Patent ID: 6521395
Filing Date: 2003-02-18
Classification: G03C,Y10S

Abstract:
A photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a phenolic infrared dye-forming coupler that forms a dye for which the &lgr;max using spin-coating is shifted towards the infrared region of the spectrum by at least 30 nm, compared to that of the same dye in solution form, to a value of at least 700 nm and having the formula (I): wherein:R1 is hydrogen, alkyl, alkoxy, carbocyclic or heterocyclic group; each Zâ€² and Z* is an independently selected substituent group where n is 0 to 3 and p is 0 to 2; Y is H or a coupling-off group; W1 represents the atoms necessary to complete a carbocyclic or heterocyclic ring group; provided that when W1 is a carbocyclic group at least one Zâ€² is a sulfonyl group provided further that when W1 is a carbocyclic group there is zero or only one Zâ€² ortho to the carbonamido group linking the W1 ring to the rest of the coupler; and provided still further that the combined sum of the aliphatic carbon atoms in R1, all Zâ€² and Z* is at least 8.