Spectrally sensitized silver halide photographic emulsion

Abstract

Abstract A SPECTRALLY SENSITIZED SILVER HALIDE PHOTOGRAPHIC EMULSION CONTAINING AT LEAST ONE SENSITIZING DYE REPRESENTED BY THE FOLLOWING FIRST FORMULA: 1-R3,2-((1-R4,3-R2,4,5-(-Z2-)IMIDAZOLIN-2-YL)=CH-CH=CH-), 3-R1,4,5-(-Z1-)IMIDAZOLIUM (X1-)P-1 WHEREIN R1, R2, AND R4 EACH REPRESENT ALKYL GROUPS, AT LEAST ONE OF SAID R3 AND R4 BEING AN ALKYL GROUP HAVING A SULFO GROUP; Z1 AND Z2 REPRESENT THE NON-METALLIC ATOMIC GROUPS NECESSARY TO COMPLET A BENZIMIDAZOLE NUCLEUS; X1-REPRESENTS AN ACID ANION AND P REPRESENTS AN INTEGER OF 1 OR 2, P BEING 1 WHEN SAID DYE FORMS AN INTERMOLECULAR SALT; AND AT LEAST ONE SENSITIZING DYE REPRESENTED BY THE FOLLOWING SECOND FORMULA: 1-R5,2-(R6-N<(-Z4-C(=CH-)-)),5,6-(-Z3-)PYRIDINIUM (X2-)Q-1 WHEREIN Z3 REPRESENTS THE ATOMIC GROUP NECESSARY TO COMPLETE A QUINOLINE NUCLEUS; Z4 REPRESENTS THE NONMETALLIC ATOMIC GROUP NECESSARY TO COMPLETE A BENZOTHIAZOLE OR BENZOSLENAZOLE NUCLEUS SUBSTITUTED BY A CARBOXYLIC ACID, AN ALKOXYCARBONYL, A CARBAMOYL, OR AN ACYL GRUP; R5 AND R6 REPRESENT ALKYL GRUPS, AT LEAST ONE OF SAID R5 AND R6 BEING AN ALKYL GROUP HAVING A SULFO GROUP; V2-REPRESENTS AN ACID ANION AND Q HAS THE SAME MEANING AS P.

Inventors

• 👤 Keisuke Shiba
• 👤 Tadashi Ideka
• 👤 Akira Sato

Bibliographic Details