Patent ID: 6251575
Filing Date: 2001-06-26
Classification: C07C,C07D,G03C

Abstract:
A photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a ""NB coupler"" having the formula (I): ##STR28##whereinthe 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;Y is H or a coupling-off group;each Z* is an independently selected substituent group where p is 0 to 2;V is a substituent group containing a sulfone group;R.sub.4 is represented by the formula ##STR29##wherein each of R.sub.5, R.sub.6 and R.sub.7 is hydrogen or an independently selected substituent with no more than one being hydrogen;provided that two or more of R.sub.5, R.sub.6 and R.sub.7 may join to form a ring or rings, and provided that the combined sum of the aliphatic carbon atoms in V, R.sub.4 and all Z* is at least 8, and provided further that R.sub.4 is not a fully fluorinated alkyl group.