Silver halide light sensitive emulsion layer having enhanced
photographic sensitivity
    11.
    发明授权
    Silver halide light sensitive emulsion layer having enhanced photographic sensitivity 失效
    具有增强的照相感光度的卤化银感光乳剂层

    公开(公告)号:US6054260A

    公开(公告)日:2000-04-25

    申请号:US118714

    申请日:1998-07-17

    IPC分类号: G03C1/09 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: ##STR1## 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; and2) the oxidized form of XY undergoes a bond cleavage reaction to give the radical X.sup..cndot. and the leaving fragment Y.In a preferred embodiment of the invention, the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7 V.

    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是含有至少一个促进的N,S,Se或Te原子的卤化银吸附基团 Z为吸光性基团,例如为花青染料,复合花青染料,部花菁染料,复色部花青染料,单极花青染料,苯乙烯基染料,氧杂菁染料,半氧杂菁染料,半花青染料,XY为 其中X是电子给体基团,Y是除氢以外的离去基团,其中:1)XY具有介于0和约1.4V之间的氧化电位; 和2)XY的氧化形式经历键断裂反应,得到基团X.和离去片段Y.在本发明的一个优选实施方案中,基团X的氧化电势为-0.7V。

    Silver halide light sensitive emulsion layer having enhanced
photographic sensitivity
    13.
    发明授权
    Silver halide light sensitive emulsion layer having enhanced photographic sensitivity 失效
    具有增强的照相感光度的卤化银感光乳剂层

    公开(公告)号:US5747235A

    公开(公告)日:1998-05-05

    申请号:US739921

    申请日:1996-10-30

    CPC分类号: G03C1/09 G03C1/10 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: ##STR1## 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 L represents a linking group containing at least one C, N, S or O atom, k is 1 or 2, 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.sup..cndot. and the leaving fragment Y. In a preferred embodiment of the invention, the radical X.sup..cndot. has an oxidation potential .ltoreq.-0.7V.

    摘要翻译: 一种照相元件,包括至少一个卤化银乳剂层,其中卤化银用下列化学式的化合物敏化:含有至少一个促进对卤化银吸附的N,S,Se或Te原子,L和 表示含有至少一个C,N,S或O原子的连接基团,k为1或2,XY为可裂解的电子给体部分,其中X为电子给体基团,Y为氢以外的离去基团, 其中:1)XY具有介于0和约1-4V之间的氧化电位; 和2)XY的氧化形式经历键断裂反应以得到基团X.和离去片段Y.在本发明的一个优选实施方案中,基团X的氧化势为-0.7V。

    Process for the preparation of 1,4-disubstituted 2-butenes
    14.
    发明授权
    Process for the preparation of 1,4-disubstituted 2-butenes 失效
    制备1,4-二取代的2-丁烯的方法

    公开(公告)号:US5189199A

    公开(公告)日:1993-02-23

    申请号:US839747

    申请日:1992-02-20

    IPC分类号: C07C41/02

    CPC分类号: C07C41/02 C07C67/26

    摘要: A process is disclosed for the preparation of 1,4-dioxy-2-butenes by reacting 3,4-epoxy-1-butene with an oxygen nucleophile in the presence of a Pd(O) complex catalyst.

    摘要翻译: 公开了一种通过在Pd(O)配合物催化剂存在下使3,4-环氧-1-丁烯与氧亲核试剂反应来制备1,4-二氧-2-丁烯的方法。

    Photographic emulsion having an improved speed, photographic element
containing said emulsion, and method
    16.
    发明授权
    Photographic emulsion having an improved speed, photographic element containing said emulsion, and method 失效
    具有改善速度的照相乳剂,含有所述乳液的照相元件和方法

    公开(公告)号:US06040129A

    公开(公告)日:2000-03-21

    申请号:US288900

    申请日:1999-04-09

    IPC分类号: G03C1/08 G03L1/08

    CPC分类号: G03C1/08

    摘要: A photographic emulsion comprising dispersed in a binder sensitized silver halide grains wherein the emulsion is sensitized from an organometallic compound of formula:(R).sub.n (X).sub.m M (I)wherein M is a metal selected from the group consisting of lead, tin, boron, bismuth and thallium, each R is independently an alkyl group, a cycloalkyl group, an aryl group, a heterocyclic group, an alkenyl group or a alkynyl group, each X is independently halogen, hydroxy, or alkoxy, n is 1 to 4 and m is 0 to 3, with the proviso that when M is lead or tin, n is 1 to 4 and m+n is 4, when M is boron or bismuth, n is 1 to 3 and m+n is 3 and when M is thallium, either n is 1 and m is 0, or n is 1 to 3 and n+m is 3.

    摘要翻译: 包含分散在粘合剂敏化卤化银颗粒中的照相乳剂,其中所述乳液由下式的有机金属化合物敏化:(R)n(X)mM(I)其中M是选自铅,锡, 硼,铋和铊,每个R独立地为烷基,环烷基,芳基,杂环基,烯基或炔基,每个X独立地为卤素,羟基或烷氧基,n为1至4 m为0〜3,条件是当M为铅或锡时,n为1〜4,m + n为4,当M为硼或铋时,n为1〜3,m + n为3, M为铊,n为1,m为0,n为1〜3,n + m为3。