Conformational Study of Poly(<i>N</i>-propargylamides) Having Bulky Pendant Groups

Tabei, Junichi; Nomura, Ryoji; Masuda, Toshio

doi:10.1021/ma020320y

Cited by 125 publications

(106 citation statements)

References 17 publications

(43 reference statements)

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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: 96%

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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Section: Helical Structurementioning

confidence: 96%

Substituted polyacetylenes

Masuda

2006

J. Polym. Sci. A Polym. Chem.

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392

222

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“…It has been reported that the helical structure of poly(N-propargylamide)s is stabilized by the intramolecular hydrogen bonds between the pendant amide groups. [17] In polar solvents such as DMSO and water, therefore, the hydrogen bonds are readily broken to effect destabilization of the helical structure. The helical conformation of 6 in polar solvents is probably stabilized by the bulky substituents in the side chains of sugar and lauryloyl groups.…”

Section: Secondary Conformation Ofmentioning

confidence: 99%

Amphiphilic Poly(N‐propargylamide) with Galactose and Lauryloyl Groups: Synthesis and Properties

Suenaga¹,

Kaneko²,

Kadokawa³

et al. 2006

Macromolecular Bioscience

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An amphiphilic poly(N-propargylamide) with galactose and lauryloyl groups was synthesized by copolymerization of the corresponding N-propargylamide monomers using a Rh catalyst. The obtained copolymer formed a one-handed helical conformation and molecular aggregates in water. The observations by fluorescence microscopy in a cell culture experiment in the presence of dye-labeled copolymer indicated that the copolymer was incorporated into the cells.

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“…[21] Other monomers were synthesized according to the methods introduced earlier (monomer 1, ref. [22] ; monomer 2, ref. [22] ; and monomer 3, ref.…”

Section: Experimental Part Materialsmentioning

confidence: 99%

Preparation of Optically Active Nanoparticles by Emulsification of Preformed Helical Polymers

Zhang

Luo

Deng

et al. 2010

Macro Chemistry & Physics

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The preparation of nanoparticles consisting of chiral helical substituted polyacetylenes via emulsification of the preformed polymers is reported. Two types of helically substituted acetylenes were examined as model polymers: two chiral poly(N‐propargylamide)s and two achiral poly(N‐propargylamide)s. The four polymers were emulsified with SDS as emulsifier to form nanoparticles. The particle size can be modulated by varying the SDS concentration. A comparison between nanoparticle emulsion and the corresponding polymer solution demonstrated obvious blue shifts in the CD spectra of nanoparticle emulsions made from helical polymers with relatively not‐so‐bulky pendent groups, for which the possible mechanism was proposed. magnified image

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Conformational Study of Poly(N-propargylamides) Having Bulky Pendant Groups

Cited by 125 publications

References 17 publications

Substituted polyacetylenes

Substituted polyacetylenes

Amphiphilic Poly(N‐propargylamide) with Galactose and Lauryloyl Groups: Synthesis and Properties

Preparation of Optically Active Nanoparticles by Emulsification of Preformed Helical Polymers

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