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本文用计时电位法及电位滴定研究了十六种不同染料与溴化银之间的相互作用,进一步证明了具有离域π-电子的菁染料才能与卤化银形成络合物的论点。从得到的平衡常数K表明,固体表面上的卤化银-染料与溶液中银离子-染料具有相同键性质,都是银离子与染料离域π-电子作用的结果。
In this paper, the interaction between 16 different dyes and silver bromide was studied by chronopotentiometry and potentiometric titration, which further proved that the cyanine dye with delocalized π-electrons can form a complex with silver halide. The resulting equilibrium constant K shows that the silver halide dye on the solid surface has the same bond properties as the silver ion dye in solution, both as a result of delocalized π-electrons between the silver ions and the dye.