Polymerization of Phenylacetylenes. IX. Polymerization of β-Naphthylacetylene by WCl6 and MoCl5

Ohtori, Toshiyuki; Masuda, Toshio; Higashimura, Toshinobu

doi:10.1295/polymj.11.805

Cited by 27 publications

(6 citation statements)

References 10 publications

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“…Thus, the monomers in the present study polymerize in high yields with WCl 6 in conjunction with Ph 4 Sn or Ph 3 Bi as cocatalyst to give polymers with M w of ca. 2 ϫ 10 4 -6 ϫ 10 4 .…”

Section: Polymerizationmentioning

confidence: 79%

Synthesis and properties of widely conjugated polyacetylenes having anthryl and phenanthryl pendant groups

Musikabhumma

Masuda

1998

J. Polym. Sci. A Polym. Chem.

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The metathesis polymerization of 1‐ and 2‐ethynylanthracenes (1‐EA and 2‐EA) and 2‐ and 3‐ethynylphenanthrenes (2‐EP and 3‐EP) in the presence of various WCl6‐based catalysts produced widely conjugated soluble polymers with relatively high molecular weights. The highest weight‐average molecular weights of poly(1‐EA) and poly(2‐EA) reached 61,000 and 26,000, respectively, when Ph4Sn was used as cocatalyst, while those of poly(2‐EP) and poly(3‐EP) reached 23,000 and 65,000, respectively, with Ph3Bi as cocatalyst. In contrast, MoCl5‐based catalysts were hardly or not effective for these monomers. A large red‐shifted peak was observed centering at 570 nm (the cutoff at 750 nm) in the absorption spectrum of poly(1‐EA), while the red‐shifted peaks were seen around 500 nm (the cutoffs near 700 nm) in the spectra of other polymers, indicating wide conjugations of the polymer chains. The configurational structures of all the polymers confirmed by DSC and 1H‐NMR were trans structures. However, poly(1‐EA) and poly(3‐EP) appeared to consist partly of cis structures in their main chains. All of the present polymers showed relatively high thermal stability in air compared with poly(phenylacetylene). © 1998 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 36: 3131–3137, 1998

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“…Thus, the monomers in the present study polymerize in high yields with WCl 6 in conjunction with Ph 4 Sn or Ph 3 Bi as cocatalyst to give polymers with M w of ca. 2 ϫ 10 4 -6 ϫ 10 4 .…”

Section: Polymerizationmentioning

confidence: 79%

Synthesis and properties of widely conjugated polyacetylenes having anthryl and phenanthryl pendant groups

Musikabhumma

Masuda

1998

J. Polym. Sci. A Polym. Chem.

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“…1 1. 12 Figure I shows the time-conversion curves for the WC1 6 · Ph 4 Sn-catalyzed polymerization of phenylacetylene and its homologs. Compared with the polymerizations of phenylacetylene and /3-naphtylacetylene, three times as much catalyst was used for the polymerizations of 1-phenylpropyne and DPA.…”

Section: Experiments Almentioning

confidence: 99%

Polymerization of Phenylacetylenes. X. Polymerization of Diphenylacetylene by WCl6- and MoCl5-Based Catalysts

Masuda

Kawai

Ohtori

et al. 1979

Polym J

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ABSTRACT:The polymerization of diphenylacetylene was investigated. The reaction was performed at 0-90°C in aromatic and halogenated hydrocarbons. The catalysts used are a mixture ofWCl 6 and tetraphenyltin (W catalyst) and a mixture ofMoCl 5 , ethanol, and triethylaluminum (Mo catalyst). Polymerization smoothly proceeded by the W catalyst to give yellow insoluble poly-(diphenylacetylene) in high yield. The Mo catalyst also provided poly(diphenylacetylene), which is dark red and insoluble. The IR spectroscopy, differential thermal analysis, and X-ray diffraction showed that the former polymer was rich in trans structure and amorphous, and the latter rich in cis structure and crystalline. The electric conductivity and paramagnetic property of the polymer are also described.

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“…In contrast, the polymerization of monosubstituted acetylenes has been regarded as an ineffective route to widely conjugated acetylenic polymers because the coplanarity of the main chain is hindered by the steric hindrance between the substituents 4, 5. However, our recent studies on the polymerization of a wide variety of arylacetylenes have led us to the conclusion that polymers with considerably wide main‐chain conjugation are accessible from monosubstituted acetylenes bearing condensed aromatic rings 9–12. That is, arylacetylenes with condensed aromatic rings that are designed to yield large steric hindrance between the pendant and the main chain give widely conjugated polymers.…”

Section: Introductionmentioning

confidence: 99%

Application of a Serum-Free Medium for the Growth of Vero Cells and the Production of Reovirus

Butler¹,

Burgener²,

Patrick³

et al. 2000

Biotechnol. Prog.

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Two strains of reovirus (serotype 1 Lang/TIL and serotype 3 Dearing/T3D) were propagated in Vero cells grown in stationary or agitated cultures in a serum-free medium, M-VSFM. Solid microcarriers (Cytodex-1) were used to support cell growth in agitated cultures with a normal doubling time of 25 h. Cell yields of 1 x 10(6) cells/mL were obtained from an inoculum of 2 x 10(5) cells/mL in 4 days in microcarrier cultures. The growth profile and cell yield was not significantly different from serum-supplemented cultures. The virus titer increased by 3-4 orders of magnitude over a culture period of 150 h. The maximum virus titer in stationary cultures reached >1 x 10(9) pfu/mL for both strains of reovirus in M-VSFM. M-VSFM also supported high viral yields in microcarrier cultures. Both the specific productivity and final viral yield was higher in M-VSFM than serum-supplemented cultures. The high viral productivity suggests that this is a suitable system for the production of reovirus as an oncolytic agent for human therapeutic use.

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Polymerization of Phenylacetylenes. IX. Polymerization of β-Naphthylacetylene by WCl6 and MoCl5

Cited by 27 publications

References 10 publications

Synthesis and properties of widely conjugated polyacetylenes having anthryl and phenanthryl pendant groups

Synthesis and properties of widely conjugated polyacetylenes having anthryl and phenanthryl pendant groups

Polymerization of Phenylacetylenes. X. Polymerization of Diphenylacetylene by WCl6- and MoCl5-Based Catalysts

Application of a Serum-Free Medium for the Growth of Vero Cells and the Production of Reovirus

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