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Internal imine derivatives of anthraquinone-18-crown-5
We have selectively synthesized and characterized several aliphatic internal imine isomers, which show selectivity towards various transition metal ions with large shifts in the UV–Vis and OFF-ON switching of fluorescence in solution. The stoichiometry with different transition metals has been determined to be 1:1, with the 1,2-ethylenediamine dimer showing the best selectivity towards Hg(II). Selectivity…