Synthesis and Single-Molecule Imaging of Highly Mobile Adamantane-Wheeled Nanocars
Synthesis and Single-Molecule Imaging of Highly Mobile Adamantane-Wheeled Nanocars
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DOI：
10.1021/nn304584a
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发表时间：
2013-01-01
期刊：
影响因子：
17.1
通讯作者：
Tour, James M.
中科院分区：
文献类型：
--
作者：
Chu, Pin-Lei E.;Wang, Lin-Yung;Tour, James M.
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.
