SILVER HALIDE PHOTO EMULSION

摘要

1312105 Carbocyanine dyes FUJI PHOTO FILM CO Ltd 25 Sept 1970 [26 Sept 1969] 45872/70 Heading C4P [Also in Division G2] Carbocyanine dyes have the formulµ wherein Z 1 , Z 2 , Z 3 and Z 4 are each S or Se; R 1 is H or alkyl having 1-8 carbons; W 1 is H, and W 2 is H, halogen, alkyl having 1-8 carbons, alkoxy, aryl or OH, or W 1 and W 2 in combination represent the atoms necessary to complete a benzene ring; R 2 and R 3 are each ethyl, npropyl,γ- sulphopropyl,γ- sulphobutyl, 8- sulphobutyl or allyl; R 4 is ethyl or aryl; W 3 and W 4 are each H, halogen, methyl, methoxy, aryl or OH; R 7 is methyl or ethyl, at least one of W 3 and W 4 being other than H when R 7 is methyl; R 5 and R 6 are each alkyl having 1-8 carbons, allyl or substituted alkyl; X(-) is an anion; and n is 1, or in the case of an intramolecular salt, n is 0. Anhydro-51-carboxy-51- phenyl - 9 - ethyl - 3 - (γ- sulphopropyl)-31- ethyl - dithia - carbocyanine hydroxide is prepared from 5 - phenyl - 3 - ethyl - 2 - thiopropionylmethylene - benzothiazoline and anhydro - 5 - carboxy - 2 - methyl - 3 - (γ- sulphopropyl) - benzothiazolium hydroxide. Many dyes are listed and may be prepared similarly.