美国 Bray W.C.发现,H_2O_2在Mn~(2+)催化下与 KIO_3 -CH_2(COOH)_2反应,I~-和I_2浓度会发生升高降低周期性变化,通常称为碘钟反应。另一类称 B-Z 反应,苏联化学家 BelousovB.P.等发现,溴酸钾和丙二酸在铈盐存在下,产物浓度亦发生周期性变化,用亚铁灵作指示剂,可看到溶液蓝、红颜色周期性地 American Bray W.C. found that H 2 O 2 reacts with KIO 3 -CH 2 (COOH) 2 under Mn 2+ -administration, and the concentration of I ~ - and I 2 will increase to decrease the periodic change, which is usually called iodine clock reaction. Another type of BZ reaction, the Soviet chemist BelousovB.P. Found that potassium bromate and malonic acid in the presence of cerium, the product concentration also cyclical changes occur, with ferrous spirit as an indicator, you can see the solution blue, Red color periodically