Department of Chemistry, Faculty of Science, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.
College of Science and Engineering, Aoyama Gakuin University, 5-10-1 Fuchinobe, Chuo-ku, Sagamihara, Kanagawa, 252-5258, Japan.
Chem Asian J. 2017 Aug 17;12(16):2029-2032. doi: 10.1002/asia.201700708. Epub 2017 Jul 12.
The development of an effective adsorbent for cleansing polluted water is required for environmental purification. In this respect, a supramolecular hydrogel constructed by the self-assembly of small molecules could be a strong candidate. Adsorption experiments of organic dyes were performed using supramolecular hydrogels of amphiphilic tris-urea 1. Cationic organic dyes were adsorbed efficiently; indeed, the adsorption of methylene blue was as high as 4.19 mol equivalents relative to 1. Two luminescence peaks were observed in the rhodamine 6G-adsorbed supramolecular hydrogels, and their ratios varied with the amount of dye adsorbed. Fluorescence microscopy images of the supramolecular hydrogel at lower dye levels exhibited fibrous fluorescence consistent with the fibrous aggregates of 1. According to these results, adsorption may proceed gradually, that is, occurring initially on the fibers and later in the aqueous spaces of the supramolecular hydrogel.
为了实现环境净化，需要开发一种用于净化受污染水的有效吸附剂。在这方面，通过小分子的自组装构建的超分子水凝胶可能是一个强有力的候选者。使用两亲性三脲 1 的超分子水凝胶进行了有机染料的吸附实验。阳离子有机染料被有效地吸附；实际上，相对于 1，亚甲蓝的吸附高达 4.19mol 当量。在吸附了罗丹明 6G 的超分子水凝胶中观察到两个荧光峰，并且它们的比值随染料吸附量的变化而变化。在较低染料水平下的超分子水凝胶的荧光显微镜图像显示出与 1 的纤维状聚集物一致的纤维状荧光。根据这些结果，吸附可能逐渐进行，即首先在纤维上发生，然后在超分子水凝胶的水相空间中发生。
