含氟碳菁染料聚集行为的研究

本文对五种不同结构的含氟碳菁染料的甲醇溶液及吸附在碘溴化银T 颗粒表面的聚集行为进行了研究 ,测定了照相性能 ,计算了增感倍率。Dye1 ,Dye2 ,Dye3在甲醇溶液中测得的单分子态吸收曲线 ,当取代基从C2 H5→CH3→无取代基时 ,最大吸收峰对应的波长向短波方向移动 ;乙基取代基的增感染料 (Dye1 )吸附在碘溴化银表面形成的J 聚集态峰值较高 ,对应的增感倍率也高。没有取代基的增感染料 (Dye3)不形成J 聚集 ,增感倍率低 ,有减感作用。Dye4与Dye5相比 ,Dye4具有尖而窄的J 聚集反射光谱 ,增感倍率高。结果表明 :不同结构的增感染料吸附在卤化银颗粒上形成的J 聚集态不同 ,吸收谱带窄的J 聚集态增感染料具有较高的增感倍率。

A Study of Aggregate Behavior of Green-Sensitive Dyes Containing Fluorine

Five different-structure carboncyanine dyes containing fluorine in methanol solution and the aggregate behavior on the surface of AgIBr tabulate grains were investigated, the photographic capability determined and the sensitive mutiple calculated. From the monomolecular absorption curves of dye1, dye2 and dye3 in methanol solution, it can be seen that when the substitute changed from C 2H 5 to CH 3 to no substitute, the maximal absorption peak shifted to a shorter wavelength. Sensitive dye with ethylene (dye1) adsorbed on the AgBrI surface formed a higher peak of J-aggregate with a higher sensitive multiple. Sensitive dye with no substitute (dye3) did not form J-aggregate, which had a low sensitive multiple and reduced the sensitivity. Compased with dye5, dye4 had a sharper and narrower reflective spectrum and a higher sensitive mutiple. The results showed that a different-structure dye adsorbed on silver halide grains formed a different J-aggregate. The sensitive dye of J-aggregate with a sharper absorption spectrum had a higher sensitive multiple.