A new monopyrrolotetrathiafulvalene-based derivative containing a urea group was designed, synthesized and thoroughly characterized. It proved to be a non-gelator in a single solvent even when heated or sonicated. However, it could self-assemble in a CHCl3 (CH2 Cl2 )/n-hexane mixture to form a thermo-responsive supramolecular organogel. SEM, FT-IR spectroscopy, UV/Vis absorption spectroscopy, and SAXS revealed that in the organogel system, the gelators self-assembled into supramolecular networks with a J-type aggregation mode under the joint effect of π-π stacking, intermolecular hydrogen-bonding, and van der Waals forces. Interestingly, the gel phase was shown to undergo reversible gel-sol transformation induced by Fe3+ -Vitamin C (Vc), trifluoroacetic acid-triethylamine (TFA-TEA) and picric acid (PA)-NaOH. In particular, in the presence of picric acid, the experimental results proposed that charge transfer occurred from the electron-donor gelator to the electron-acceptor picric acid due to the possibility of complex formation. Furthermore, the formed organogel could behave as the matrix for encapsulating cationic fluorescent dye from wastewater, and the adsorption efficiency was directly proportional to the concentration of the gelator.

中文翻译：

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由尿素修饰的单吡咯并四硫富瓦烯衍生物的自组装形成的凝胶显示罗丹明B的多刺激响应和吸收。

设计，合成并充分表征了一种新的含有脲基的单吡咯并四硫富瓦烯基衍生物。事实证明，即使在加热或超声处理时，它也不会在单一溶剂中成为非胶凝剂。但是，它可以在CHCl3（CH2 Cl2）/正己烷混合物中自组装形成热响应性超分子有机凝胶。SEM，FT-IR光谱，UV / Vis吸收光谱和SAXS表明，在有机凝胶体系中，胶凝剂在π-π堆积，分子间氢原子-氢键的联合作用下，以J型聚集模式自组装成超分子网络。键合和范德华力。有趣的是，显示出凝胶相经历了Fe3 +-维生素C（Vc），三氟乙酸-三乙胺（TFA-TEA）和苦味酸（PA）-NaOH诱导的可逆凝胶-溶胶转化。尤其是，在苦味酸存在下，实验结果表明，由于可能形成络合物，电荷从电子供体胶凝剂转移至电子受体苦味酸。此外，所形成的有机凝胶可作为从废水中包封阳离子荧光染料的基质，其吸附效率与凝胶剂的浓度成正比。