Abstract
New oscillating reactions catalyzed by a tetraazamacrocyclic nickel(Ⅱ) complex NiL(ClO4)2, where L is 2,4,4,9,11,11-hexamethyl-1,5,8,12-tetraazabutadecacyclo-1,5,8,12-tetraene, in acidic bromate medium have been studied. The concentration ranges of main reactant within which the oscillations were observed in the system were obtained. The influences of temperature, Vc ,Br-, Ag+, Hg2+, acetonitrile or acrylamide on the oscillations were discussed. The results indicated that Br-played an important role in the control reaction progress and free radicals, Br2might be involved in the reaction process. It was found that the stirring rate can affect oscillating reactions. The oscillation trajectories of this system were recorded. They were different from classical BZ reaction and some other tetraazamacro-cyclic complexes catalyzed systems.
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