Synthesis and Single-Molecule Imaging of Highly Mobile Adamantane-Wheeled Nanocars

The synthesis and single-molecule imaging of two inherently fluorescent nanocars equipped with adamantane wheels is reported. The nanocars were imaged using 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) as the chromophore, which was rigidly incorporated into the nanocar chassis via Sonogashira...

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Bibliographic Details
Published in:ACS nano 2013-01, Vol.7 (1), p.35-41
Main Authors: Chu, Pin-Lei E, Wang, Lin-Yung, Khatua, Saumyakanti, Kolomeisky, Anatoly B, Link, Stephan, Tour, James M
Format: Article
Language:English
Subjects:
Adamantane - chemistry
Chassis
Computer Simulation
Constants
Diffusion
Energy Transfer
Fluorescence
Imaging
Materials Testing
Models, Chemical
Models, Molecular
Motion
Nanoparticles - chemistry
Nanoparticles - ultrastructure
Nanostructure
Nanostructures - chemistry
Nanostructures - ultrastructure
Particle Size
Rolling motion
Synthesis
Wheels
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Summary:The synthesis and single-molecule imaging of two inherently fluorescent nanocars equipped with adamantane wheels is reported. The nanocars were imaged using 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY) as the chromophore, which was rigidly incorporated into the nanocar chassis via Sonogashira cross-coupling chemistry that permitted the synthesis of nanocars having different geometries. In particular, studied here were four- and three-wheeled nanocars with adamantane wheels. It was found that, for the four-wheeled nanocar, the percentage of moving nanocars and the diffusion constant show a significant improvement over p-carborane-wheeled nanocars with the same chassis. The three-wheeled nanocar showed only limited mobility due to its geometry. These results are consistent with a requisite wheel-like rolling motion. We furthermore developed a model that relates the percentage of moving nanocars in single-molecule experiments with the diffusion constant. The excellent agreement between the model and the new results presented here as well as previous single-molecule studies of fluorescent nanocars yields an improved understanding of motion in these molecular machines.
ISSN:1936-0851
1936-086X
DOI:10.1021/nn304584a