Cao Wei, Tan Liangxiao, Wang Hong, Yuan Jiayin
Department of Materials and Environmental Chemistry, Stockholm University, Stockholm 10691, Sweden.
Key Laboratory of Functional Polymer Materials, Ministry of Education), Institute of Polymer Chemistry, College of chemistry, Nankai University, Tianjin 300071, People's Republic of China.
ACS Macro Lett. 2021 Jan 19;10(1):161-166. doi: 10.1021/acsmacrolett.0c00784. Epub 2021 Jan 8.
Both imidazolium and 1,2,4-triazolium cations are important functional moieties widely incorporated as building blocks in poly(ionic liquid)s (PILs). In a classical model, a PIL usually contains either imidazolium or 1,2,4-triazolium in its repeating unit. Herein, via exploiting the slight reactivity difference of alkyl bromide with imidazole and 1,2,4-triazole at room temperature, we synthesized dual-cationic PIL homopolymers carrying both imidazolium and 1,2,4-triazolium moieties in the same repeating unit, that is, an asymmetrically dicationic unit. We investigated their fundamental properties, for example, thermal stability and solubility, as well as their unique function in forming supramolecular porous membranes via a water-initiated phase-separation and cross-linking process. With such knowledge, we identified a water-based fabricate strategy toward air-stable porous membranes from single-component PILs. This study will enrich the design tools and chemical structure library of PILs and expand their application spectrum.
咪唑鎓阳离子和1,2,4-三唑鎓阳离子都是重要的功能基团，它们作为构建单元被广泛引入聚离子液体（PILs）中。在经典模型中，PIL的重复单元通常只包含咪唑鎓或1,2,4-三唑鎓。在此，通过利用室温下溴代烷与咪唑和1,2,4-三唑反应活性的细微差异，我们合成了在同一重复单元中同时含有咪唑鎓和1,2,4-三唑鎓基团的双阳离子PIL均聚物，即不对称双阳离子单元。我们研究了它们的基本性质，如热稳定性和溶解性，以及它们在通过水引发的相分离和交联过程形成超分子多孔膜中的独特功能。基于这些认识，我们确定了一种从单组分PIL制备空气稳定多孔膜的水基制备策略。这项研究将丰富PIL的设计工具和化学结构库，并拓展其应用范围。
