Super-sensitizing dye combination in silver halide emulsions
    9.
    发明授权
    Super-sensitizing dye combination in silver halide emulsions 失效
    超敏感染料在银盐乳液中的组合

    公开(公告)号:US3861920A

    公开(公告)日:1975-01-21

    申请号:US43022374

    申请日:1974-01-02

    Applicant: POLAROID CORP

    CPC classification number: G03C1/29

    Abstract: A photosensitive silver halide emulsion is disclosed which is spectrally sensitized with a dye combination comprising a symmetrical benzoxazolocarbocyanine dye of the formula:

    WHEREIN R represents hydrogen or a lower alkyl group possessing from 1 to 3 carbon atoms, inclusive; and each R1 represents a carboxyalkyl or sulfoalkyl group possessing from 1 to 4 carbon atoms, inclusive, in the alkylene chain; Y represents an anion; and n represents 0 or 1, with n 0 in the inner salt form of the dye; and an unsymmetrical benzimidazolocarbocyanine dye of the formula:

    WHEREIN Y and n possess the same meaning as in Formula I; X is S or Se; R2 is a lower alkyl group possessing from 1 to 3 carbon atoms inclusive; R3 and R4 are the same or different and represent a carboxyalkyl or sulfoalkyl group, each possessing from 1 to 4 carbon atoms, inclusive, in the alkylene chain, or a lower alkyl group, with at least one of R3 and R4 being said carboxyalkyl or sulfoalkyl group; R5 is halogen, cyano, or lower carboxyalkyl; R6 is hydrogen or halogen; and Z represents the non-metallic atoms necessary to complete a benzothiazole or benzoselenazole nucleus.

    Abstract translation: 公开了一种感光卤化银乳剂,其用染料组合进行光谱增感,染料组合包含下式的对称苯并恶唑碳花青染料:

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