Photographic elements containing particular sensitizing dyes

Radiation imagery chemistry: process – composition – or product th – Radiation sensitive product – Silver compound sensitizer containing

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430584, 430587, 430594, G03C 112

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active

054647363

ABSTRACT:
A photographic element having a silver halide emulsion sensitized by dye of the formula I: ##STR1## wherein: R.sup.1 represents a substituted or unsubstituted aromatic or heteroaromatic group, a substituted or unsubstituted alkyl or H;
R.sup.2 represents a substituted or unsubstituted alkyl, alkenyl, aryl, aralkyl, or H;
E.sup.1 represents an electron withdrawing group;
Z represents the non-metallic atoms required to complete a substituted or unsubstituted ring system containing at least one 5- or 6-membered heterocyclic nucleus;
L.sup.1, L.sup.2, L.sup.5 and L.sup.6 independently represent a substituted or unsubstituted methine;
m may be 0, 1, 2 or 3;
n may be 0 or 1.

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Chemical Abstract 130793r, vol. 109, No. 16, 17 Oct. 1988.

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