الفهرس 
The chemistry of the ethanolaminesOnly 14 pages are availabe for public view
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Abstract
This work concerned with the investigation of the heterogeneous catalytic effect of the transition-metal hydroxy amine complexes on the decomposition of hydrogen peroxide. The metal ions employed are: Copper (II), cobalt (11), and nickel (II). The hydroxy amine ligands used are: monoethanolamine, diethanolamine, and triethanolamine. The role of the chelating ethanolic groups with respect to the reactivity of the complexes was considered from the view point of their effect on the rate and the mechanism of reaction. The influence of the resin parameters such as the degree of resin crosslinkage and the particle size were also clarified. The kinetic studies were conducted using the hemoglobin-hydrogen peroxide-luminol chemilum inescence system in order to measure the residual concentration of hydrogen peroxide during the decomposition process. The kinetic’parameters were determined under different experimental conditions. The spectrophotometric probe used in this study is based upon the reference chromogen 2,2’ - azino-bis (3-ethylbenzthiazoline-6- sulphonate diammonium salt ”ABTS” as a sensor for the highly active and strongly oxidizing species generated during the progress of the catalytic reaction. The ESR investigation were performed using the spin trapping method. The spin trap 5, 5’ - dimethyl-pyrroline -N-oxide ”DMPO” was employed to test the existence of the free radicals generated during the catalytic reaction. It was found that the reaction rate decreases when the number of ethanolic groups increases in all the three types of Cu (II)-, Co (II), and Ni (11)- complexes. The increase of the initial concentration of H202 leads to a decrease of the rate in the case of Cu (TI) and Co (11) complexes. With Ni (11) complexes the rate increased with increasing the initial concentration of H202 Consequently, a step-wise mechanism was proposed for the Cu (TI) and Co (TI) complexes. Whereas a pathway mechanism was suggested for the Ni (11) complex. The isokinetic relationship was applied for each reaction series containing different degrees of resin crosslinkage, and of different ligands complexes. The existence of this relationship provides an evidence for the similarity of the mechanism for each reaction series.