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用循环伏安法测定了一些硫碳菁的氧化还原电位,确定了这类染料环上取代基的Hammett常数σ的取值方法.结果发现,氧化还原电位与σ值之间存在着很好的线性关系.
The redox potential of some thiocarbocyanines was determined by cyclic voltammetry and the Hammett constant σ of the substituents on the dye ring was determined. The results showed that there was a good relationship between the redox potential and the σ value Linear relationship.