School of Chemistry and Chemical Engineering, Shanxi Datong University, Datong, 037009, P. R. China.
Shenzhen Key Laboratory of Polymer Science and Technology, Guangdong Research Center for Interfacial Engineering of Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518055, P. R. China.
Chem Asian J. 2022 Jan 3;17(1):e202101135. doi: 10.1002/asia.202101135. Epub 2021 Nov 29.
Functional supramolecular gel materials have potential applications in sensors, optical switches, artificial antennae, drug delivery and so on. In this paper, quinoline-cored poly(aryl ether) dendritic organogelators were designed, synthesized and fully characterized. The gelation behaviour of the dendritic organogelator was tested in organic solvents, mixed solvents and ionic liquids. The dendron Q-G1 was found to be an efficient and versatile organogelator toward various apolar and polar organic solvents with the critical gelation concentrations (CGCs) approaching 1.2×10 mol/L, indicating one dendritic organogelator could immobilize 1.2×10 solvent molecules in the organogel network. Interestingly, these dendrons exhibited excellent gel formation in ionic liquids. Notably, these dendritic organogels were found to display multiple stimuli-responsive properties toward external stimuli including heat, ultrasound and shear stress, with a reversible sol-gel phase transition. In addition, the dendritic organogel could effectively adsorb heavy metals and organic dyes. The removal rate of Pb was up to 20% and the adsorption rate for Rhodamine B was as high as 89%.
功能超分子凝胶材料在传感器、光开关、人工天线、药物传递等方面具有潜在的应用。本文设计、合成并充分表征了以喹啉为核的聚（芳基醚）树枝状有机凝胶剂。测试了树枝状有机凝胶剂在有机溶剂、混合溶剂和离子液体中的凝胶行为。发现树枝 Q-G1 是一种高效、通用的有机凝胶剂，对各种非极性和极性有机溶剂都有很好的效果，其临界凝胶浓度（CGC）接近 1.2×10-2mol/L，表明一个树枝状有机凝胶剂可以在有机凝胶网络中固定 1.2×10-2 个溶剂分子。有趣的是，这些树枝在离子液体中也能很好地形成凝胶。值得注意的是，这些树枝状有机凝胶对包括热、超声和剪切应力在内的外部刺激表现出多种刺激响应特性，具有可逆的溶胶-凝胶相转变。此外，树枝状有机凝胶还可以有效地吸附重金属和有机染料。Pb 的去除率高达 20%，Rhodamine B 的吸附率高达 89%。
