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(a) Schematic representing the assembly and disassembly of A11-fluoride supramolecular polymer. (b) Emission spectra and photo showing the response of A11 in the presence of fluoride and other anions. (c) Photos showing the emission colour of supramolecular gels formed between A13 and fluoride and Zn2+. Reproduced with permission from [52,54]. Copyright 2018 and 2016, the Royal Society of Chemistry.
