发明授权
US06562558B1 Photographic element, compound, and process 失效
摄影元素,复合和过程

Photographic element, compound, and process
摘要:
Disclosed is a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a cyan “NB coupler” having the formula (I): wherein: the term “NB coupler” represents a coupler of formula (I) that forms a dye for which the left bandwidth (LBW) using spin-coating is at least 5 nm less than that of the same dye in solution form; X is selected from O, NR* or S and R* is an alkyl, carbocyclic or heterocyclic group; L is a linking group and a is 0 or 1; Y is H or a coupling-off group; Z* is a substituent group and p is 0 to 2; and R1 and R2 are independently selected H or substituents; provided that the combined sum of the aliphatic carbon atoms in R1, R2, R*, L and all Z* is at least 8.
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