Premium
Double Metal Ions Competitively Control the Guest‐Sensing Process: A Facile Approach to Stimuli‐Responsive Supramolecular Gels
Author(s) -
Lin Qi,
Sun Bin,
Yang QingPing,
Fu YongPeng,
Zhu Xin,
Wei TaiBao,
Zhang YouMing
Publication year - 2014
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201403327
Subject(s) - supramolecular chemistry , metal ions in aqueous solution , fluorescence , ion , metal , quenching (fluorescence) , chemistry , supramolecular assembly , selectivity , coordination complex , combinatorial chemistry , nanotechnology , materials science , molecule , catalysis , organic chemistry , quantum mechanics , physics
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.