| 摘要 |
<p>A photographic element containing a dye of the structure (I) as a filter dye: <CHEM> wherein: G is oxygen, substituted nitrogen, or C(CN)2; R<1>, R<1>', R<2>, R<2>' independently represent H or a substituent, or R<1> and R<2>, R<1>' and R<2>' may form a ring, which may be substituted or unsubstituted; R<3> is an alkyl, aryl, alkoxy, aryloxy, amino, or heterocyclic, any of which may be substituted or unsubstituted; m is 0, 1, 2 or 3; all of the L together define a methine chain, each L representing a methine any of which may be substituted or unsubstituted; and M<+> is a cation. A method of preparing dyes of the above formula is also provided.</p> |
