2Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL 60439 USA
We present the design, synthesis and characterization of the Ohio Bobcat Nanowagon, a [5]pseudorotaxane assembly bearing an H-shaped frame threaded into four Cucurbit[7]uril (CB[7]) wheels. The key motifs in the frame are two benzimidazolium groups, which link a terphenyl drive shaft (the horizontal bar of the "H" frame) to the axle shafts (the vertical bars of the "H" frame). Four pyridinium units terminate the latter. Positive charges at the pyridinium and benzimidazolium units allow the frame and the CB[7] wheels to assemble into the final nanowagon in water. The white solid obtained upon freeze-drying was used for STM analysis.