Double Metal Ions Competitively Control the Guest‐Sensing Process: A Facile Approach to Stimuli‐Responsive Supramolecular Gels. Issue 36 (23rd July 2014)

• Record Type: Journal Article
• Authors: Lin, Qi; Sun , Bin; Yang , Qing‐Ping; Fu, Yong‐Peng; Zhu, Xin; Wei, Tai‐Bao; Zhang, You‐Ming
• Is Part Of: Chemistry. Volume 20:Issue 36(2014)
• Page Start: 11457
• Page End: 11462
• Publication Date: 2014-07-23
• Subjects: Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201403327
• Languages: English
• ISSNs: 0947-6539

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 <bold>G2</bold> based on multiple self‐assembly driving forces was synthesized. <bold>G2</bold> could form Ca²⁺‐coordinated metallogel <bold>CaG</bold> with strong aggregation‐induced emission (AIE). Doping of <bold>CaG</bold> with Cu²⁺ results in AIE quenching of <bold>CaG</bold> and formation of Ca²⁺‐ and Cu²⁺‐based metallogel <bold>CaCuG. CaCuG</bold> could fluorescently detect CN⁻ with specific selectivity through the competitive coordination of CN⁻ with the Cu²⁺ and the coordination of Ca²⁺ with <bold>G2</bold> again. This approach may open up routes to novel stimuli‐responsive supramolecular materials.</p> </abstract>