| 摘要 |
A cpd. of formula (I) which releases a diffusible dye by a redox reaction is new, where CAR is organic carrier gp. which can undergo a redox reaction and opt. contains a ballasting gp. which prevents the cpd. diffusing in wet alkaline conditions, L is gp. clearable or releasable from CAR by a redox reaction securing as a function of Ag halide development, G = bridging gp., L1-2 = linking gp.; PUG1 = dye (precursor); PUG2 = dye (precursor) (same or different to PUG1), UV absorber or singlet oxygen scavenger gp. Also claimed ina photorgraphic material contg. the cpd. ina Ag halide emulsion layer.
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