A photosensitive photographic material is described comprising a support bearing a silver halide emulsion layer sensitised with a dye of the general formula:
wherein
Y is S or Se,
L¹, L², L³, L⁴ and L⁵ are each independently substituted or unsubsituted methine groups,
A is N-R³, O or S,
B is N-R⁴ when A is O, or N-R⁴, S, or O when A is N-R³,
R¹, R², R³ and R⁴ are each a substituted or unsubstituted alkyl or a substituted or unsubstituted aryl group,
R⁵ is an alkyl group of 1-4 carbon atoms,
n is 0, 1 or 2, and
X is a counterion,
and wherein at least two of R¹, R², R³ and R⁴ are substituted with an acid or acid salt substituent.
描述了一种感光照相材料,它包括一个支架,支架上有一个用通式
染料感光的卤化
银乳剂层:
其中
Y 是 S 或 Se、
L¹、L²、L³、L⁴ 和 L⁵ 各自独立地为取代或未取代的甲基、
A 是 N-R³、O 或 S、
当 A 为 O 时,B 为 N-R⁴;当 A 为 N-R³ 时,B 为 N-R⁴、S 或 O、
R¹、R²、R³ 和 R⁴ 各为取代或未取代的烷基或取代或未取代的芳基、
R⁵ 是含有 1-4 个碳原子的烷基、
n 是 0、1 或 2,以及
X 是反离子、
其中 R¹、R²、R³ 和 R⁴ 中至少有两个被酸或酸盐取代基取代。