Dyes containing an isoindole nucleus

Details Dyes containing an isoindole nucleus Dyes containing an isoindole nucleus

C - Chemistry, Metallurgy

09

B

96/117, 260/382,

C09B 23/00 (2006.01) C09B 23/01 (2006.01) C09B 57/04 (2006.01) G03C 1/12 (2006.01) G03C 1/22 (2006.01)

Patent

CA 1059130

ABSTRACT OF THE DISCLOSURE Novel sensitizing dyes containing isoindole nuclei represented by the formula Image wherein R is an alkyl or substituted alkyl group; Q1 is a methine chain having an odd number of carbon atoms terminated with a nitrogen atom contained in a basic heterocyclic nucleus of the type used in cyanine dyes; D1 is a halogen atom, an alkoxy group, or a methine chain having an even number of carbon atoms terminated with a nitrogen atom contained in a basic heterocyclic nucleus of the type used in cyanine dyes; and X? represents an anion. These dyes can be used as spectral sensitizers for silver halide emulsions.

236084

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