Zobrazeno 1 - 10
of 136
pro vyhledávání: '"Ger Challa"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 109:97-102
Copper-(N,N,N′,N′-tetramethylethylenediamine) (tmed) complexes as catalysts in the oxidative-coupling polymerization of 2,6-dimethylphenol (DMP) give rise to poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) in high yield, although the formation of th
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 108:247-255
In studying the mechanism of the oxidation coupling polymerization of 2,6-dimethylphenol, the effect of the copper counter-ion was also investigated. This polymerization is catalyzed by copper(II)-amine complexes. In these experiments, tmed*** is use
Publikováno v:
Applied Catalysis A: General. 319:163-170
For a detailed investigation of the mechanism of the oxidative coupling polymerization of 2,6-dimethylphenol (DMP) to poly(2,6-dimethyl-1,4-phenylene ether) (PPE), reactions were carried out with a mixture of 4-(2′,6′-dimethylphenoxy)-2,6-dimethy
Publikováno v:
Advanced Synthesis & Catalysis. 344:890-893
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 175:27-31
The ligands bipyridine (bpy), 4,4′-dimethoxy-2,2′-bipyridyl (dMeObpy), 4,4′-dimethyl-2,2′-bipyridyl (dMebpy), 4,4′-dichloro-2,2′-bipyridyl (dClbpy) and 4,4′-dinitro-2,2′-bipyridyl (dNO 2 bpy), when combined with copper(II) nitrate ren
Autor:
Chrétien Simons, Jan Reedijk, Ger Challa, Rosienne H Steensma, Willem L. Driessen, Patrick Gamez
Publikováno v:
European Polymer Journal. 37:1293-1296
The oxidative polymerisations of 2,6-dimethylphenol with copper-(1-methylimidazole) complexes as the catalyst precursor compounds in different solvents showed the catalysts to be extremely active when using acetonitrile. Acetonitrile can act as a lab
Publikováno v:
Macromolecules. 32:270-276
The course of the copper-catalyzed oxidative coupling of 2,6-dimethylphenol (DMP) has been studied by HPLC-analysis of reaction mixtures which had started with either DMP itself, or with its C-O coupled dimer, 4-(2',6'-dimethylphenoxy)-2,6-dimethylph
Publikováno v:
Journal of Molecular Catalysis A: Chemical. 135:273-283
The influence of varying concentrations and ratios of phenol, base and copper on the copper/N-methylimidazole catalysed oxidative coupling of 2,6-dimethylphenol (DMP) has been studied. The reaction obeys simple Michaelis-Menten kinetics with respect
Publikováno v:
Journal of the American Chemical Society. 119:12590-12594
Ab initio unrestricted Hartree−Fock calculations with a 6-31G* basis set were performed on 2,6-dimethylphenol (DMP or monomer) and 4-(2,6-dimethylphenoxy)-2,6-dimethylphenol (dimer) to gain more insight into the mechanism of the copper-catalyzed ox
Publikováno v:
European Polymer Journal. 32:1447-1455
The title (co)polymers, used for our investigations on their photoresponsive behaviour were obtained by free radical (co)polymerization. The monomer was either an acrylate or a methacrylate to which an azobenzene group, modified with a para-placed di