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首页> 外文期刊>Chemistry: A European journal >Amino Acid Based Low-Molecular-Weight Ionogels as Efficient Dye- Adsorbing Agents and Templates for the Synthesis of TiO2 Nanoparticles
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Amino Acid Based Low-Molecular-Weight Ionogels as Efficient Dye- Adsorbing Agents and Templates for the Synthesis of TiO2 Nanoparticles

机译：氨基酸基低分子量离子凝胶作为高效染料吸附剂和用于合成TiO2纳米粒子的模板

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摘要

The gelation of ionic liquids is attracting significant attention because of its large spectrum of applications across different disciplines. Thesegreen solvents have been the solution to a number of common problems due to their eco-friendly features. To expand their applications, the gelation of ionic liquids has been achieved by using amino acid-based low-molecularweight compounds. Variation of individual segments in the molecular skeleton of the gelators, which comprise the amino acid and the protecting groups at the N and C termini, led to an understanding of the structure–property correlation of the onogelation process.An aromatic ring containing amino acid-based molecules protected with a phenyl or cyclohexyl group at the N terminus were efficient in the gelation of ionic liquids. In the case of aliphatic amino acids, gelation was more prominent with a phenyl group as the N-terminal protecting agent. The probable factors responsible for this supramolecular association of the gelators in ionic liquids have been studied with the help of field-emission SEM,1H NMR, FTIR, and luminescence studies. It is the hydrophilic–lipophilic balance that needs to be optimized for a molecule to induce gelation of the green solvents. Interestingly, to maximize the benefits from using these green solvents, these ionogels have been employed as templates for the synthesis of uniform-sized TiO2 nanoparticles (25–30 nm). Furthermore, as a complement to their applications, ionogels serve as efficient adsorbents of both cationic and anionic dyes and were distinctly better relative to their organogel counterparts.
机译：离子液体的凝胶化因其在不同学科中的广泛应用而备受关注。这些绿色溶剂由于其环保特性而已成为解决许多常见问题的解决方案。为了扩展其应用，已经通过使用基于氨基酸的低分子量化合物实现了离子液体的胶凝。胶凝剂分子骨架中各个部分的变化（包括氨基酸和N和C末端的保护基）使人们对渗凝胶过程的结构与性质相关性有了一个了解。在N末端被苯基或环己基保护的分子，在离子液体的凝胶化方面非常有效。在脂族氨基酸的情况下，以苯基作为N-末端保护剂，凝胶化更加显着。借助于场发射SEM，1H NMR，FTIR和发光研究，已经研究了离子液体中胶凝剂超分子缔合的可能因素。亲水-亲脂平衡需要针对一个分子进行优化以诱导绿色溶剂胶凝。有趣的是，为了最大程度地利用这些绿色溶剂带来的好处，这些离子凝胶已被用作合成均一尺寸的TiO2纳米颗粒（25–30 nm）的模板。此外，作为其应用的补充，离子凝胶可作为阳离子和阴离子染料的有效吸附剂，并且相对于其有机凝胶对应物明显更好。

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