摘要
本文首次报道酪氨酸-KBrO_3-H_2SO_4体系的非催化化学振荡反应及在Ce^(3+)等金属离子催化下的振荡反应,研究了振荡反应产物及许多因素对振荡反应的影响,讨论了非催化振荡反应的控制机理。根据实验结果以及振荡反应的一般机理,对上述体系非催化振荡反应的机理作了初步的探索,并用以对实验现象作了定性说明。
A new chemical oscillating system involving aminoacid——the system of aspartic acid-BrO_3^--Mn^(2+)-Fe(Phen)_3~2-H_2SO_4 has been described and its oscillating feature has been studied. It is shown that chloride ion, bromide ion,acetone, bromine and acrylonitrile inhibit the oscillation. The analysis of reacting products shows that oxalacetie acid and bromooxaiacetie acid are two of the products of this oscillating reaction. According to the experimental facts and the FKN mechanism, the model, called the Br_2-hydrolysis control model, has been proposed. The oscillating figure calculated from this model is in good agreement with the experimental figure. With this model we give the successful explanation of all the experimental observations and the role of the two metal ions in the oscillating reaction is described.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1990年第5期478-482,共5页
Acta Chimica Sinica
