Gupta Ravindra Kumar, Nakanishi Takashi, Payne Daniel T
Research Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki, 305-0044, Japan.
International Center for Young Scientists (ICYS), National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba, Ibaraki, 305-0044, Japan.
Chemistry. 2025 Jun 12;31(33):e202500739. doi: 10.1002/chem.202500739. Epub 2025 May 19.
Functional materials capable of generating singlet oxygen (O), a highly reactive but short-lived species used to destroy organic materials, including chemical pollutants and biological entities, typically incorporate a chromophore that acts as a photosensitizer into a tertiary scaffold. Current functional materials that produce O include metal-organic frameworks (MOFs), covalent-organic frameworks (COFs), polymeric nanoparticles, modified glasses, and supramolecular assemblies. Whilst multi-component functional materials have been widely reported, producing functional materials using a single small molecule in a condensed state has hardly been reported. Herein, we report the first use of functional molecular liquids (alkyl-π liquids), non-volatile single-component condensed-state fluidic materials, as photosensitizers for the generation of O at an alkyl-π liquid-water interface. We investigate the incorporation of various chromophores into alkyl-π liquids that are suitable for O production and analyze the molecular structure required to produce efficient alkyl-π liquid photosensitizers. The alkyl-π liquids were studied, impregnated into porous membranes, and as thin films on quartz and Si wafers, the limitations of O production were investigated. A system was successfully fabricated that can generate O within an alkyl-π liquid impregnated membrane and migrate across a membrane-water interface to destroy small organic molecules, demonstrating the potential of these systems for water decontamination.
能够产生单线态氧（O）的功能材料，单线态氧是一种高反应活性但寿命短暂的物质，用于破坏有机材料，包括化学污染物和生物实体，这类材料通常将充当光敏剂的发色团纳入三级支架中。目前产生O的功能材料包括金属有机框架（MOF）、共价有机框架（COF）、聚合物纳米颗粒、改性玻璃和超分子组装体。虽然多组分功能材料已有广泛报道，但几乎没有关于使用处于凝聚态的单个小分子来制备功能材料的报道。在此，我们报道了首次使用功能分子液体（烷基-π液体），即非挥发性单组分凝聚态流体材料，作为在烷基-π液体-水界面产生O的光敏剂。我们研究了将各种发色团纳入适合产生O的烷基-π液体中，并分析了制备高效烷基-π液体光敏剂所需的分子结构。对烷基-π液体进行了研究，将其浸渍到多孔膜中，并制成石英和硅片上的薄膜，研究了产生O的局限性。成功构建了一个系统，该系统能够在浸渍有烷基-π液体的膜内产生O，并穿过膜-水界面迁移以破坏小分子有机物，证明了这些系统在水净化方面的潜力。
