Colour photographic recording materials

摘要

Photographic recording materials with a light sensitive silver halide emulsion layer that is spectrally sensitised with a monomethinecyanine dye of formula (I) is new. In (I), R<1> = a benzthiophene residue bonded to the benzene ring of the benzthiazole group at a 2-, 3-, 4-, 5- 6- or 7- position; R<2> and R<3> = sulphoalkyl, carboxyalkyl, -(CH2)n-SO2-NH-SO2-alkyl, -(CH2)n-SO2-NH-CO-alkyl, -(CH2)n-CO-NH-SO2-alkyl or -(CH2)n-CO-NH-CO-alkyl; n = 1-6; R<4> - R<6> = H, halogen, -CN, -CF3, alkyl, alkoxy, aryl or heterocyclic group, or R<5> together with R<4> or R<6> may complete an optionally substituted, condensed-on benzene or naphthalene ring; and M = a charge-balancing cation.