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,其化学式如下(I):其中R1代表烷基、芳基或杂环基;R2和R3各自独立地代表氢原子或与R1具有相同的含义,或可以耦合在一起形成环;L1和L2各自独立地代表亚甲基基团或氮原子;L3和L4各自独立地代表亚甲基基团;Z代表形成5-或6-成员杂环所必需的原子团;m代表0或1;Y代表氧、硫、硒或碲原子;A代表氢原子或可通过溶液处理消除的基团;V代表一价基团;p代表0、1、2或3;X代表一个计数离子;n代表分子中中性化电子电荷所需的大于等于0的数字。本发明的可脱色染料在储存期间保持稳定的着色状态,但在溶液处理后变为无色。