Abstract
Catalysis by cationic polyelectrolytes of the decarboxylation of 6-nitrobenzisoxazole-3-carboxylate anion was studied in a buffer solution. The polyelectrolytes used were insoluble cross-linked styrene–divinylbenzene copolymers containing quaternized ammonium chloride and water-soluble polystyrene analogue. Tne cross-linked polymer catalysts showed much higher catalytic activities for decarboxylation than that of a linear polymer analogue, a cationic micelle, or a monomeric quaternary ammonium salt. The cross-linked polymers which acted as efficient catalysts caused hypsochromic shift of the fluorescence maximum wavelength of 6-p-toluidino-2-naphthalene sulfonate in the fluorescent emission spectra. From this observation, the acceleration by cross-linked polymer catalysts was apparently caused by the formation of a hydrophobic microenvironment around the catalytic sites. A reaction mechanism in the heterogeneous system was proposed on the basis of kinetic studies of decarboxylation.
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Yamazaki, N., Nakahama, S., Hirao, A. et al. Catalysis by Cross-Linked Cationic Polymers. I. The Decarboxylation of 6-Nitrobenzisoxazole-3-carboxylate Anion Catalyzed by Cross-Linked Polystyrene Resins Having Quaternized Ammonium Chloride. Polym J 12, 231–238 (1980). https://doi.org/10.1295/polymj.12.231
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DOI: https://doi.org/10.1295/polymj.12.231