| 摘要 |
PCT No. PCT/US82/01133 Sec. 371 Date Feb. 22, 1983 Sec. 102(e) Date Feb. 22, 1983 PCT Filed Aug. 23, 1982 PCT Pub. No. WO83/00752 PCT Pub. Date Mar. 3, 1983.Electrically photosensitive complex cyanine colorant compounds, each comprising two merocyanine moieties joined by a cyanine moiety, are useful in electrically photosensitive materials for photoelectrophoretic (PEP) imaging processes. These compounds are symmetric or asymmetric and contain the structure: <IMAGE> I <IMAGE> wherein: m and n, which are the same or different, are 0, 1 or 2; t and u, which are the same or different, are 0 or 1; p is 0, 1 or 2; R1 and R11, which are the same or different, represent an alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic group or, when taken together and p is zero, are a one- or two-carbon alkylene bridge; R2 and R22, which are the same or different represent an alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic group; R3 and R33, which are the same or different, represent hydrogen or an alkyl group; R4 and R44, which are the same or different, represent hydrogen or an alkyl group; R4, which when taken together with R2 and t is 0, and R44, which when taken together with R22 and u is 0, represent the atoms necessary to complete an alkylene or heteroalkylene bridge; R3 and R4, and R33 and R44, when taken together, represent the atoms necessary to complete an alkylene or heteroalkylene bridge; R5, R6 and R7, which are the same or different, represent hydrogen or an alkyl group or, when individually taken together with R1 or R11, represent the atoms necessary to complete an alkylene or heteroalkylene bridge; and Y and Y', which are the same or different, represent the atoms necessary to complete a basic heterocyclic cyanine dye nucleus; and A and A1, which are the same or different, represent oxygen, sulfur, selenium or -NR4 wherein R8 represents an alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic group.
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