Responsive polymers-based dual fluorescent chemosensors for Zn2+ ions and temperatures working in purely aqueous media.

摘要: We report on the fabrication of responsive double hydrophilic block copolymers (DHBCs)-based dual fluorescent chemosensors for Zn2+ ions and temperatures investigate effects thermo-induced micellization detection conditions probing sensitivity binding reversibility ions. A novel quinoline-based polarity-sensitive Zn2+-recognizing monomer (ZQMA, 6) was synthesized at first. Well-defined DHBCs bearing moieties (ZQMA) in thermoresponsive block, PEG-b-P(MEO2MA-co-OEGMA-co-ZQMA), were via reversible addition−fragmentation chain transfer (RAFT) polymerization 2-(2-methoxyethoxy)ethyl methacrylate (MEO2MA), oligo(ethylene glycol) monomethyl ether (OEGMA), ZQMA presence PEG-based macroRAFT agent. The OEGMA contents varied range 0−12.0 mol % to tune their lower critical solution (LCSTs). At 20 °C, almost nonfluorescent PEG-b-P(MEO2MA-c...