3-Aminoallylidenemalononitrile compounds corresponding to the formula:
wherein R, is a short alkyl chain having 1 to 3 carbon atoms and R is a substituted or unsubstituted long alkyl chain greater than 10 carbon atoms,
are useful in photography for absorbing ultraviolet radiations in the range from 360 to 400 nm, with no undesired absorption near 420 nm, when introduced in a photographic gelatin layer.
3-Aminoallylidenemalononitrile 化合物的
化学式如下:其中 R 是具有 1 至 3 个
碳原子的短烷基链,R 是大于 10 个
碳原子的取代或未取代的长烷基链,当引入摄影明胶层时,可用于吸收 360 至 400 纳米范围内的紫外线辐射,而在 420 纳米附近没有不希望的吸收。