A non-infrared sensitized low silver photographic element with a non-light sensitive layer, preferably an antihalation layer, containing a diphenylaminocyclopentene heptacyanine benzothiazolium infrared dye where the benzothiazolium groups have electron-withdrawing substituents on the phenyl ring and solubilzed alkyl groups on the nitrogen. The infrared dye can be present as a liquid-crystalline dispersion. This class of infrared dyes form J-aggregrated species in a liquid-crystalline or a solid particle dispersion with high IR density and low visible absorbance.
一种非红外敏化低
银光感光元件,具有非光敏感层,最好是一种含有
二苯胺环戊烯七
氰基
苯并噻唑离子红外
染料的抗光散层,其中
苯并噻唑离子基团在苯环上具有电子吸引取代基,氮原子上具有可溶性烷基基团。红外
染料可以以液晶分散形式存在。这类红外
染料在液晶或固体颗粒分散体系中形成J-聚集物种,具有高红外密度和低可见吸收率。