The Ultrafast Assembly of a Dipeptide Supramolecular Organogel and its Phase Transition from Gel to Crystal
The Ultrafast Assembly of a Dipeptide Supramolecular Organogel and its Phase Transition from Gel to Crystal
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二肽超分子有机凝胶的超快组装及其从凝胶到晶体的相变
DOI：
10.1002/anie.201903829
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Li Junbai
中科院分区：
文献类型：
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作者：
Yuan Tingting;Xu Youqian;Fei Jinbo;Xue Huimin;Li Xianbao;Wang Chenlei;Fytas George;Li Junbai
二肽超分子组装体的凝胶到晶体的相变调节了油中活泼的水的传输。在超快组装二肽有机凝胶中加入水可以诱导二肽分子排列从片状到六方结构的转变。因此，发生了从凝胶到晶体的相变，进而水通过明确的通道在二肽晶体中传输。在宏观尺度上，水在块体系统中的输运表现出各向异性特征，这可以通过Hofmeister系列离子的存在来调节。这些有利的特性使分散的纳米颗粒能够自动从水溶液中的溶解电解质中分离出来。这些发现证明了这种组装系统在没有外部压力的情况下进行主动过滤的潜力。
A gel‐to‐crystal phase transition of a dipeptide supramolecular assembly mediates active water transportation in oils. The addition of water into ultrafast‐assembling dipeptide organogels can induce a lamellar‐to‐hexagonal structural transformation of dipeptide molecular arrangement. Consequently, a phase transition from gel to crystal occurs and in turn water is transported in the dipeptide crystal via well‐defined channels. On a macroscopic scale, water transport in the bulk system exhibits an anisotropic characteristic, which can be tuned by the presence of ions in the Hofmeister series. These favorable features enable the automatic separation of dispersed nanoparticles from dissolved electrolytes in aqueous solution. These findings demonstrate the potential of this assembled system for active filtration without external pressure.