作者:Mi-Rae Kim、Muchchintala Maheswara、Jung-Yun Do
DOI:10.5012/bkcs.2011.32.2.664
日期:2011.2.20
A series of hydrophilic chromophores was synthesized through introduction of dendritic sulfonate anions using click chemistry. A dendron structure bearing several sulfonate groups enhances hydrophilicity of attached chromophores. A click triazole formation connects chromophores with hydrophilic groups. A neutral trichloroethyl sulfonate has versatile features such as easy introduction, chemical endurance for isolation or storage, and convenient transformation to a hydrophilic anion. Zinc and OH mediated cleavage of trichloroethyl group from the neutral sulfonate undergoes to generate a water-soluble sulfonate anion. The solubility was examined with different counter cations and in different pH media and thus increased with the number of attached sulfonate ion. Two hydrophilic chromophores of stilbene-derived and azobenzene-derived dipolar structures exhibit clear negative and positive solvatochromism in protic solvents, respectively.
通过点击化学引入树枝状磺酸盐阴离子,合成了一系列亲水性发色团。具有多个磺酸基团的树枝状结构增强了附着发色团的亲水性。点击三唑形成将发色团与亲水基团连接。三氯乙基磺酸中性盐具有多种特性,如易于引入、耐化学性以分离或储存,以及方便转化为亲水性阴离子。锌和羟基介导的中性磺酸盐上的三氯乙基断裂,产生水溶性磺酸盐阴离子。在不同反离子和不同pH介质中检验了溶解度,因此随着附着的磺酸离子数量的增加而提高。两种亲水性发色团,即芪衍生和偶氮苯衍生偶极结构,分别在质子溶剂中表现出明显的负向和正向溶剂化变色效应。