Asymmetric silver salt dimers and imaging compositions, materials and methods using same
申请人:EASTMAN KODAK COMPANY
公开号:EP1152287A2
公开(公告)日:2001-11-07
A non-photosensitive silver dimer compound comprises two different silver salts, provided that when the two different silver salts comprise straight-chain, saturated hydrocarbon groups as the silver coordinating ligands, those ligands differ by at least 6 carbon atoms. Many of these silver dimer compounds can be represented by the following Structure I:
wherein each E is independently oxygen, sulfur, nitrogen, selenium, or tellurium, R and R' are different alkyl groups, aryl groups, aromatic heterocyclic groups, or halo atoms, provided that when E is oxygen, R and R' are both straight-chain, saturated hydrocarbon groups, those hydrocarbon groups differ from each other by at least 6 carbon atoms. These silver dimer compounds are useful in thermally-developable imaging materials including thermographic and photothermographic materials.
非光敏银二聚化合物包括两种不同的银盐,条件是当这两种不同的银盐包括直链饱和烃基作为银配位体时,这些配体至少相差 6 个碳原子。许多此类银二聚化合物可由以下结构 I 表示:
其中每个 E 独立地是氧、硫、氮、硒或碲,R 和 R' 是不同的烷基、芳基、芳香杂环基团或卤原子,条件是当 E 是氧时,R 和 R' 都是直链饱和烃基,这些烃基彼此至少相差 6 个碳原子。这些银二聚化合物可用于热显影成像材料,包括热成像和光热成像材料。