Modifications in structure of palladium(II) porphinate as a method of regulating the catalysis of hydrogen peroxide decomposition

• Published in: Russian journal of general chemistry Vol. 78; no. 11; pp. 2111 - 2117
• Main Authors: Lomova, T. N., Klyueva, M. E., Klyuev, M. V.
• Format: Journal Article
• Language: English
• Published: Dordrecht SP MAIK Nauka/Interperiodica 01-11-2008
• Subjects: Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Palladium; Electron Absorption Spectrum; Porphyrin; General Chemistry; Macrocycle
• ISSN: 1070-3632; 1608-3350
• DOI: 10.1134/S1070363208110212

Results of kinetic, volumetric, and spectral study of the reaction of alkaline H
2
O
2
decomposition in a water-dimethyl formamide medium catalyzed by Pd
II
P
f
(P
f
is octaethylporphyrin and its monophenyl-, 5,15-diphenyl-, 5,10-diphenyl-, triphenyl-, and tetraphenyl-substituted in
meso
-positions derivatives) under polythermal conditions are presented. It was found that the catalysis is of the heterogeneous nature; intermediates and complete kinetic characteristics (rates, activation parameters, and the orders with respect to all reagents) were determined depending on the macrocycle structure. The sequence of the catalytic activity of palladium(II) porphyrinates was estimated.