Electricallly photosensitive materials for photoelectrophoretic (PEP) imaging processes. There is a continuing effort to find materials which possess useful levels of electrical photosensitivity and exhibit good colorant properties including neutral or near neutral coloration. Symmetric or asymmetric merocyanine-cyanine-merocyanine compounds of the general formula provide these materials: IMAGE wherein all moieties below are the same or different: m and n are 0,1 or 2; t and u are 0 or 1; p is 0, 1 or 2; R1 and R11 are alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic or, when taken together and p is 0, are a one-or two-carbon alkylene bridge; R2 and R22 are alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic; R3 and R33 are hydrogen or alkyl; R4 and R44 are hydrogen or alkyl; R4, taken together with R2 and t is 0, and R44, taken together with R22 and u is 0, form an alkylene or heteroalkylene bridge; R3 and R4 and R33 and R44, taken together, form an alkylene or heteroalkylene bridge; R5, R6 and R7 are hydrogen or alkyl or, taken individually together with R1 or R11, form an alkylene or heteroalkylene bridge; Y and Y1 complete a basic heterocyclic cyanine dye nucleus; A and A1 are oxygen, sulfur, selenium or -NR8 wherein R8 is alkyl, aryl, aralkyl, alkaryl, carbocyclic or heterocyclic.
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机译：用于光电电泳（PEP）成像过程的电光敏材料。人们一直在努力寻找具有有用的电光敏性水平并显示出良好的着色剂性能的材料，包括中性或接近中性的着色。通式的对称或不对称的花菁-花青-花青素化合物提供以下材料：，其中以下所有部分相同或不同：m和n为0.1或2; t和u为0或1; p是0、1或2; R 1和R 11为烷基，芳基，芳烷基，烷芳基，碳环或杂环基，或当合在一起且p为0时，为一或二碳亚烷基桥; R 2和R 22为烷基，芳基，芳烷基，烷芳基，碳环或杂环; R 3和R 33为氢或烷基; R 4和R 44为氢或烷基; R 4与R 2和t一起为0，R 44与R 22和u为0时，形成亚烷基或杂亚烷基桥。 R 3和R 4和R 33和R 44一起形成亚烷基或杂亚烷基桥; R 5，R 6和R 7为氢或烷基，或分别与R 1或R 11一起形成亚烷基或杂亚烷基桥; Y和Y 1完善了基本的杂环花菁染料核; A和A 1为氧，硫，硒或-NR 8，其中R 8为烷基，芳基，芳烷基，烷芳基，碳环或杂环。
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