Spectrally sensitized photographic emulsions

Abstract

Abstract A SILVER HALIDE LIGHT-SENDITIVE PHOTOHRAPHIC EMULSION CONTAINING AT LEAST ONE SENSITIZING DYE REPRESENTED BY THE FOLLOWING FORMULA I: (-Z1-N(+)(-R1)=)>C-CH=C(-R)-CH=C<(-Z2-N(-R2)-) (X1(-))(N-1) IN WHICH R IS A HYDROGEN ATOM OR AN ALKYL GROUP HAVING FROM 1 TO 4 CARBON ATOMS; R1 AND R2, WHICH MAY BE THE SAME OR DIFFERENT, EACH REPRESENTS AN ALKYL GROUP, AN ALLYL GROUP AND AN ALKYL GROUP SUBSTITUTED BY HYDROXY, CARBOXY, SULFO OR MIXTURES THEREOF, AT LEAST ONE OF R1 AND R2 BEING A SUBSTITUTED ALKYL GROUP; Z1 IS A NON-METALLIC ATOMIC GROUP NECESSARY TO COMPLETE A HETEROCYCLIC NUCLEUS OF THE NAPHTHOTHIAZOLE, NAPHTHOSELENAZOLE OR NAPHTHOXAZOLE SERIES; Z2 IS A NON-METALLI GROUP NECESSARY TO COMPLETE A NUCLEUS OF THE NAPHTHOSELENAZOLE, NAPHTHOXAZOLE, NAPHTHOIMIDAZOLE OR BENZIMIDAZOLE SERIES; X1-IS AN ACID ANION AND N IS 1 OR 2, AND AT LEAST ONE SENSITIZING DYE REPRESENTED BY THE FOLLOWING FORMULA II: (-Z3-N(+)(-R3)=)>C-CH=C(-R5)-CH=C<(-Z4-N(-R4)-) (X2(-))(M-1) IN WHICH R5 IS AN ALKYL GROUP HAVING FROM 1 TO 4 CARBON ATOMS; R3 AND R4, WHICH MAY BE THE SAME OR DIFFERENT, EACH REPRESENTS AN ALKYL GROUP, AN ALLYL GROUP AND AN ALKYL GROUP SUBSTITUTED BY HYDROXY, ALKOXY, CARBOXY, SULFO OR MIXTURES THEREOF; A3 AND Z4, WHICH MAY BE THE SAME OR DIFFERENT, EACH REPRESENTS A NON-METALLIC ATOMIC GROUP NECESSARY TO COMPLETE A BENZOTHIAZOLE OR A BENZOSELENAZOLE NUCLEUS, WHICH MAY BE SUBSTITUTED BY HALOGEN, PHENYL, ALKOXPHENYL, HYDROXYPHENYL, CARBOXYPHENYL, AN ALKYL HAVING FROM 1 TO 4 CARBON ATOMS, HYDROXYL, ALKOXY, CARBOXYL, CARBOXYLIC ACID ESTER, CARBAMOYL OR ALKYL CARBAMOYL GROUPS; X2 IS AN ACID ANION AND M IS 1 OR2.

Inventors

• 👤 Keisuke Shiba
• 👤 Motohiko Tsubota
• 👤 Akira Sato
• 👤 Tadashi Ikeda
• 👤 Akira Ogawa

Bibliographic Details