| abstract |
(57) [Summary] (Modified) [Object] To provide a leuco-type phenazinium dye, a photothermographic component, a composition, and a method for forming a color developed image by incorporating these leuco components. [Structure] General formula: (Wherein X is; Y is H, and a substituent other than amino or amido; R 1 , R 2 , R 4 and R 10 are independently Selected from the group consisting of H, alkyl, aryl, alkylsulfonyl, arylsulfonyl, alkylcarbonyl, arylcarbonyl; and R 11 is X- Which represents a group that does not interfere with the oxidative cleavage of N-bonds). |