Photographic materials having releasable compounds

Details Photographic materials having releasable compounds Photographic materials having releasable compounds

G - Physics

03

C

96/105

G03C 7/32 (2006.01) G03C 7/305 (2006.01)

Patent

CA 1338080

Photographic elements are disclosed having a first coupler represented by the formula: COUP1-T-INH wherein COUP1 is a coupler moiety, T is a timing group bonded to INH through a substituted or unsubstituted methylene group contained in T and bonded to COUP1 through an O, S, or N atom contained in T, and INH is a development inhibitor moiety, and wherein the T-INH group is able to undergo electron transfer along a conjugated system therein to cleave INH after T-INH is cleaved from COUP1, and a second coupler represented by the formula: COUP2-(TIME)n-S-R1-R2 wherein COUP2 is a coupler moiety, TIME is a timing group, n is 0 or 1, R1 is a divalent linking group that does not include a heterocyclic ring attached directly to S, and R2 is a water solubilizing group.

601347

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