Cyanine dyes for sensitizing silver halide emulsions to infrared

Details Cyanine dyes for sensitizing silver halide emulsions to infrared Cyanine dyes for sensitizing silver halide emulsions to infrared

1983-06-30

1985-05-07

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430576, 430594, 430595, G03C 102

Patent

active

045158886

ABSTRACT:
Cyanine dyes including two nitrogen containing heterocyclic nuclei, linked to each other through a rigidized conjugated 7, 9 or 11 carbon atom methine chain to form an amidinium-ion resonance system, are very good for sensitizing silver halide emulsions for use in photographic elements to be exposed to infrared radiation if one of said heterocyclic nuclei is 5-methyl-6-methoxy-benzothiazole.

REFERENCES:
patent: 2230257 (1941-02-01), Middleton et al.
patent: 2887479 (1959-05-01), Haseltine
patent: 2984664 (1961-05-01), Fry et al.
patent: 3615632 (1971-10-01), Shiba et al.
patent: 3695888 (1972-10-01), Hiller et al.
patent: 3936308 (1976-02-01), Gaugh et al.
patent: 4011083 (1977-03-01), Durning et al.

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