Synthesis, structure, and UV–VIS absorption spectra of azo dyes derived from (dialkylamino)thiazole dimers †
作者:Jae Joon Kim、Kazumasa Funabiki、Hiroshige Muramatsu、Katsuyoshi Shibata、Sung Hoon Kim、Hisayoshi Shiozaki、Horst Hartmann、Masaki Matsui
DOI:10.1039/b006991o
日期:——
(Dialkylamino)thiazole dimers act as very strong electron-donating coupling components in azo dyes, the first and second UV–VIS absorption bands of which were observed at λ = 568–737 (ε = 24000–88000) and 404–475 (ε = 9200–52000) nm in dichloromethane, respectively. The azo compounds derived from the (dialkylamino)thiazole dimers having very strong electron-withdrawing moieties such as 4-(perfluoroalkylsulfonyl)phenyls
(二烷基氨基)噻唑二聚体是偶氮染料中非常强的给电子耦合组分,在λ = 568–737(ε = 24000-88000)和404–475(ε时观察到其第一和第二个UV-VIS吸收带 分别在二氯甲烷中= 9200–52000)nm。衍生自具有非常强的吸电子部分的(二烷基氨基)噻唑二聚体的偶氮化合物,例如4-(全氟烷基磺酰基)苯基,2,4-二硝基苯基和噻唑-2-基,表现出负溶剂溶变色。这是中性偶氮染料中负溶剂变色现象的第一个例子。