Polybenzimidazole-Supported [Rh(cod)Cl]2 Complex: Effective Catalyst for the Polymerization of Substituted Acetylenes

Sedláček, Jan; Pacovská, Marta; Rédrová, Dana; Balcar, Hynek; Biffis, Andrea; Corain, Benedetto; Vohlı́dal, Jiřı́

doi:10.1002/1521-3765(20020118)8:2<366::aid-chem366>3.0.co;2-9

Cited by 30 publications

(10 citation statements)

References 27 publications

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“…The list of signals of all samples is given in the Experimental. The 1 H‐NMR spectra of our PFPhA/Rh samples exhibited features typical for spectra of majority of ring‐substituted PPhAs prepared with various Rh‐catalysts reported in literature 82, 83. The sharpness and good resolution of signals testify to the high degree of microstructure uniformity as concerns (i) the regularity of linkage of monomeric units (H‐T) and (ii) predominant cis configuration of the main‐chain double bonds.…”

Section: Resultssupporting

confidence: 58%

Molecular weight and configurational stability of poly[(fluorophenyl)acetylene]s prepared with metathesis and insertion catalysts

Bondarev

Zednı́k

Plutnarová

et al. 2010

J. Polym. Sci. A Polym. Chem.

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Series of high-cis and cis/trans poly[(fluorophenyl) acetylene]s (PFPhA) have been prepared by polymerization of (2-fluorophenyl)acetylene, (3-fluorophenyl)acetylene, and (4fluorophenyl)acetylene with catalysts: [Rh(1,5-cyclooctadiene) OCH 3 ] 2 (high-cis PFPhAs) and tungsten(VI) oxychloride/tetraphenyltin (cis/trans PFPhAs). The molecular weight and configurational stability under various conditions at room temperature were studied for both PFPhAs series by means of size exclusion chromatography, 1 H-NMR, and UV-vis techniques. All samples exhibited slow degradation when exposed to the atmosphere in the solid state; the rate of degradation was independent on the F-position on the Ph ring. The rate of degradation increased up to three orders of magnitude in the tetrahydrofuran solution where it was higher for high-cis polymers compared with their cis/trans counterparts. The degradation of high-cis PFPhAs was accompanied by significant cis-to-trans isomerization in aerated tetrahydrofuran solution. Rate of degradation and isomerization exhibited the same dependence on the F-position on the Ph ring. The hypothesis was postulated that the degradation of high-cis PFPhAs in solution was accelerated by cis-to-trans isomerization due to which the content of unpaired electrons on the main chains is enhanced. In both high-cis and cis/trans series of polymers the ortho-substituted isomers exhibited an enhanced stability compared with metaand para-substituted isomers.

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Section: Resultssupporting

confidence: 58%

Molecular weight and configurational stability of poly[(fluorophenyl)acetylene]s prepared with metathesis and insertion catalysts

Bondarev

Zednı́k

Plutnarová

et al. 2010

J. Polym. Sci. A Polym. Chem.

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“…S8) analysis of the acetone washings indicated the presence of polyphenylacetylene (PPhA) oligomers. The 1 H NMR spectra revealed the characteristic peak at 6.09 ppm associated to the vinyl protons of the PPhA chain, alongside with the multiplets at 6.60 ppm and 7.05 ppm corresponding to aromatic protons [46][47][48] [49]. Consistently with these results, the IR spectra presented bands at 696 cm -1 , 754 cm -1 , 849, cm -1 , and 1443 cm -1 associated to…”

Section: Hydroamination Of Phenylacetylene With Anilinesupporting

confidence: 69%

Gold nanoparticles supported on functionalized silica as catalysts for alkyne hydroamination: A chemico-physical insight

Parise

Ballarin

Barreca

et al. 2019

Applied Surface Science

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“…In terms of polymer architecture, the PPCs are highly aromatic polymer networks the permanent porosity of which results from the rigidity of the network segments and extensive cross‐linking. Due to the permanent porosity, the PPCs are fundamentally different from conventional polymer supported catalysts based on solvent‐swellable polymers . The preparation of PPCs utilizes organic and polymer synthesis techniques, which makes possible to prepare PPCs with a wide spectrum of covalent structures distinguishing thus PPCs from compositionally less variable heterogeneous catalysts based on inorganic porous materials …”

Section: Introductionmentioning

confidence: 99%

Sulfonated Hyper‐cross‐linked Porous Polyacetylene Networks as Versatile Heterogeneous Acid Catalysts

et al. 2019

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Two highly sulfonated micro/mesoporous polymers, P(1,3‐DEB)‐SO3H and P(1,4‐DEB)‐SO3H, with permanent porosity, the specific surface area about 550 m2 ⋅ g−1 and the content of SO3H groups of 2.7 mmol ⋅ g−1 were prepared as new acid Porous Polymer Catalysts, PPCs. The PPCs were achieved by easy sulfonation of parent hyper‐cross‐linked micro/mesoporous polyacetylene‐type networks resulting from a chain‐growth homopolymerization of 1,3‐ and 1,4‐diethynylbenzenes. New PPCs are reported as highly active and reusable heterogeneous catalysts of esterification of fatty acids with methanol and ethanol, Prins cyclization of aldehydes with isoprenol and intramolecular Prins cyclization of citronellal to isopulegol. The catalytic activity of the micro/mesoporous PPCs (TON values up to 522 mol ⋅ mol−1) was higher than that of commercial polymer‐based heterogeneous catalyst Amberlyst 15 possessing gel texture without permanent pores and that of p‐toluenesulfonic acid applied as a homogeneous catalyst.

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Polybenzimidazole-Supported [Rh(cod)Cl]2 Complex: Effective Catalyst for the Polymerization of Substituted Acetylenes

Cited by 30 publications

References 27 publications

Molecular weight and configurational stability of poly[(fluorophenyl)acetylene]s prepared with metathesis and insertion catalysts

Molecular weight and configurational stability of poly[(fluorophenyl)acetylene]s prepared with metathesis and insertion catalysts

Gold nanoparticles supported on functionalized silica as catalysts for alkyne hydroamination: A chemico-physical insight

Sulfonated Hyper‐cross‐linked Porous Polyacetylene Networks as Versatile Heterogeneous Acid Catalysts

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