Biomimetic Stabilization of Helical Structure in a Synthetic Polymer by Means of Intramolecular Hydrogen Bonds

Nomura, Ryoji; Tabei, Junichi; Masuda, Toshio

doi:10.1021/ja015688+

Cited by 204 publications

(185 citation statements)

References 15 publications

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“…The presence of coordinative Si/F-C interactions was also confirmed by 19 F and 29 Si-NMR spectroscopy. 51 The 29 Si-NMR spectrum of 1 showed broad resonances centered at À33.2 ppm in toluene-d 8 due to the silicon catenated polymer backbone.…”

Section: A Coordinative Si/f-c Interactionmentioning

confidence: 69%

“…van der Waals interactions have been mainly exploited to achieve helical conformation in such polymers, however, only few examples for synthetic polymers have been reported in which a directional force such as the hydrogen bond plays a important role to attain the secondary structure. [28][29][30] Also, in some cases, chiral and strongly polar solute-solvent and solute-solute interactions are responsible for these helical assembled structures. 31,32 However, weak and/or invisible ultraweak intermolecular interactions of nonpolar systems have not been yet explored in synthetic helical structures.…”

Section: Michiya Fujiki 4638mentioning

confidence: 99%

Section: A Coordinative Si/f-c Interactionmentioning

confidence: 99%

“…51 The 29 Si-NMR spectrum of 1 showed broad resonances centered at À33.2 ppm in toluene-d 8 due to the silicon catenated polymer backbone. 29 Si-NMR spectrum showed a downfield chemical shift of 1.8 ppm in THFd 8 compared with that in toluene-d 8 . The concomitant up-field shift of 1.7 ppm was observed in the 19 F NMR spectrum in THF-d 8 (centered at À68.2 ppm) with respect to toluene-d 8 .…”

Section: A Coordinative Si/f-c Interactionmentioning

confidence: 99%

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Nonclassical forces: Seemingly insignificant but a powerful tool to control macromolecular structures

Fujiki

Saxena

2008

J. Polym. Sci. A Polym. Chem.

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Strong chemical forces such as covalent and ionic bonds are responsible for building discrete molecules, nature dwells on noncovalent forces weaker by three orders in magnitude, like the hydrophobic effect, hydrogen bonding, and van der Waals forces. Despite being weak, they possess the potential to drive spontaneous folding or unfolding of proteins and nucleic acids and the recognition between complimentary molecular surfaces. The power of these forces lies in the cooperativity with which they act, thereby generating a cumulative effect of many bonding interactions occurring together. Many ongoing research aims to translate the potential of these forces to the synthetic world to create desired structures with specific chemical functions. Achieving this offers unlimited opportunities for designing and synthesizing the most complex structures with specific applications. This highlight aims to reflect the critical role these noncovalent forces play in controlling macromolecular structures, which hold immense untapped potential for applications defying conventions, and briefly touches on the concept of homochirality in nature based on chiral and weak noncovalent interactions in synthetic nonpolar Si‐catenated polymers. It sheds some light on the discovery and characterization of Si/F‐C interactions in fluoroalkylated polysilanes in chemosensing of fluoride ions and nitroaromatics with a great sensitivity and selectivity. © 2008 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 46: 4637–4650, 2008

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Section: A Coordinative Si/f-c Interactionmentioning

confidence: 69%

Section: Michiya Fujiki 4638mentioning

confidence: 99%

Section: A Coordinative Si/f-c Interactionmentioning

confidence: 99%

Section: A Coordinative Si/f-c Interactionmentioning

confidence: 99%

See 2 more Smart Citations

Nonclassical forces: Seemingly insignificant but a powerful tool to control macromolecular structures

Fujiki

Saxena

2008

J. Polym. Sci. A Polym. Chem.

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“…94,95 The 1 H NMR spectra demonstrated that these polymers have cis-transoidal stereoregular structure. The intense CD effects and large optical rotations of the polymers in CHCl 3 indicated that they take helical conformation with one-handed screw sense.…”

Section: Helical Structurementioning

confidence: 95%

Substituted polyacetylenes

Masuda

2006

J. Polym. Sci. A Polym. Chem.

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392

222

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This article reviews the chemistry of substituted polyacetylenes developed by our research group, more specifically, development of polymerization catalyst, synthesis of new polymers, elucidation of their structure, investigation of their properties, and development of their functions. The main features are as follows: a number of catalysts based on group 5, 6, and 9 transition metals (Nb, Ta, Mo, W, and Rh) have been developed, which include living polymerization catalysts. By using these catalysts, many new substituted polyacetylenes have been synthesized, whose molecular weights are very high (Mw = 104−106). Most of the polymers are soluble in many common solvents and stable enough in the air unlike polyacetylene. Some of these polymers exhibit interesting functions including high gas permeability and photoelectronic properties. © 2006 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 45: 165–180, 2007

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An Overview of Polymer‐Immobilized Chiral Catalysts and Synthetic Chiral Polymers

Itsuno

2011

Polymeric Chiral Catalyst Design and Chiral Polymer Synthesis

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Biomimetic Stabilization of Helical Structure in a Synthetic Polymer by Means of Intramolecular Hydrogen Bonds

Cited by 204 publications

References 15 publications

Nonclassical forces: Seemingly insignificant but a powerful tool to control macromolecular structures

Nonclassical forces: Seemingly insignificant but a powerful tool to control macromolecular structures

Substituted polyacetylenes

An Overview of Polymer‐Immobilized Chiral Catalysts and Synthetic Chiral Polymers

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