Emerging specific selectivity towards mercury(II) cations in water through supramolecular assembly at interfaces
作者:Elizaveta V. Ermakova、Alexander V. Shokurov、Carlo Menon、Julien Michalak、Alla Bessmertnykh-Lemeune、Aslan Yu. Tsivadze、Vladimir V. Arslanov
DOI:10.1016/j.dyepig.2022.110581
日期:2022.10
films, in which chemosensor molecules are assembled in highly ordered supramolecular systems, display a higher selectivity as compared to that of disordered molecular systems. Ultra-thin sensory film allows for the selective detection of the Hg2+ions in water when their concentration is exceeded 0.01 μM, which corresponds to the action level for Hg2+ ions in drinking water recommended by the U.S. Environmental
这项工作涉及超薄膜纳米传感器的开发,用于选择性和灵敏地检测水介质中的有毒 Hg 2+阳离子。1,8-双[(2-氨基乙基)氨基]蒽醌D0被不同长度的烷氧基官能化,制备了两个多胺受体和两个亲脂性烷基链线性排列的配体D3和D12 。化学传感器D0仅结合水/甲醇 (1:1 v/v) 溶液中的铜 (II) 和汞 (II) 阳离子,不受其他金属阳离子的干扰。在固体载体上形成 Langmuir 单分子层和超薄膜所需的蒽醌支架中引入烷氧基不会改变蒽醌D0的传感特性。与没有特定分子顺序的系统(即溶液和流延薄膜)相比,Langmuir 单分子层和烷氧基取代配体的超薄 Langmuir-Blodgett 薄膜仅选择性地结合汞 (II) 阳离子,即使在铜 (II) 离子和 10 种其他干扰阳离子存在的情况下也是如此。汞(II)阳离子的选择性结合通过紫外-可见吸收和 X 射线荧光光谱证实。因此,与无序分子系统相比,