Nine indole and benzimidazole cyanine dyes, used as green-sensitizing dyes in photographic emulsions, are synthesized. The compounds are characterized from mass spectrometric and NMR spectroscopic data, and elemental analysis. FAB mass spectrometry proved to be an efficient method for determining the structure of the compounds. From UV–VIS data of the compounds the sensitizing properties of the cyanine dyes are predicted. The reflection spectrum of Gs2-9 coated in photographic emulsions showed J-aggregation behaviour at λ= 560 nm. Unsymmetric benzimidazole–indole cyanine dyes showed good to excellent green sensitizing properties in photographic emulsions, whereas symmetric indole cyanine dyes showed heavy residual colour and no sensitizing properties.
合成了九种
吲哚和
苯并咪唑青链
染料,作为摄影乳剂中的绿敏化
染料。通过质谱、核磁共振光谱数据和元素分析对这些化合物进行了表征。FAB质谱证明是一种有效的确定化合物结构的方法。根据化合物的UV–VIS数据,可以预测青链
染料的敏化特性。涂覆在摄影乳剂中的Gs2-9的反射光谱在λ= 560 nm处表现出J聚集行为。不对称的
苯并咪唑–
吲哚青链
染料在摄影乳剂中表现出良好至优异的绿敏化特性,而对称的
吲哚青链
染料则显示出严重的残留颜色且没有敏化特性。