One-Dimensional Silicon Chain Architecture: Molecular Dot, Rope, Octopus, and Toroid

Furukawa, Katsuko; Ebata, Keisuke; Fujiki, Michiya

doi:10.1002/1521-4095(200007)12:14<1033::aid-adma1033>3.0.co;2-f

Cited by 39 publications

(43 citation statements)

References 2 publications

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“…More recently, Furukawa, Ebata and coworkers obtained a similar AFM molecular image of 7 whose end termini had been chemically immobilized on a solid substrate, along with other flexible, optically inactive polysilylenes. [73,80] …”

Section: Imaging Of Rod-like Polysilylene Single Moleculeseeing Is Bementioning

confidence: 99%

Optically Active Polysilylenes: State-of-the-Art Chiroptical Polymers

Fujiki

2001

Macromol. Rapid Commun.

271

204

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Section: Imaging Of Rod-like Polysilylene Single Moleculeseeing Is Bementioning

confidence: 99%

Optically Active Polysilylenes: State-of-the-Art Chiroptical Polymers

Fujiki

2001

Macromol. Rapid Commun.

271

204

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“…AFM has been frequently used for the visualization of polymer materials, although the resolution is poor in comparison with that of STM. In current research, the visualization of single biological polymer molecules such as DNA,74, 75 polypeptides,76–78 and polysaccharides79–81 has been reported, but SPM observations of synthetic helical polymers still remain rare 82–89. Shinohara et al90 reported high‐resolution STM imaging of the single helix and intertwined double helix of a poly(phenylacetylene) bearing an L ‐menthoxycarbamoyl group adsorbed onto highly oriented pyrolytic graphite.…”

Section: Introductionmentioning

confidence: 99%

“…In current research, the visualization of single biological polymer molecules such as DNA, 74,75 polypeptides, 76 -78 and polysaccharides 79 -81 has been reported, but SPM observations of synthetic helical polymers still remain rare. [82][83][84][85][86][87][88][89] Shinohara et al 90 reported high-resolution STM imaging of the single helix and intertwined double helix of a poly(phenylacetylene) bearing an L-menthoxycarbamoyl group adsorbed onto highly oriented pyrolytic graphite. Li and coworkers 91,92 used AFM to observe the morphology of an L-valine-containing poly(phenylacetylene) moderated by a pH change.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and property of helical poly(phenylacetylene)s bearing chiral ruthenium complexes and real space imaging of meso‐ and nanoscopic structures by atomic force microscopy

Sakurai

Ohira

Fujito

et al. 2004

J. Polym. Sci. A Polym. Chem.

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Novel sets of helical poly(phenylacetylene)s bearing a chiral ruthenium (Ru) complex with opposite chirality (Δ and Λ forms) as a bulky pendant (poly‐1 and poly‐2) were synthesized through the polymerization of the corresponding optically pure phenylacetylenes with a rhodium catalyst, and their structures in solution and morphology on solid substrates were investigated with NMR, ultraviolet–visible, and circular dichroism (CD) spectroscopies and with atomic force microscopy (AFM), respectively. The obtained cis–transoidal polymers (poly‐1 and poly‐2) showed characteristic Cotton effects in the region of metal‐to‐ligand charge transfer of the chiral Ru pendants. Poly‐1 and poly‐2 were thought to have a predominantly one‐handed helical conformation induced by the chiral pendants. However, the apparent Cotton effects derived from the helically twisted π‐conjugated polymer backbone could not be observed, probably because of the strong chiral chromophoric pendants. However, in the AFM images, the helical polymers adsorbed on mica could be easily discerned as isolated strands, and the visualization and discrimination of the right‐ and left‐handed helical structures of the chiral polymers were achieved by high‐resolution AFM imaging. On the basis of the AFM observations together with the CD measurements and computational calculation results, possible structures of poly‐1 and poly‐2 were examined. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 4621–4640, 2004

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“…[5][6][7][8] There has been at least one experiment on the kind of system we are interested in, 11 but it is not clear to what extent the conditions agree with ours and to what extent nonequilibrium effects are important in the experiment.…”

Section: Resultsmentioning

confidence: 80%

End-Tethered Polymer Chains under a Membrane with Stickers: Blister and Surface Micelle Formation

Kim

Williams

2010

Macromolecules

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A system of end-grafted polymer chains in a good solvent is compressed under a membrane with freely moving stickers which favor the membrane sticking to the surface. For large enough degree of polymerization the membrane is predicted to form blisters, each confining multiple chains extending to form a surface micelle. Multiple chains compressed under a single bump or a blister reduce the free energies due to volume exclusion of the chains and the curvature of the membrane, at the expense of chain stretching energy.

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One-Dimensional Silicon Chain Architecture: Molecular Dot, Rope, Octopus, and Toroid

Cited by 39 publications

References 2 publications

Optically Active Polysilylenes: State-of-the-Art Chiroptical Polymers

Optically Active Polysilylenes: State-of-the-Art Chiroptical Polymers

Synthesis and property of helical poly(phenylacetylene)s bearing chiral ruthenium complexes and real space imaging of meso‐ and nanoscopic structures by atomic force microscopy

End-Tethered Polymer Chains under a Membrane with Stickers: Blister and Surface Micelle Formation

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