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首页> 外文期刊>Chemistry: A European journal >Double Metal Ions Competitively Control the Guest-Sensing Process: A Facile Approach to Stimuli-Responsive Supramolecular Gels
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Double Metal Ions Competitively Control the Guest-Sensing Process: A Facile Approach to Stimuli-Responsive Supramolecular Gels

机译：双金属离子竞争性地控制来宾传感过程：一种刺激反应的超分子凝胶的简便方法。

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摘要

A facile approach to the design of stimuli-responsive supramolecular gels (SRSGs) termed double-metal-ion competitive coordination control is reported. By this means, the fluorescence signals and guest-selective responsiveness of the SRSGs are controlled by the competitive coordination of two different metal ions with the gelators and the target guest. To demonstrate this approach, a gelator G2 based on multiple self-assembly driving forces was synthesized. G2 could form Ca~(2+)-coordinated metallogel CaG with strong aggregation-induced emission (AIE). Doping of CaG with Cu~(2+) results in AIE quenching of CaG and formation of Ca~(2+) - and Cu~(2+)-based metallogel CaCuG. CaCuG could fluorescently detect CN~- with specific selectivity through the competitive coordination of CN~- with the Cu~(2+) and the coordination of Ca~(2+) with G2 again. This approach may open up routes to novel stimuli-responsive supramolecular materials.
机译：据报道，一种被称为双金属离子竞争性协调控制的刺激反应性超分子凝胶（SRSGs）设计的简便方法。通过这种方式，SRSG的荧光信号和客体选择性响应性受两种不同金属离子与胶凝剂和目标客体竞争性配位的控制。为了证明这种方法，合成了基于多个自组装驱动力的胶凝剂G2。 G2可以形成具有强聚集诱导发射（AIE）的Ca〜（2+）配位金属茂CaG。用Cu〜（2+）掺杂CaG会导致AIE淬灭CaG并形成Ca〜（2+）和基于Cu〜（2+）的金属元素CaCuG。 CaCuG可以通过CN〜-与Cu〜（2+）的竞争配位以及Ca〜（2+）与G2的配位再次荧光检测CN〜-。这种方法可能会开辟通往新型刺激反应性超分子材料的途径。

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