Cholesterol-based diazine derivative: selective sensing of Ag+ and Fe3+ ions through gelation and the performance of metallogels in dye and picric acid adsorption from water†,Materials Chemistry Frontiers

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Cholesterol-based diazine derivative: selective sensing of Ag+ and Fe3+ ions through gelation and the performance of metallogels in dye and picric acid adsorption from water†
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2018-10-04 00:00:00 , DOI: 10.1039/c8qm00433a
Atanu Panja _{1,

2,

3,

4} , Kumaresh Ghosh _{1,

2,

3,

4}

Affiliation

Cholesterol appended diazine derivative 1 on a 4-hydroxybenzaldehyde scaffold has been designed and synthesized. The compound having diazine as a metal ion binding site forms nice gels with Ag⁺ and Fe³⁺ ions over a series of other metal ions from CHCl₃/CH₃OH (3 : 1, v/v). Strong hydrophobic interaction owing to the presence of cholesterol has a marked contribution in aggregation. The SEM image reveals fibrillar to globular porous microstructures. The true nature of the gels is determined from a rheological study. The Ag⁺ and Fe³⁺-gels are distinguishable with the aid of tetrabutylammonium chloride, tetrabutylammonium bromide or fluoride and ammonium thiocyanate. There is no interference of Fe²⁺ ions in the detection of Fe³⁺ ions. The presence of Fe²⁺ ions in solution can successfully be ascertained through gelation of 1 in the specified solvent upon adding external oxidising agents such as m-CPBA. As an application, both the Ag⁺- and Fe³⁺-gels of 1 act as good adsorbents for adsorption of uranine dye and picric acid from aqueous solution. In this process, the metallogels are recyclable and exhibit excellent efficiency.

中文翻译：

基于胆固醇的二嗪衍生物：通过胶凝作用选择性地感测Ag ⁺和Fe ³⁺离子，以及金属染料在染料和苦味酸从水中吸附时的性能†

设计并合成了在4-羟基苯甲醛支架上的胆固醇附加的二嗪衍生物1。具有二嗪作为金属离子结合位点的化合物与来自CHCl ₃ / CH ₃ OH（3：1，v / v）的一系列其他金属离子形成的Ag ⁺和Fe ³⁺离子形成良好的凝胶。由于胆固醇的存在，强烈的疏水性相互作用在聚集中具有显着的贡献。SEM图像揭示了从原纤维到球状的多孔微结构。凝胶的真实性质由流变学研究确定。Ag ⁺和Fe ³⁺借助四丁基氯化铵，四丁基溴化铵或氟化物和硫氰酸铵可以区分β-凝胶。Fe ³⁺离子的检测中没有Fe ²⁺离子的干扰。通过添加特定的溶剂（例如m- CPBA），在指定的溶剂中1发生胶凝，可以成功地确定溶液中Fe ²⁺离子的存在。作为一种应用，Ag ⁺ -和Fe ³⁺ -凝胶均为1，可作为从水溶液中吸附尿嘧啶染料和苦味酸的良好吸附剂。在该过程中，金属盐是可回收的，并且显示出优异的效率。

更新日期：2018-10-04

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