Journal ArticleDOI
Radiation-induced Cis to Trans isomerization of poly(n-butylpropiolate) prepared with a [Rh(norbornadiene)Cl]2 complex as a stereospecific catalyst
TLDR
In this article, normal alkylpropiolate was polymerized with [Rh(norbornadiene)Cl] 2 catalyst in methanol solvent to produce poly( n -butylpropiolates), (PBPA) polymer called polyacetylene esters in relatively high yields.About:
This article is published in Radiation Physics and Chemistry.The article was published on 2002-01-01. It has received 15 citations till now. The article focuses on the topics: Norbornadiene & Isomerization.read more
Citations
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Controlled and Living Polymerizations Induced with Rhodium Catalysts. A Review
Jan Sedláček,Jiří Vohlídal +1 more
TL;DR: In the last fifteen years, a large variety of specialty polymers of diverse chemical structure and functionality have been synthesized with rhodium-based catalysts The high tolerance to the reaction medium and functional groups of monomers, as well as ability to control various structure features of the polymer formed are typical properties of these catalysts as mentioned in this paper.
Journal ArticleDOI
Irreversible helix rearrangement from Cis‐transoid to Cis‐cisoid in poly(p‐n‐hexyloxyphenylacetylene) induced by heat‐treatment in solid phase
Asahi Motoshige,Yasuteru Mawatari,Yoshiaki Yoshida,Chigusa Seki,Haruo Matsuyama,Masayoshi Tabata +5 more
TL;DR: In this paper, the authors used a [Rh(norbornadine)Cl]2-triethylamine catalyst to enable stereoregular helical poly(p-n-hexyloxyphenylacetylene)s (PpHPAs).
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Structural determination of stretched helix and contracted helix having yellow and red colors of poly(2-ethynylnaphthalene) prepared with a [Rh(norbornadiene)Cl]2-triethylamine catalyst
Yasuteru Mawatari,Asahi Motoshige,Yoshiaki Yoshida,Ranko Motoshige,Takahiro Sasaki,Masayoshi Tabata +5 more
TL;DR: In this paper, the authors investigated the helical and its crystal structures using wide angle X-ray scattering (WAXS), resonance laser Raman, and molecular mechanics calculation using MMFF94 force field.
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Emerging π-Conjugated Stretched and Contracted Helices and their Mutual Conversions of Substituted Polyacetylenes Prepared using an Organo-rhodium Catalyst
TL;DR: In this article, the authors have shown that polyacetylenes (SPA) can be prepared using a [Rh(norbornadiene)Cl]2-amine or alcohol catalyst along with the reason for why the Rh catalytic system was used.
Journal ArticleDOI
Remarkably Stretched Cis–Transoid Helices Generated in Solid Phase and Solution of Poly(carbazole acetylene) Prepared Using an Organorhodium Catalyst in Toluene
TL;DR: In this paper, a helical π-conjugated poly(N-isobutyl-3-carbazole acetylene), P(iBCzA), was stereoregularly prepared using an [Rh(norbornadine)Cl]2-triethylamine catalyst in toluene at 25 °C to determine the detailed geometrical and spatial structures in a tetrahydrofuran (THF) solution and the solid phase.
References
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Journal ArticleDOI
Precise synthesis of monosubstituted polyacetylenes using Rh complex catalysts. Control of solid structure and π‐conjugation length
TL;DR: In this article, the authors used a Rh complex, [Rh(norbornadiene)Cl] 2, as a catalyst, and the resulting polyacetylenes were characterized in detail by 1 H NMR, ESR, laser Raman, diffuse reflective UV, and wide-angle X-ray diffraction.
Journal ArticleDOI
Polymerization of m-chlorophenylacetylene initiated by (Rh(norbornadiene)Cl)2-triethylamine catalyst containing long-lived propagation species.
TL;DR: In this paper, the authors describe a polymerization of chlorophenylacetylene initiated by [Rh(norbornadiene)Cl] 2 -Triethylamine Catalyst Containing Long-Lived Propagation Species.
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Synthesis and Structure in Solution of Poly[(−)-menthyl propiolate] as a New Class of Helical Polyacetylene
TL;DR: The 1H NMR spectrum of the polymer formed with the Rh catalyst (PMtPr-Rh) showed a signal characteristic of the cis olefinic proton as discussed by the authors.
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1H-NMR and UV studies of Rh complexes as a stereoregular polymerization catalysts for phenylacetylenes : effects of ligands and solvents on its catalyst activity
TL;DR: The 1 H-NMR and UV study of the Rh complex showed that the activity of the rh catalysts greatly depends upon not only the ligand in the Rh catalyst but also on the solvent used, e.g., triethylamine (TEA) was used as solvent, whereas THF and benzene reduced the cis content as mentioned in this paper.
Journal ArticleDOI
Pressure-Induced Cis to Trans Isomerization of Poly((p-nitrophenyl)acetylene) Prepared Using Rh Complex Catalysts. Extension of π Conjugation Length
Rosaria D'Amato,Takeyuki Sone,Masayoshi Tabata,Yoshikazu Sadahiro,Maria Vittoria Russo,Anita Furlani +5 more
TL;DR: In this paper, a poly(p-nitrophenyl)acetylene (pNPA) with a cis−transoid form was obtained under mild conditions and the polymers were characterized using IR, CP MAS 13C NMR, ESR, and diffuse reflective UV methods.