A 6-tertiary amino-2-(Z=CH-)benzofuran dye is disclosed, where Z represents the atoms providing an electron withdrawing group and a conjugated methine linkage completing a resonant dye chromophore including the 6-tertiary amino group as an electron donor and the electron withdrawing group as an electron acceptor. The dyes are formed by condensing a 6-tertiary amino-2-formylbenzofuran with an electron withdrawing dye nucleus precursor containing an active methyl or methylene site. The dyes exhibit bathochromically shifted absorption peaks.
本发明公开了一种 6-叔
氨基-2-(Z=CH-)
苯并呋喃染料,其中 Z 代表提供电子撤回基团和共轭甲基连接的原子,完成共振
染料发色团,包括作为电子供体的 6-叔
氨基和作为电子受体的电子撤回基团。这些
染料是由 6-叔
氨基-2-甲酰基
苯并呋喃与含有活性甲基或亚甲基位点的电子汲取
染料核前驱体缩合而成。这些
染料表现出浴色偏移吸收峰。