Synthesis and properties of new polymethine dyes based on bis-dimethylaminophenylethylene moiety
Synthesis and properties of new polymethine dyes based on bis-dimethylaminophenylethylene moiety
复制标题
双二甲氨基苯基新型聚次甲基染料的合成及性能
DOI：
10.1016/j.dyepig.2005.09.010
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发表时间：
2007
影响因子：
4.5
通讯作者：
Sung
中科院分区：
文献类型：
--
作者：
Y. Son;Sung
聚甲基染料作为有机着色剂在高科技领域具有潜在的应用前景，因此备受关注。本文研究了由4,4′-乙烯基双（N，N-二甲基苯胺）1与4-二苯基氨基苯甲醛2和N-乙基咔唑-3-甲醛4两种醛反应合成的一类新的聚甲基染料3和5。双二甲氨基苯乙烯基甲基染料在600 ~ 700nm范围内具有较宽的吸收光谱和较高的摩尔消光系数，最大吸收光谱分别在650 nm和647nm处。在酸的作用下，出现了由无色型转化为可逆彩色型的吸收光谱。
Polymethine dyes have attracted much attention due to their potential functions for high-tech uses as organic colorants. The work herein comprises an investigation of a new class of polymethine dyes 3 and 5 which have been synthesized by the reaction of 4,4′-vinylidenebis(N,N-dimethylaniline) 1 with two aldehydes such as 4-diphenylaminobenzaldehyde 2 and N-ethylcarbazole-3-carboxaldehyde 4. Both methine dyes based on bis-dimethylaminophenylethylene moiety showed broad absorption spectra with high molar extinction coefficient in the range of 600–700nm and their maximum absorption spectra were exhibited at 650 and 647nm, respectively. The absorption spectra of the reversible colored form which converted from leuco form appeared with addition of acid.