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    Silver halide light sensitive emulsion layer having enhanced photographic sensitivity
    1.
    发明公开
    Silver halide light sensitive emulsion layer having enhanced photographic sensitivity 失效
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    公开(公告)号：EP0893731A1

    公开(公告)日：1999-01-27

    申请号：EP98202347.5

    申请日：1998-07-13

    申请人： EASTMAN KODAK COMPANY

    发明人： Adin, Anthony ,  Looker, Jerome J. ,  Farid, Samir Yacoub ,  Gould, Ian Robert ,  Godleski, Stephen A. ,  Lenhard, Jerome Robert ,  Muenter, Annabel Adams ,  Vishwakarma, Lal Chand ,  Zielinski, Paul Anthony

    IPC分类号： G03C1/10 ,  G03C1/12

    CPC分类号： G03C1/10 ,  G03C1/12 ,  G03C2200/24

    摘要： A photographic element comprising at least one silver halide emulsion layer in which the silver halide is sensitized with a compound of the formula:
    wherein A is a silver halide adsorptive group that contains at least one atom of N, S, Se, or Te that promotes adsorption to silver halide, and Z is a light absorbing group including for example cyanine dyes, complex cyanine dyes, merocyanine dyes, complex merocyanine dyes, homopolar cyanine dyes, styryl dyes, oxonol dyes, hemioxonol dyes, and hemicyanine dyes,, and XY is an fragmentable electron donor moiety in which X is an electron donor group and Y is a leaving group other than hydrogen, and wherein:

    1) XY has an oxidation potential between 0 and about 1.4 V; and
    2) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X · and the leaving fragment Y.

    In a preferred embodiment of the invention, the radical X · has an oxidation potential ≤-0.7V.

    摘要翻译： 一种照相元件，包括至少一个卤化银乳剂层，其中卤化银用下式化合物致敏：其中A是含有至少一个N，S，Se或者一个原子的卤化银吸附基团 Te是促进对卤化银的吸附，Z是吸光基，其包括例如花青染料，复合花青染料，部花青染料，复合部花青染料，单极花青染料，苯乙烯基染料，氧杂菁染料，半氧化ol染料和半花青染料。 并且XY是可裂解的电子给体部分，其中X是电子给体基团，Y是不同于氢的离去基团，其中：1）XY具有介于0和约1.4V之间的氧化电位; 和2）XY的氧化形式发生键断裂反应，得到基团X'和离去片段Y.在本发明的优选实施方案中，基团X'具有≤-0.7V的氧化电位。