增感染料与卤化银微晶之间的作用及其聚集态的研究

STUDY ON THE INTERACTION OF SENSITIZING DYESSILVER\=HALIDE MICROCRYSTAL AND FORMATION OF AGGREGATES

本文研究了光谱增感染料的结构对立方体卤化银乳剂的感光性能的影响，并利用反射光谱和彩色分析荧光电镜研究了染料在卤化银微晶上的聚集态和Ｊ聚集体的相对尺寸，通过测定乳剂离子电导率研究了染料的结构对乳剂离子电导率的影响．实验结果表明：本文中所用的九个染料不管是增感还是减感染料都能在立方体卤化银乳剂上形成Ｊ聚集态；对噻碳菁染料而言，其５位上无论是吸电子基团还是推电子基团的染料形成的Ｊ聚集体的平均尺寸皆较未取代染料的大，其增感效果也较好；苯环５位上吸电子基取代或平面性好的噻碳菁染料可提高立方体ＡｇＢｒＩ乳剂的离子电导率，证明它们的增感效果也好；６位硝基取代的吲哚碳菁染料是典型的减感染料，其在立方体乳剂上所形成的Ｊ聚集体较小，但是对乳剂的离子电导无影响．此外。

The effects of the structures of spectral sensitization dyes on photographic properties and on ionic conductivity of cubic AgX emulsion were investigated. The aggregations of dyes on AgX microcrystum and size distributions of Jaggregates by reflection spectrum and ACFEM were studied in this paper. The results show that all dyes used in this paper can form Jaggregate on cubic AgX emulsion, and the average size of Jaggregates of 5substituted thiacarbocyanine dyes is larger than that of 5unsubsltltuted one. Thiacarbocyanine dyes which are 5substituted by electrondrawing groups or campact can increase ionic conductivity of emulsion. Thiacarbocyanine dyes are sensitizing dyes. The 6nitro substituted indocarbocyanine dye is a typical desensitizing dye and their Jaggregates on cubic AgX emulsion are small but has no effect on ionic conductivity of emulsion.\=