Cyanine dyes for sensitizing silver halide emulsions to infrared radiation and photographic elements including them
申请人:MINNESOTA MINING AND MANUFACTURING COMPANY
公开号:EP0088595A2
公开(公告)日:1983-09-14
Cyanine dyes including two nitrogen containing heterocyclic nuclei, linked to each other through a rigidized conjugated 7, 9 or 11 carbon atom methine chain to form an amidinium-ion resonance system, are very good for sensitizing silver halide emulsions for use in photographic elements to be exposed to infrared radiation if one of said heterocyclic nuclei is 5-methyl-6-methoxy-benzothiazole.
如果所述杂环核之一是 5-甲基-6-甲氧基-苯并噻唑,那么包括两个含氮杂环核的氰基染料,通过刚性共轭的 7、9 或 11 个碳原子的甲基链相互连接,形成一个脒离子共振系统,非常适合于对卤化银乳剂进行感光,以用于暴露于红外辐射的摄影元件。