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Ger Challa

Affiliations: 
1965-1994 chemistry University of Groningen, Groningen, Netherlands 
Area:
polymer chemistry
Website:
http://www.knaw.nl/nl/leden/leden/3980
Google:
"Ger Challa"
Bio:

https://hoogleraren.ub.rug.nl/hoogleraren/537-challa-gerrit-ger
G. Challa at the Album Academicum of the University of Amsterdam
http://chg.kncv.nl/geschiedenis/biografieen/c/challa,-g.

Mean distance: 8.45
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Parents

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Jan A.A. Ketelaar grad student 1959 Amsterdam
 (Formation of polyethylene terephthalate by ester interchange : equilibria kinetics and molecular weight distribution)

Children

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Pieter Jan Lemstra grad student 1975 RUG
Arend Jan Schouten grad student 1980 RUG
Dick J. Broer grad student 1990 RUG

Collaborators

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Publications

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Viersen FJ, Challa G, Reedijk J. (2010) Mechanistic studies of the oxidative-coupling polymerization of 2,6-dimethylphenol. Part II. Specificity of the reaction and formation of diphenoquinone†‡ Recueil Des Travaux Chimiques Des Pays-Bas. 109: 97-102
Viersen FJ, Challa G, Reedijk J. (2010) Mechanistic studies of the oxidative‐coupling polymerization of 2,6‐dimethylphenol. Part V: Effect of different copper counter‐ions on the structure of the copper complex, its catalytic activity and specificity for polymer formation Recueil Des Travaux Chimiques Des Pays-Bas. 108: 247-255
Gupta S, van Dijk JAPP, Gamez P, et al. (2007) Mechanistic studies for the polymerization of 2,6-dimethylphenol to poly(2,6-dimethyl-1,4-phenylene ether): LC-MS analyses showing rearrangement and redistribution products Applied Catalysis a: General. 319: 163-170
Gamez P, Simons C, Aromí G, et al. (2001) Small heterocyclic ligands improve the copper-catalyzed oxidative coupling of 2,6-dimethylphenol to poly(2,6-dimethyl-1,4-phenylene ether) Applied Catalysis a: General. 214: 187-192
Baesjou PJ, Driessen WL, Challa G, et al. (1999) The Course of the Copper-Catalyzed Oxidative Polymerization of 2,6-Dimethylphenol. Analysis of Oligomeric Phenols during the Coupling Reaction Macromolecules. 32: 270-276
Baesjou PJ, Driessen WL, Challa G, et al. (1999) Kinetics and selectivity of the copper-catalysed oxidative coupling of 4-(2',6'-dimethylphenoxy)-2,6-dimethylphenol Journal of Molecular Catalysis a: Chemical. 140: 241-253
Baesjou PJ, Driessen WL, Challa G, et al. (1998) A kinetic study of the copper-catalysed oxidative coupling of 2,6-dimethylphenol. The role of copper, base and phenol concentrations Journal of Molecular Catalysis a: Chemical. 135: 273-283
Baesjou PJ, Driessen WL, Challa G, et al. (1997) Ab initio calculations on 2,6-dimethylphenol and 4-(2,6- dimethylphenoxy)-2,6-dimethylphenol. Evidence of an important role for the phenoxonium cation in the copper-catalyzed oxidative phenol coupling reaction Journal of the American Chemical Society. 119: 12590-12594
Haitjema HJ, Buruma R, Alberda Van Ekenstein GOR, et al. (1996) New photoresponsive (meth)acrylate (co)polymers containing azobenzene pendant sidegroups with carboxylic and dimethylamino substituents - II. Synthesis and characterization of polymers and copolymers European Polymer Journal. 32: 1447-1455
Baesjou PJ, Driessen WL, Challa G, et al. (1996) A kinetic and spectroscopic study on the copper catalyzed oxidative coupling polymerization of 2,6-dimethylphenol. X-ray structure of the catalyst precursor tetrakis(N-methylimidazole)bis(nitrato)copper(II) Journal of Molecular Catalysis a: Chemical. 110: 195-210
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