A single platform for dual applications of metal-ion sensing and extraction with recyclability is a desirable system for sustainable environmental remediation. However, considering these two function’s contradictory requirements, a single organic platform fails to satisfy both of the operations simultaneously. In this work, a new approach was adopted to bring out synergy in dual functional activity by a single ionic-liquid-based platform, where new fluorogenic task-specific ionic liquids (TSILs) with the same cationic motif were used to derive both hydrophilic (TSIL_1-3 with Br^– anion) and hydrophobic ionic liquids (TSIL_4-6 with NTf₂^– anion) for the dual functions. The hydrophilic ionic liquids were used for fluorescence sensing studies in a pure aqueous system, which shows selectivity for several metal ions (Cu²⁺, Fe³⁺, Pd²⁺, Ru³⁺, and Zn²⁺) with significantly lower limit of detection (LOD) values. The corresponding hydrophobic ionic liquids were used for bulk extraction studies with very high extraction efficiencies, which can be recycled easily. As an application, hydrophilic TSILs were used for biosensing of metal ions in living marine organisms like Artemia salina through in vivo bioimaging. The high affinity for ferric ion prompted us to evaluate the antibacterial activities of TSILs. The minimum inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of the TSIL₂ and TSIL₃ show better antibacterial activity against eight pathogenic bacteria than the standard antibiotic ampicillin. This approach will be helpful in deriving dual applications of organic fluorophores with sustainability.

中文翻译：

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传感与提取：功能化离子液体作为具有生物学意义的双重应用的单一平台

具有可回收性的金属离子传感和提取双重应用的单一平台是可持续环境修复的理想系统。然而，考虑到这两个功能的矛盾需求，单一的有机平台无法同时满足这两种操作。在这项工作中，采用了一种新方法通过基于单一离子液体的平台在双重功能活性中发挥协同作用，其中使用具有相同阳离子基序的新型荧光任务特异性离子液体 (TSIL) 来获得亲水性（ TSIL _1-3 with Br ^–阴离子）和疏水性离子液体（TSIL _4-6 with NTf ₂ ^–阴离子）的双重功能。亲水性离子液体用于纯水体系中的荧光传感研究，显示出对几种金属离子（Cu ²⁺、Fe ³⁺、Pd ²⁺、Ru ³⁺和 Zn ²⁺）的选择性，显着下限为检测 (LOD) 值。相应的疏水性离子液体用于批量提取研究，提取效率非常高，易于回收。作为一种应用，亲水性 TSIL 被用于通过体内生物传感活海洋生物（如卤虫）中的金属离子生物成像。对铁离子的高亲和力促使我们评估 TSIL 的抗菌活性。TSIL ₂和 TSIL ₃的最低抑菌浓度 (MIC) 和最低杀菌浓度 (MBC)显示出比标准抗生素氨苄青霉素更好的对八种病原菌的抗菌活性。这种方法将有助于推导出具有可持续性的有机荧光团的双重应用。