Silver halide photographic element comprising a support and at least one silver halide emulsion layer, characterised in that said silver halide emulsion layer is spectrally sensitized to infrared radiation with a tricarbocyanine dye having the formula:
wherein,
Z₁ and Z₂ each independently represents the atoms necessary to complete a thiazole nucleus or an oxazole nucleus,
Z₃ represents the atoms necessary to complete a 5-membered N-containing aromatic ring, Q represents the atoms necessary to complete a 5- or 6- membered carbocyclic ring, R₁ and R₂ each independently represents an alkyl group,X⁻ represents an anion, and n represents an integer of 1 to 2, provided that n is 1 when the dye forms an intramolecular salt.
卤化
银感光元件,包括一个支撑体和至少一个卤化
银乳剂层,其特征在于所述卤化
银乳剂层在红外辐射下用具有以下式子的三羰
花青染料分光感光:
其中
Z₁ 和 Z₂ 各自独立地代表完成
噻唑核或
噁唑核所需的原子、
其中,Z₁ 和 Z₂ 各自独立地代表完成
噻唑核或
噁唑核所需的原子,Z₃ 代表完成 5 元含 N 芳环所需的原子,Q 代表完成 5 或 6 元碳环所需的原子,R₁ 和 R₂ 各自独立地代表烷基,X- 代表阴离子,n 代表 1 至 2 的整数,但当
染料形成分子内盐时,n 为 1。