关键词: 紫外分光光度法, 反应动力学, 锰, 硫酸, 离子选择电极, 溴酸, 振荡化学反应, 磷酸二氢钠, 振荡反应

In a batch reactor, a complete homogeneous inorganic BZ type oscillator has been designed for the first time based on the BrO3^--H2PO2^--Mn^2^+-Fe(phen)3^2^+-H2SO4 system. Oscillations in [Br^-], [Mn^3^+] and [Fe(phen)3^3^+] have been observed by monitoring either the potential change on bromide ion selective electrode or the change in absorbance for Mn^3^+ at 480nm and Fe(phen)3^3^+ at 630nm by UV spectroscopy. The oscillating reaction products have been analyzed and the total reaction has been obtained. Effects of many factors including the concentrations of reactants, Cl^-, Br^-, Br2, Ag^+, CCl4 etc. have been investigated, based on which the controlling mechanism was discussed. The activation energy of the oscillation has been calculated by studying the effect of reaction temperature on the oscillating period (tp). The roles of two metallic ions in the oscillation have also been studied. According to the experimental results, a novel method to design homogeneous BZ type oscillators in the batch reactor has been developed, by which, not only the inorganic BZ type oscillators, but also a series of other chemical oscillators with amino acids, saccharides and even peptides as the substrates could be designed. As those substrates are of biological functions and essential in the living system, the new type BZ oscillators would be useful to understand the periodic phenomena existed in the biological process.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, REACTION KINETICS, MANGANESE, SULFURIC ACID, ION SELECTIVE ELECTRODE, BROMIC ACID, OSCILLATION CHEMICAL REACTION, MONOSODIUM ORTHOPHOSPHATE, OSCILLATARY REACTION