Zeromethine merocyanine dyes useful as spectral sensitizers in p

Details Zeromethine merocyanine dyes useful as spectral sensitizers in p Zeromethine merocyanine dyes useful as spectral sensitizers in p

1996-11-12

1997-11-25

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Silver compound sensitizer containing

430591, 430502, 430966, G03C 110

Patent

active

056911297

ABSTRACT:
The present invention is directed to a dye suitable for spectral sensitization of a photographic element. Specifically, the dye is a compound having the structure: ##STR1## wherein: R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each independently represents H; halogen; alkyl of 1-6 carbons; aryl of 6-24 carbons; alkoxy of 1-6 carbons; carbonyl; or sulfonate; or R.sup.1 and R.sup.2, R.sup.2 and R.sup.3, or R.sup.3 and R.sup.4 taken together represent the atoms necessary to complete a six-membered carbocylic ring;

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CA111:87274z Novel Sensitizer Dye using Silver Halide Photographic Material, Onda et al., p. 632, 1989.

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