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用离心分离法得到25℃菁染料Ⅱ和Ⅲ分别在几种溶剂的溴化银分散系中的吸附等温线;记录了染料溶液的吸收光谱和吸附态染料的反射光谱。采用精密量热技术得到25±0.01℃溴化银从DMF-水溶液中吸附染料Ⅱ等位摩尔吸附热为-(3.18±0.09)KJ/mol(θ=0.87)。还对从DMF溶液中吸附染料Ⅱ的体系绘制了以单位溴化银表面的吸附热表示的吸附等温线,表明用精密量热技术可以研究染料的吸附过程。
The adsorption isotherms of cyanine dyes Ⅱ and Ⅲ in several silver bromide dispersions at 25 ℃ were obtained by centrifugal separation. The absorption spectra and the reflection spectra of the adsorbed dyes were recorded. Adsorption of dye Ⅱ with 25 ± 0.01 ℃ silver bromide from DMF-water solution using a calorimetric technique showed an isothermal molar adsorption heat of (- 3.18 ± 0.09) KJ / mol (θ = 0.87). The adsorption isotherm was also plotted for the system adsorbing dye II from the DMF solution on the unit silver bromide surface, indicating that the dye adsorption process can be studied using precision calorimetric techniques.