A silver halide photographic material composed of a support having thereon at least one silver halide photosensitive emulsion layer, at least one layer of the material containing a blocked photographic reagent precursor represented by formula (I):
wherein X1 represents a divalent linking group containing a hetero atom bonded to the carbon atom, provided that X1 is linked to the carbon atom by a group other than
PUG represents a photographically useful group containing a hetero atom bonded to X1; W represents = N- or
represents hydrogen or a group capaable of being substituted; Z represents an atomic group necessary for forming a heterocyclic ring, provided that when W represents a
group, the group adjacent to W in the heterocyclic ring is a group other than
wherein R1, R2, R3, R4 and R5 each represents hydrogen or or group capable of being substituted; and m is 0 or 1, with proviso that when m is 0, the photographically useful group represented by PUG is bonded to a carbon atom via heteroatom of PUG. The photographic materials have superior stability during storage, and are capable of releasing a photographic reagent with specifically required timing during processing, and in a wide pH range.
一种卤化
银感光材料,由至少有一层卤化
银感光乳剂层的支撑体组成,该材料的至少一层含有由式 (I) 表示的封端感光试剂前体:
其中 X1 代表含有与碳原子键合的杂原子的二价连接基团,但 X1 与碳原子之间的连接基团必须不是
PUG 代表含有与 X1 键合的杂原子的摄影有用基团; W 代表=N-或
代表氢或可被取代的基团;Z 代表形成杂环所需的原子团,但当 W 代表
当 W 代表一个基团时,杂环中与 W 相邻的基团是一个基团,而不是
其中 R1、R2、R3、R4 和 R5 分别代表氢或可被取代的基团;以及 m 为 0 或 1,但当 m 为 0 时,PUG 所代表的对照片有用的基团通过 PUG 的杂原子与碳原子结合。这种感光材料在贮存过程中具有优异的稳定性,在加工过程中能够按照特定要求的时间释放感光试剂,并且适用于较宽的 pH 值范围。