Filme molekularer Bewegungen und Reaktionen: Einzelmolekültransmissionselektronenmikroskopie in Echtzeit

Nakamura, Eiichi

doi:10.1002/ange.201205693

Cited by 4 publications

(2 citation statements)

References 33 publications

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“…[22] An image of MINT pp -1 obtained under a JEOL-JEM 2100F microscope (2.5 resolution), like the microscope utilized by Nakamura and co-workers in their seminal study, [23] is shown in Figure 6 c. Most of the individual SWNTs show densely covered walls (Figure 6 c, white ellipse), in agreement with the high degree of functionalization determined by TGA, but we were pleased to observe that in numerous cases distinct circular objects could be detected around the nanotubes, in several different areas of the sample (Figure 6 c, white circles). Pioneering studies by Nakamura and co-workers have offered extensive evidence of the observation of a variety of small organic molecules under TEM in the vicinity of carbon nanotubes.…”

Section: Methodsmentioning

confidence: 99%

Mechanically Interlocked Single‐Wall Carbon Nanotubes

Juan

Pouillon²,

Ruiz‐González

et al. 2014

Angew Chem Int Ed

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Extensive research has been devoted to the chemical manipulation of carbon nanotubes. The attachment of molecular fragments through covalent-bond formation produces kinetically stable products, but implies the saturation of some of the C-C double bonds of the nanotubes. Supramolecular modification maintains the structure of the SWNTs but yields labile species. Herein, we present a strategy for the synthesis of mechanically interlocked derivatives of SWNTs (MINTs). In the key rotaxane-forming step, we employed macrocycle precursors equipped with two π-extended tetrathiafulvalene SWNT recognition units and terminated with bisalkenes that were closed around the nanotubes through ring-closing metathesis (RCM). The mechanically interlocked nature of the derivatives was probed by analytical, spectroscopic, and microscopic techniques, as well as by appropriate control experiments. Individual macrocycles were observed by HR STEM to circumscribe the nanotubes.

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Section: Methodsmentioning

confidence: 99%

Mechanically Interlocked Single‐Wall Carbon Nanotubes

Juan

Pouillon²,

Ruiz‐González

et al. 2014

Angew Chem Int Ed

View full text Add to dashboard Cite

show abstract

“…Pioneering studies by Nakamura and co-workers have offered extensive evidence of the observation of a variety of small organic molecules under TEM in the vicinity of carbon nanotubes. [22] An image of MINT pp -1 obtained under a JEOL-JEM 2100F microscope (2.5 resolution), like the microscope utilized by Nakamura and co-workers in their seminal study, [23] is shown in Figure 6 c. Most of the individual SWNTs show densely covered walls (Figure 6 c, white ellipse), in agreement with the high degree of functionalization determined by TGA, but we were pleased to observe that in numerous cases distinct circular objects could be detected around the nanotubes, in several different areas of the sample (Figure 6 c, white circles). The diameter of the nanotubes (ca.…”

Section: Methodsmentioning

confidence: 99%

Mechanically Interlocked Single‐Wall Carbon Nanotubes

Juan

Pouillon²,

Ruiz‐González

et al. 2014

Angewandte Chemie

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Extensive research has been devoted to the chemical manipulation of carbon nanotubes. The attachment of molecular fragments through covalent-bond formation produces kinetically stable products, but implies the saturation of some of the CÀC double bonds of the nanotubes. Supramolecular modification maintains the structure of the SWNTs but yields labile species. Herein, we present a strategy for the synthesis of mechanically interlocked derivatives of SWNTs (MINTs). In the key rotaxane-forming step, we employed macrocycle precursors equipped with two p-extended tetrathiafulvalene SWNT recognition units and terminated with bisalkenes that were closed around the nanotubes through ring-closing metathesis (RCM). The mechanically interlocked nature of the derivatives was probed by analytical, spectroscopic, and microscopic techniques, as well as by appropriate control experiments. Individual macrocycles were observed by HR STEM to circumscribe the nanotubes.

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Putting Rings around Carbon Nanotubes

Pérez

2017

Chemistry A European J

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In the last five years, we have developed synthetic methods towards encapsulation of single-walled carbon nanotubes (SWNTs) into organic macrocycles, to form rotaxane-type molecules. These are the first examples of mechanically interlocked SWNT derivatives (MINTs). In this article, the motivation to continue developing the chemistry of SWNTs at a time well past their hype is discussed and our synthetic strategy and characterization methodology is explained in detail, stressing the general aspects. In particular, special emphasis is placed on the importance of adequate control experiments and bulk spectroscopic and analytical data to determine the structure of SWNT derivatives, as opposed to relying only (or mostly) on microscopy. Also our experimental results are used as pretext to reflect on more general/conceptual issues pertaining to the chemistry of SWNTs and mechanically interlocked molecules.

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Filme molekularer Bewegungen und Reaktionen: Einzelmolekültransmissionselektronenmikroskopie in Echtzeit

Cited by 4 publications

References 33 publications

Mechanically Interlocked Single‐Wall Carbon Nanotubes

Mechanically Interlocked Single‐Wall Carbon Nanotubes

Mechanically Interlocked Single‐Wall Carbon Nanotubes

Putting Rings around Carbon Nanotubes

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