Patent ID: 6413708
Filing Date: 2002-07-02
Classification: G03C

Abstract:
An imaging element comprising an imaging layer having associated therewith a compound of Structure I: wherein:PUG is a photographically useful group; LINK 1 and LINK 2 are linking groups; TIME is a timing group; l is 0 or 1; m is 0, 1, or 2; n is 0 or 1; l+n&gE;0; t is 1 or 2 and when t is 2, the two T groups can combine to form a ring; Y is C, N, O or S; X is a substituted or unsubstituted aryl group, an electron-withdrawing group, or a substituted or unsubstituted heteroaromatic group the latter which optionally can form a ring with a T or R12 group; W is independently selected from hydrogen, halogen, or a substituted or unsubstituted alkyl cycloalkyl, aryl, or heterocyclic group; w is 0 to 3 when Y is C; w is 0-2 when Y is N; and w is 0-1 when Y is O or S; wherein when w is 2, the two W groups can combine to form a ring, and when w is 3, two W groups can combine to form a ring or three W groups can combine to form an aryl group or a bicyclic substituent; and wherein W in combination with T or R12 can form a ring; R12 is hydrogen, or a substituted or unsubstituted alkyl, cycloalkyl, aryl or heterocyclic group or R12 can combine with W, Y, or T to form a ring system; T is a monovalent electron withdrawing group, a divalent electron withdrawing group, an aryl group substituted with one to seven electron withdrawing groups, or a substituted or unsubstituted heteroaromatic group; or when T is a divalent electron withdrawing group or an aryl group or a heteroaromatic group, it can combine with Y, W or R12 to form a ring system; a is 1 when X is monovalent and 1 or 2 when X is divalent; and b is 0 when X is monovalent and 1 when X is divalent.