A compound (I) having a carrier moiety (CAR) and a releasable development inhibitor moiety (INH) capable of being released during photographic processing by means of at least one timing group (T) bonded to and releasable from the carrier moiety provides improved images in a photographic silver halide element and process when the inhibitor moiety (INH) comprises (R') a non-aromatic, sterically hindered substituent group having (a) a tertiary carbon atom bonded directly to the releasable development inhibitor moiety or (b) a secondary carbon atom bonded directly to the releasable development inhibitor moiety and wherein the secondary carbon atom is not part of an unsubstituted carbocyclic ring containing at least 6 carbon atoms. Such compounds, particularly as couplers, are useful in photographic silver halide materials and processes to provide improved acutance and interimage effects.
一种化合物(I)具有一个载体分子(CAR)和一个可释放的显影
抑制剂分子(INH),可在照相冲洗过程中通过至少一个与载体分子键合并可从载体分子释放的定时基团(T)释放出来,当
抑制剂分子(INH)包括(R')一个非芳香族、具有(a)直接与可释放的显影
抑制剂分子键合的叔碳原子或(b)直接与可释放的显影
抑制剂分子键合的仲碳原子的立体受阻取代基团时,可在照相卤化
银元件和冲洗过程中提供更好的图像、(a) 直接与可释放的显影
抑制剂分子键合的叔碳原子,或 (b) 直接与可释放的显影
抑制剂分子键合的仲碳原子,其中仲碳原子不是包含至少 6 个碳原子的未取代碳环的一部分。这类化合物,特别是作为耦合剂,可用于照相卤化
银材料和工艺,以提供更好的清晰度和临时显影效果。