申请人:Fuji Photo Film Co., Ltd.
公开号:US06197968B1
公开(公告)日:2001-03-06
Described is a decolorizable dye represented by the following formula (I):
wherein R1 represents an alkyl, aryl or heterocyclic group; R2 and R3 independently each represents a hydrogen atom or has the same meaning as R1 or may be coupled together to form a ring; L1 and L2 independently each represents a methine group or a nitrogen atom; L3 and L4 independently each represents a methine group; Z represents an atomic group necessary for the formation of a 5- or 6-membered hetero ring; m stands for 0 or 1; Y represents an oxygen, sulfur, selenium or tellurium atom; A represents a hydrogen atom or a group eliminative by solution treatment; V stands for a monovalent group; p stands for 0, 1, 2 or 3, X represents a counterion, and n stands for a numeral of 0 or greater necessary for the neutralization of an electron charge in the molecule. The decolorizable dye according to the present invention retains stable color forming condition during storage but becomes colorless rightly after solution treatment.
描述了一种可脱色染料,其化学式为(I):其中R1代表烷基,芳基或杂环基;R2和R3独立地表示氢原子或具有与R1相同的含义,或可以耦合在一起形成环;L1和L2独立地表示甲烷基或氮原子;L3和L4独立地表示甲烷基;Z表示形成5或6元杂环所必需的原子基团;m代表0或1;Y表示氧,硫,硒或碲原子;A表示氢原子或通过溶液处理消除的基团;V代表单价基团;p代表0,1,2或3,X表示一个计数离子,n代表分子中中性化电子电荷所必需的数字0或更大。本发明的可脱色染料在储存过程中保持稳定的着色状态,但在溶液处理后变为无色。